Mesmer's
Privacy Toys
Small Android apps that do one thing well and keep their hands off your data. They have no analytics, no ads, and no Google dependencies. All are free software under the GPL-3.0, with source on GitHub and builds headed for F-Droid.
Weather Balloon
A privacy-first, simplicity-first weather app. One screen with current conditions, the next 24 hours, and the next 7 days.