Monday, June 29, 2026

I want to build an app called "FlipScore". ## The Problem Sports fans and smaller leagues have no affordable, visually delightful way to display live game state online, and the HN flip-board display proved the aesthetic has strong viral pull. ## Target Audience Amateur sports league organizers, esports tournament runners, hackathon organizers, and event planners ## Core Idea Embed a beautiful retro flip-board live scoreboard on any website for your sports league or event. FlipScore lets small sports leagues, esports organizers, and event runners embed a visually delightful split-flap display scoreboard on their website with a simple script tag, updating live via a dead-simple admin dashboard. Inspired by the viral HN flip-board Hacker News display, it brings that same satisfying aesthetic to live sports scores, leaderboards, and countdowns without requiring any video streaming infrastructure. Revenue comes from a per-event or monthly subscription for leagues wanting custom branding and multiple simultaneous boards. ## Monetization Strategy $19/month per league for custom branding and unlimited boards; free single-board tier with FlipScore watermark ## Requirements - Category: Social - Difficulty: Week - Suggested stack: Next.js + Supabase Realtime + Auth Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "TechFilter". ## The Problem Developers trying to follow non-AI tech news are overwhelmed by AI story saturation on Techmeme and increasingly on HN, with a 126-upvote HN post explicitly calling for tech news sources that exclude AI coverage. ## Target Audience Developers, sysadmins, and tech readers who want signal on non-AI topics ## Core Idea A curated tech news feed with a hard-off switch for AI content. TechFilter aggregates Hacker News, Lobsters, and tech RSS feeds and lets users completely exclude AI-related stories with a single toggle, surfacing the systems programming, indie hacking, security, and tooling posts that get buried under the daily AI avalanche. An optional slider lets users control how aggressively AI content is filtered rather than an all-or-nothing approach. Revenue comes from a one-time purchase or optional supporter subscription. ## Monetization Strategy One-time purchase at $9.99 or $3/month supporter tier for custom feed configurations and mobile push digests ## Requirements - Category: Productivity - Difficulty: Week - Suggested stack: Next.js + localStorage or Supabase + PWA Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "VibeFlow". ## The Problem Users want a music app with a single-tap play button and vibe customization by activity and mood rather than having to select a specific playlist — a gap explicitly identified in a Software Recommendations request citing Yandex Music's unique features. ## Target Audience Casual music listeners frustrated by decision fatigue in Spotify and Apple Music ## Core Idea One-tap music that matches your mood and activity without choosing a playlist. VibeFlow lets you set your current activity and mood with two quick taps, then starts playing music immediately — no playlist browsing required. It learns your preferences over time and adapts the energy of tracks to your context, inspired directly by the Yandex Music feature that no Western streaming app has replicated. Monetize via a freemium model with premium mood profiles and offline playback. ## Monetization Strategy Freemium — free tier with basic moods, $4.99/month for custom activity profiles, offline mode, and cross-device sync ## Requirements - Category: Productivity - Difficulty: Month - Suggested stack: Next.js + localStorage or Supabase + PWA Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "SlopCI". ## The Problem AI-generated code passes syntax checks but introduces structural anti-patterns with no automated detection in CI — the repo-slopscore Lobsters thread generated 65 comments from frustrated teams who want this in their pipelines. ## Target Audience Engineering teams using AI coding assistants who want to maintain code quality standards ## Core Idea A CI bot that scores every PR for AI-generated structural anti-patterns before it merges. SlopCI installs as a GitHub App and runs a configurable set of structural checks on each pull request — detecting empty catch blocks, dead code, meaningless variable names, and directory layout violations that linters miss but experienced reviewers catch immediately. Each PR gets a slop score with an inline comment explaining each flag, and teams can set a score threshold that blocks merge. It differs from existing linters by focusing on structural quality signals rather than syntax rules. ## Monetization Strategy $15/month per repository, free for public open-source repos, enterprise flat-rate pricing for unlimited private repos ## Requirements - Category: Developer Tool - Difficulty: Week - Suggested stack: Node.js CLI or VS Code extension + TypeScript Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "CodeColorPaste". ## The Problem Users copying syntax-highlighted code from ChatGPT and other AI tools lose all color formatting when pasting into Google Docs — a frustrating daily friction point described on Web Apps Stack Exchange with the user noting they had exhausted every