Louis Pereira, founder of AudioPen, developed a voice transcription tool in just 12 hours, which now earns $15,000 monthly. This app exemplifies his part-time indie hacking success, achieved with minimal costs and without a team.

Evgeny Unegovsky and Igor Diev founded Subscrible, an ad-free mobile gaming catalog app, aiming to improve the gaming experience by eliminating disruptive ads and lowering user acquisition costs for developers. They achieved this by spreading the acquisition costs across multiple titles. Subscrible now has over 15,000 users and generates significant monthly revenue.