If you've thought about building an app, I've built 2 now, both live on iOS + Android, and the biggest surprise was how easy “building the app” is vs. actually getting it LIVE on the market. 1st app, Co-Founder AI started as a test to see what I could realistically build with AI. You fill in your profile → get business ideas matched to you → pick one → get tools + guidance to start moving on it. 5 free ideas → hard paywall iOS · Android 2nd app came from scratching my own itch Different niche, different model: 7-day free trial → paid. So I've now gone through two pretty different app flows, paywalls, review processes and sets of problems. ❗Here's what I wish I knew before the first one: 1. Building the app is probably the easy part Getting something working on localhost can happen stupidly fast now. Getting it working properly on actual iPhones + Androids is where things start showing cracks. - safe areas - keyboards - logins - APIs - purchases - saved data - different screen sizes "It works on my computer" does not mean much anymore 🥲 2. Pretty screens are only one layer A real app can quickly turn into: UI → code → database → auth → APIs → payments → backend → analytics → stores Forget one important part and you'll probably meet it again later. Usually when you're trying to launch. 3. Login became a whole project by itself Google login sounded simple. Then came Apple login, redirect URLs, syncing user data, switching phones, restoring purchases, logging out properly and account deletion. 4. Publishing the app does not mean the app runs itself If your app uses AI, accounts, saved data or APIs, you probably need a backend running somewhere. Mine uses Railway / Supabase The App Store hosts the app. It does not magically host everything behind it. 5. Get the boring stuff ready before launch week