Tools
PDF Editor hid paywalls and broke imports
In 12 weeks you can make $1,800/month by building a better offline-first PDF fixer for Android.
A universal TV remote buries volume control behind ads and a paywall
In 5 weeks you can make $2,700/month by building a clean universal TV remote.
AR Meter charges $15/week before you can even measure anything
In 5 weeks you can make $1,600/month by building a fairly priced AR measuring tape app.
Paid emulator broke trust with saves, spam, and UI
In 18 weeks you can make $1,200/month by building a better clean retro-emulator frontend.
BuzzKill is already the solo-built app a competitor would have to out-build
In 8 weeks you'd likely cap out near $900/month cloning BuzzKill (a beloved indie notification manager whose remaining bugs are Android's fault, not its own).
Game Booster 4x Faster Pro's own buyers can't agree it does anything at all
In 4 weeks you could make $800/month building a transparent, benchmark-backed game booster (closing the credibility gap this category never earned).
Network Analyzer Pro is a 4.9★ IT staple with almost no complaint to build against
In 6 weeks you'd struggle to clear $500/month cloning Network Analyzer Pro (a polished toolkit with no real fumble for a competitor to exploit).