A personal blog about software developmenthttps://adngx.pages.dev/en-ushttps://adngx.pages.dev/posts/i-built-a-mobile-app-in-3-weeks-then-i-found-out-it-already-existed-for-free/https://adngx.pages.dev/posts/i-built-a-mobile-app-in-3-weeks-then-i-found-out-it-already-existed-for-free/I learned JavaScript, built a GTD app in 3 weeks, and thought I was ready to start a business. Then I found out my app already existed — for free.Wed, 15 Jul 2026 00:00:00 GMT