obvious solution. ## Target Audience Developers, students, and technical writers who document code examples in Google Workspace ## Core Idea Copy syntax-highlighted code from any AI chat tool and paste it into Google Docs with full color formatting intact. CodeColorPaste is a browser extension that intercepts clipboard copy events from ChatGPT, Claude, and similar tools, re-encodes the syntax-highlighted HTML as rich text that Google Docs correctly interprets, and places it on the clipboard — so pasting into Docs preserves every color token exactly as it appeared in the chat. It requires no configuration and works transparently alongside normal copy-paste. A pro tier adds custom theme overrides and one-click export to Google Slides. ## Monetization Strategy Free core extension, $4/month Pro for custom themes, Slides export, and Notion paste support ## Requirements - Category: Productivity - Difficulty: Weekend - Suggested stack: Next.js + localStorage or Supabase + PWA Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "ZanaPlay". ## The Problem Clever browser-based word and logic games like Zanagrams get a moment of HN fame then disappear with no persistent home or community to keep players engaged. ## Target Audience Casual gamers, word puzzle enthusiasts, and Wordle-style daily challenge fans ## Core Idea A word game hub that surfaces hidden gems like anagram puzzles through a curated daily challenge feed. ZanaPlay aggregates and curates browser-based word and logic games — like the Zanagrams anagram game that scored 367 on HN — into a single daily challenge app with streaks, leaderboards, and social sharing. Instead of hunting for clever indie games scattered across the web, players get one destination with a new handpicked puzzle each day. Monetized through a premium tier with unlimited replays, hint packs, and an ad-free experience. ## Monetization Strategy $4.99/month premium tier for unlimited replays, hints, and ad-free play; free tier with one daily challenge ## Requirements - Category: E-commerce - Difficulty: Weekend - Suggested stack: Next.js + Shopify API or Stripe Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "BibleSemantics". ## The Problem People searching sacred and classical texts by keyword miss semantically relevant passages, and the RAG-based approach demonstrated in the HN Show has no polished product form available to general audiences. ## Target Audience Religious educators, theology students, philosophy readers, sermon writers, and curious general readers ## Core Idea Search any sacred or classical text by meaning rather than keyword and find passages that match your modern question. BibleSemantics extends the viral 'Bible as RAG Database' HN project into a polished multi-text semantic search tool covering the Bible, Quran, Bhagavad Gita, Stoic texts, and public domain classics, letting users type natural language concepts and get ranked passages with commentary. The core innovation shown in the HN demo — that 'more money more problems' returns exactly the right Ecclesiastes passage — is the product, packaged with a clean UI, shareable result links, and embeddable widgets for faith communities and educators. Monetized through a freemium model with a pro tier for custom text uploads and private annotation layers. ## Monetization Strategy $8/month pro tier for custom text uploads, private annotations, and embeddable widgets; free tier covers five standard texts ## Requirements - Category: Education - Difficulty: Week - Suggested stack: Next.js + Supabase + MDX for content Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "PresenceKit". ## The Problem Developers want to add a social presence layer to websites but building real-time WebSocket infrastructure from scratch is expensive, complex, and time-consuming — confirmed by 300+ combined upvotes across two HN posts. ## Target Audience Indie hackers, SaaS founders, and frontend developers adding collaborative or social features to web apps ## Core Idea Add live user presence — cursors, avatars, and activity — to any website with one script tag. PresenceKit is a drop-in JavaScript SDK that gives any website real-time user presence features including live cursors, online avatars, typing indicators, and room-based co-browsing, backed by a managed WebSocket infrastructure so developers don't have to build or scale it themselves. The TownSquare Show HN post and the follow-up presence layer post together generated nearly 300 upvotes and 300 comments confirming that developers want this as a turnkey primitive rather than a DIY infrastructure project. Pricing follows a per-seat model with a generous free tier for prototyping. ## Monetization Strategy Free up to 1,000 monthly active users; $29/month for 10K MAU; $99/month for 100K MAU with custom branding ## Requirements - Category: SaaS - Difficulty: Month - Suggested stack: Next.js + Supabase + Stripe Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "TodoistReplace". ## The Problem Todoist users report multi-year sync failures between iOS and desktop where completing tasks from notifications doesn't register and Siri-created tasks disappear silently, causing real productivity loss. ## Target Audience Productivity-focused individuals and small