What single-purpose Android app do you keep installing just to uninstall again?

I'm shipping PTK on May 6 — a single Android app that bundles 95 small tools (calculators, scanners, OCR, vault, sensors, dev utilities). The whole point is replacing those 30 apps you only use once or twice. Curious: what's the most "ugh, I just need this for 5 minutes and now it has 4 ads and a subscription pop-up" app you've ever installed?

Asking partly out of curiosity, partly to make sure PTK covers it.