25 ideas
Your own Cash App
A peer-to-peer payments app: send and request money by username, balance and transaction history, link a bank card and more.
Big buildYour own Venmo
A social payments app: pay or request friends, social feed of payments with emoji notes, privacy settings per payment and more.
Big buildYour own PayPal
An online payments and wallet service: wallet balance and history, send money by email, payment links and invoices and more.
Big buildYour own Robinhood
A stock trading app: watchlist with live prices, stock pages with charts, paper trading portfolio and more.
Big buildYour own Splitwise
An app to split shared expenses: groups for trips and housemates, add expenses split equally or by amounts, running balances and more.
WeekendYour own YNAB
A zero-based budgeting app: give every pound or dollar a job, category budgets that roll over, transaction entry and import and more.
1–2 weeksYour own Coinbase
A crypto exchange app: prices and charts for coins, watchlist and alerts, portfolio tracker and more.
Big buildYour own Rocket Money
A subscription and spending tracker: connect bank accounts, detect recurring subscriptions, spending by category and more.
1–2 weeksYour own QuickBooks
Small business accounting software: invoices and payments, expenses with receipts, bank reconciliation and more.
1–2 weeksYour own Xero
Cloud accounting software: invoices and quotes, bank feeds and reconciliation, bills and more.
1–2 weeksYour own Gusto
Payroll and HR for small businesses: employee records, pay runs, payslips and more.
Big buildYour own Deel
Global payroll and contractor payments: contractor contracts, invoices, payouts in many currencies and more.
Big buildYour own Expensify
An expense reporting app: snap receipts, read amount, date and merchant from the receipt, expense reports and more.
WeekendYour own FreshBooks
Invoicing and accounting for freelancers: clients and invoices, online payments, expenses and more.
WeekendYour own Wave
Free invoicing and accounting for small businesses: invoices, receipts, bank import and more.
WeekendYour own BILL
Accounts payable and receivable automation: upload bills and read them with AI, approval workflows, pay vendors and more.
Big buildYour own Ramp
Corporate cards and spend management: expense policies, receipt matching, approvals and more.
Big buildYour own Mercury
Banking for startups: accounts dashboard, payments and transfers, cards and more.
Big buildYour own Invoice Simple
A quick invoice maker: create invoices from a template, send as PDF or link, mark paid and more.
WeekendYour own Revolut
A digital bank and money app: accounts in many currencies, exchange, cards and more.
Big buildYour own TradingView
Charting and a social network for traders: interactive price charts, indicators, drawing tools and more.
1–2 weeksYour own Bloomberg Terminal
A financial data terminal: command bar for tickers and functions, quotes and charts, news feed and more.
1–2 weeksYour own TradeZella
A trading journal: import trades from brokers, tag setups, p&L stats and more.
WeekendYour own Polymarket
A prediction market: markets on future events, buy yes or no shares, prices as probabilities and more.
Big buildYour own Binance
A crypto exchange: markets, order book, trading and more.
Big build
More things to build
Upscalers, background removers, converters and generators. Image tools pull huge search volume and most of the work can run in the browser.
Compressors, croppers, GIF makers, subtitle generators and intro makers that people search for every month.
Voice generators, transcription, trimmers and noise removal. Pair a simple editor with a speech API and you have a product.
Hashtag, caption, title and bio generators, plus schedulers and thread tools. Small AI tools with steady search demand from creators.
Checkers, validators and generators for site owners: sitemaps, robots.txt, meta tags, SSL, speed and broken links.
Resume builders, AI writers and other everyday tools that people search for by name.
Profit, tax, churn, ROI and creator rate calculators. The easiest wins on this page: no backend, one formula, and searchers who are ready to act.
Your own take on ChatGPT, Perplexity, Midjourney, Otter and more, each with a prompt that wires up the API calls for you.
Feeds, follows, stories and communities: prompts for your own Instagram, Reddit, Threads or Letterboxd for a niche.
Chat, email and calls, from a Slack for your community to a Discord-style server app.
Swipe stacks, matches and chat for a niche dating app, with safety features built in from the start.
To-do lists, notes, wikis, kanban boards and project trackers. Most are a weekend to a week with Claude Code.
Form builders, help desks, e-signature, website builders and design tools. Plenty of people pay for each of these every month.
CRMs, email marketing, social schedulers and lead tools: the software that businesses pay per seat for.
Job boards, applicant tracking, shift scheduling and HR records for small teams.
Two-sided marketplaces and online stores, from a niche Etsy to a local Airbnb, with payments through Stripe Connect.
Scheduling, appointments, reservations and point of sale for local businesses: some of the easiest software to sell.
Workout logs, calorie counters, meditation and running plans. Many are a weekend build with a clear audience.
Flashcards, quizzes, courses and homework help, with Claude generating the lesson content.
Streaming, players, live video and media databases, with a video or audio API doing the heavy lifting.
Link-in-bio pages, newsletters, digital product stores, memberships and video editors for creators.
Maps, trail finders, flight trackers and booking tools built on open map data and travel APIs.
Scanners, file storage, password managers, blockers and other everyday tools.
Original browser games in the genres of the classics: puzzle, arcade, platformer, runner and party games. Your own name, art and levels, with familiar mechanics.
Give Claude more to work with while it builds: skills, MCP servers and subagents. Once it ships, use the overnight prompts to find users for it.