teams frustrated by Todoist sync reliability, especially heavy mobile users ## Core Idea A dead-simple task manager that actually syncs reliably between iOS, Android, and desktop without data loss. TodoistReplace is a lightweight task manager built around one promise: changes you make on your phone appear everywhere within seconds and are never silently lost. App Store reviews for Todoist show years of complaints about sync failures between mobile and desktop, tasks completed from notifications not registering, and Siri-created tasks disappearing — problems that have persisted for years with no fix. The app earns revenue through a simple flat subscription with no feature gating beyond team collaboration. ## Monetization Strategy $5/month flat subscription; free tier for single-device use with up to 50 active tasks ## Requirements - Category: Productivity - Difficulty: Month - Suggested stack: Next.js + localStorage or Supabase + PWA Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "ForgeChange". ## The Problem Jujutsu and other non-Git VCS users have no forge that supports change-centric workflows — GitHub and GitLab assume branch-based PRs that map poorly to how these tools actually work, as discussed extensively in the 59-upvote Lobsters forge feature request thread with 91 comments. ## Target Audience Developers using Jujutsu, Sapling, or other change-centric version control systems ## Core Idea A lightweight forge that speaks Jujutsu's change-centric model natively instead of forcing it into Git branch metaphors. ForgeChange is a self-hostable web forge designed from the ground up for Jujutsu and other change-centric VCS workflows, replacing the branch-PR model with a change-request UI that maps cleanly to how these tools actually structure history. Code review, CI integration, and merge queues are all expressed in terms of changes and revsets rather than branches and commits, eliminating the mismatch that forces Jujutsu users to mentally translate between their tool and GitHub's assumptions. A hosted SaaS tier targets small teams and indie projects. ## Monetization Strategy Free self-hosted open-source version, $12/month per user hosted SaaS with CI runners and SSO ## Requirements - Category: Developer Tool - Difficulty: Month - Suggested stack: Node.js CLI or VS Code extension + TypeScript Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "ReMarkableCode". ## The Problem reMarkable users who code have no native coding environment and must leave the device entirely for any interactive programming, despite the tablet's ideal distraction-free form factor for exploratory work. ## Target Audience Developer-owned reMarkable tablet users, academics doing exploratory algorithm design, and programmers seeking a distraction-free coding environment ## Core Idea Write and run code directly on your reMarkable tablet with a handwriting-aware REPL for multiple languages. Inspired by the viral Edsger project — a handwritten Clojure REPL for the reMarkable 2 that scored 66 on Lobsters — ReMarkableCode extends the concept into a multi-language handwriting-aware coding environment supporting Python, JavaScript, and Clojure, with handwriting-to-code conversion and inline result rendering optimized for the e-ink display. It targets developers and academics who want a distraction-free, paper-like environment for exploratory programming and algorithmic sketching. Revenue comes from a one-time app purchase with optional language packs for specialized environments like data science or logic programming. ## Monetization Strategy $19 one-time purchase; $4.99 per additional language pack for specialized environments ## Requirements - Category: Developer Tool - Difficulty: Month - Suggested stack: Node.js CLI or VS Code extension + TypeScript Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "DreamLens". ## The Problem People with PTSD nightmares and dream-curious users have no dedicated app for recording dreams and identifying trends — existing diary apps lack dream-specific pattern analysis entirely, as flagged on Software Recommendations Stack Exchange. ## Target Audience People with PTSD nightmares, therapy patients tracking sleep patterns, and dream-curious individuals ## Core Idea A dream journal app that automatically surfaces patterns, recurring symbols, and trends across your entries over time. DreamLens is a dedicated mobile journal for recording dreams immediately upon waking, with voice-to-text capture, mood tagging, and NLP-powered analysis that identifies recurring themes, characters, and emotional patterns the user may not consciously notice. Unlike generic diary apps it offers a timeline heat map of dream intensity, a symbol frequency tracker, and weekly insight digests — particularly useful for PTSD nightmare monitoring. A one-time purchase removes ads and unlocks pattern analytics. ## Monetization Strategy $2.99 one-time unlock for full analytics, optional $1.99/month cloud backup and therapist-shareable PDF reports ## Requirements - Category: Health - Difficulty: Month - Suggested stack: Next.js + Supabase + PWA + Chart.js Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "JXLShot". ## The Problem Android users want a camera app that saves photos as JPEG XL for its