31 of 406 ideas

A solo-built real-time bus/train tracker covering 160+ cities, downloaded 5.2M times, grown to $30K/mo in subscriptions on free App Store keyword optimization (ASO) alone.

An AI scriptwriting SaaS for YouTube creators built on selling before building — $20K pre-sold before the product existed, then 4,000+ customers, ~$30K/mo, and $700K in annual sales inside 18 months.

A non-technical Amazon seller built an AI product-research tool in 48 hours with Cursor, then borrowed someone else's distribution — a rev-share deal with a coaching company sitting on thousands of students — and hit ~$21.8K/mo in 90 days.

Stephen has shipped hit app after hit app, and he's publishing his four-step idea-validation framework. Posted is doing $90K/mo right now; his last one, PuffCount, hit $44K/mo before he sold it. The core of the method: marketing is 90% of the outcome.

Generate coloring-book covers, interiors, and A+ content with AI, pick the niche with precision, publish to Amazon KDP — two books cleared $10,155 in a year.

An “emergency button” app built for panic attacks and anxiety

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

A browser extension that turns any foreign-language YouTube video into native-language subtitles with one click, right inside the player

An AI assistant built for lawyers, sold to Thomson Reuters for $650M in cash

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

Take the agency work of "building scorecard assessments for clients" and productize it into self-serve SaaS

A browser tool that lets IT admins deploy apps to Microsoft Intune in one click — so boring nobody copies it, yet it makes $60K/mo

One faceless compilation channel, 500 million long-form views, $2.3 million in lifetime AdSense — built entirely by copying a competitor's video and making it 10% better.

Two tiny iOS apps that plug the gaps in someone else's software — open-sourced on GitHub and still selling on the App Store, doing $433 in thirty days from two Reddit posts and one YouTube video.

$1.6B in a quarter growing 85%, 150% net revenue retention, and a sales motion that compresses a year-long enterprise cycle into a five-day workshop on the customer's own data.

A contractor turned three clients' repeated requests into a SaaS product, grew it to $883K of exit value on blog posts alone, and never made a single outbound sales call