Build a $120K/Month App From Your Hobbies
Follow Kyle Fowler's exact playbook to find, build, and market a profitable app using problems from your own life.
Based on: I Built Two Apps That Make $120K/Month by Starter Story
Follow Kyle Fowler's exact playbook to find, build, and market a profitable app using problems from your own life.
Based on: I Built Two Apps That Make $120K/Month by Starter Story
What if the million-dollar app idea you've been searching for has been sitting in your hobbies this whole time? You've probably spent hours watching YouTube videos, browsing Reddit threads, and chasing trending niches — only to end up with a blank notes app and a vague sense of frustration. The problem isn't that you lack ideas. The problem is you're looking in the wrong place.
Here's what most aspiring app builders get wrong: they try to predict what the market wants instead of solving what they personally need. That approach leads to months of research paralysis and zero shipped products. Meanwhile, the best app founders are doing the opposite — they're building for themselves first, and the money follows.
Imagine waking up to a Stripe notification showing $15,000 in new subscriptions — not from some over-engineered SaaS product pitched to enterprise clients, but from a simple app you built around something you genuinely love. That's exactly what Kyle Fowler did. He's a sports card collector who looked at his own hobby, noticed there was no app to scan and value his collection, and built CardStock. Six years later, it pulls in $75,000 a month in recurring revenue. Then he did it again with Scanemon for Pokémon cards — $17,000 a month recurring, built in a single day using AI tools.
Kyle isn't a Silicon Valley genius with venture capital backing. He started with three guys in a basement, taught his friends to code so he could split the revenue, and figured it out as he went. His process is repeatable, low-risk, and more accessible in 2025 than it has ever been — because AI has collapsed the technical barrier to shipping a real app from months to hours.
On the Starter Story channel, Pat Walls sat down with Kyle to extract every step of his process: how he spots problems worth solving, how he validates ideas before writing a single line of code, how he built his tech stack, and how he drives downloads using TikTok slideshows and platforms like Noise. This checklist captures every actionable step Kyle shared so you can follow the exact same path.
This PDF checklist will walk you through Kyle's complete framework — from writing down your first problem idea, to building an MVP, setting up monetization with tools like RevenueCat or Superwall, and marketing your app so real people actually download it. Stop scrolling for inspiration and start executing. Your next app idea is already in your life — this checklist helps you find it and build it.
Every checklist item comes with actionable notes to guide you — things like "Don't forget to do this before you start," "Avoid this common mistake," or "Set a reminder for 30 days out." Nothing vague, just clear next steps.
+ 17 more action items inside...
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