superior compression and royalty-free open-source license, but no mainstream camera app supports it — a gap explicitly identified on Software Recommendations Stack Exchange. ## Target Audience Android power users, photographers, and privacy-conscious users who care about storage efficiency and open formats ## Core Idea An Android camera app that saves every photo as JPEG XL for best-in-class compression with no patent fees. JXLShot replaces the stock camera app with a clean minimal interface that captures photos and saves them natively as JPEG XL, delivering roughly 60% better compression than legacy JPEG, full HDR support, and progressive decoding — all under a royalty-free open-source license. Users get a live storage-savings counter showing how much space they have reclaimed compared to JPEG. A paid unlock adds RAW+JXL dual capture and a batch converter for the existing camera roll. ## Monetization Strategy Free app with a $3.99 one-time Pro unlock for RAW+JXL dual capture, batch conversion, and gallery integration ## Requirements - Category: E-commerce - Difficulty: Month - Suggested stack: Next.js + Shopify API or Stripe Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "NotionEvac". ## The Problem Notion iOS users report deleted workspaces, broken voice-to-text for months, and crashing comments, but feel trapped because migrating years of notes feels impossibly risky without a reliable continuous export tool. ## Target Audience Heavy Notion users, knowledge workers, and teams who have accumulated years of notes in Notion ## Core Idea One-click export and migration tool that rescues your Notion workspace before it crashes, deletes, or locks you out. NotionEvac is a desktop app that continuously mirrors your Notion workspace to local Markdown and SQLite, so when Notion's buggy iOS app deletes your workspace, breaks voice-to-text, or crashes mid-edit, you have a complete recoverable backup. It runs scheduled silent syncs and alerts you to new content that hasn't been backed up yet, and includes a migration wizard to import cleanly into Obsidian, Logseq, or plain folders. Pricing is a flat annual subscription with a free tier for workspaces under 500 pages. ## Monetization Strategy $6/month or $49/year subscription; free for workspaces under 500 pages ## Requirements - Category: Productivity - Difficulty: Week - Suggested stack: Next.js + localStorage or Supabase + PWA Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "ArchivePin". ## The Problem Researchers and writers manually construct Wayback Machine snapshot URLs when referencing pages that may disappear, as described in a Web Apps Stack Exchange question about reliably fetching the latest existing snapshot with no clean automated solution. ## Target Audience Journalists, researchers, academics, and developers who cite online sources ## Core Idea One-click Wayback Machine pinning that always returns the freshest available snapshot of any URL. ArchivePin is a browser extension and API that, given any URL, automatically resolves and returns the latest existing Wayback Machine snapshot — no manual date-fiddling required. Writers, researchers, and journalists can pin references with a single click and get a permanent archival link they can trust. A hosted API tier lets developers integrate reliable snapshot resolution into their own tools. ## Monetization Strategy Free browser extension with a paid API tier at $9/month for bulk snapshot resolution and webhook notifications ## Requirements - Category: Productivity - Difficulty: Weekend - Suggested stack: Next.js + localStorage or Supabase + PWA Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "DecompQuest". ## The Problem The game decompilation community has no structured learning path — knowledge is scattered across Discord servers, wikis, and individual projects, making it extremely hard for newcomers to start despite strong interest. ## Target Audience Retrocomputing enthusiasts, game preservation volunteers, CS students interested in low-level programming, and emulation community members ## Core Idea An interactive platform to learn game decompilation through guided hands-on missions with real ROM files. DecompQuest turns the hard-won knowledge of the game decompilation community — like the GameCube decomp academy that scored 194 on HN — into a structured learning platform with progressive missions, in-browser disassembly tools, and community-submitted game targets. Learners start with simple function matching exercises and work up to full function decompilation with automated matching score feedback, mirroring how projects like Star Fox Adventures are tackled. Monetized through a pro tier with private workspaces, team collaboration on shared decomp projects, and access to hint libraries. ## Monetization Strategy $12/month pro tier for private projects, team features, and hint libraries; free tier for public missions ## Requirements - Category: Education - Difficulty: Month - Suggested stack: Next.js + Supabase + MDX for content Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "SlackPasskey". ## The Problem Slack shows a 'double-check this link' warning on every internal IP address or private network URL, adding constant friction for engineering teams who share