9 of 406 ideas

An AI fitness app that builds custom smart training plans for gym strength training

An indie hacker doing $77K/mo across 35 products, with a single core methodology — never stop shipping. His latest: a Mac desktop app that watches your posture through the webcam

Single-feature niche apps that identify and price anything from one photo — one team built a whole portfolio across coins, rocks, antiques, and insects, with the top app doing $500K/mo

Rebuilt the played-out affirmation app specifically for Nordics living through four-hour winter daylight, then hit a few thousand dollars a month with onboarding conversion + TikTok ads

Upload a PDF, lecture deck or YouTube video and it auto-generates practice questions, wrapped in a Duolingo-style growth tree that scales on retention instead of a hard paywall

A weekend-built flashcard app for one obscure professional certification exam: $31K revenue in 8 months on $140 of total costs

A screen-time blocker that makes you pray before Instagram opens — one gimmick feature, one religious community, $40K a month.