monitoring dashboards dozens of times a day — raised on Web Apps Stack Exchange with no working solution. ## Target Audience Software engineers and DevOps teams who share internal links in Slack workspaces ## Core Idea A browser extension that silently bypasses Slack's internal-link warning dialog for private network URLs. Engineering teams share internal IP addresses, monitoring dashboards, and staging environment URLs dozens of times per day, but Slack intercepts every click with a 'double-check this link' modal that cannot be disabled. SlackPasskey is a lightweight browser extension that detects private IP ranges and intranet hostnames and auto-confirms the dialog, restoring single-click navigation. It ships with configurable allow-lists so security-conscious teams can whitelist only their own internal ranges. ## Monetization Strategy Free core extension, $5/month team license for centralized allow-list management and SSO policy enforcement ## Requirements - Category: Developer Tool - Difficulty: Weekend - Suggested stack: Node.js CLI or VS Code extension + TypeScript Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "EstoniaKit". ## The Problem Founders setting up Estonian e-Residency companies encounter many undocumented surprises not covered in official documentation, including banking failures, unexpected tax obligations, and service provider traps. ## Target Audience International founders considering or actively running an Estonian OÜ for their SaaS business ## Core Idea The undocumented playbook for Estonian e-Residency — everything the official docs don't tell you, organized by stage. EstoniaKit is a structured wiki and interactive checklist built from community-sourced lessons about running an Estonian OÜ, covering the banking surprises, tax edge cases, service provider comparisons, and compliance gotchas that the official e-Residency documentation omits. The HN thread on this topic generated 77 comments of hard-won insights from actual founders, and EstoniaKit turns that tribal knowledge into a searchable, stage-aware guide updated by the community. Revenue comes from a one-time purchase for the full playbook plus optional paid consultations with verified practitioners. ## Monetization Strategy $29 one-time purchase for full structured playbook; free preview of first two stages; optional $150/hr vetted advisor sessions ## Requirements - Category: SaaS - Difficulty: Week - Suggested stack: Next.js + Supabase + Stripe Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "SlackOAuthBulk". ## The Problem Configuring a Slack app with ~30 OAuth scopes requires clicking through a dropdown 30 separate times with no bulk-add option, wasting significant developer time. ## Target Audience Developers building Slack integrations and platform engineers configuring Slack apps ## Core Idea Add dozens of Slack OAuth scopes in one paste instead of clicking through them one by one. SlackOAuthBulk is a browser extension that enhances the Slack app configuration UI to accept a bulk-paste of scope names and add them all at once, eliminating the tedious one-at-a-time dropdown workflow when configuring apps with 20-30 scopes. It validates scope names client-side before submission and shows a diff of what will be added. A one-time purchase removes a daily scope limit and unlocks import/export of scope sets for team sharing. ## Monetization Strategy One-time $9 purchase for unlimited scope sets and team export; free tier limited to 10 scopes per session ## Requirements - Category: Developer Tool - Difficulty: Weekend - Suggested stack: Node.js CLI or VS Code extension + TypeScript Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.

I want to build an app called "PlanetView". ## The Problem Researchers and enthusiasts need to calculate planetary positions and transits as seen from arbitrary planetary surfaces using user-provided ephemeris files — a capability absent from all mainstream planetarium apps, flagged on Software Recommendations Stack Exchange with no viable solution. ## Target Audience Astronomy researchers, space enthusiasts, and planetary scientists ## Core Idea Calculate and visualize planetary transits and astronomical events as seen from the surface of any planet using your own ephemeris files. PlanetView fills the gap left by every mainstream planetarium app by letting researchers and enthusiasts upload JPL Development Ephemeris or VSOP files and compute sky positions, transits, and mutual occultations as observed from arbitrary planetary surfaces — Mars, Europa, or a custom body. Results are displayed as interactive sky charts with exportable event tables. A hosted version handles ephemeris processing for users who don't want to manage files locally. ## Monetization Strategy Free tier for basic calculations up to 5 bodies, $12/month Pro for full ephemeris uploads, batch event tables, and API access ## Requirements - Category: SaaS - Difficulty: Month - Suggested stack: Next.js + Supabase + Stripe Please help me build this step by step. Start with: 1. A project structure and initial setup 2. The core data models 3. The main feature implementation 4. A simple but polished UI Keep it lean — MVP first, ship fast. Use modern best practices and make it production-ready.