Price: Free / Up to $7.99
Cometin is a decent, but growing selection of tweaks and tricks for Android devices. It leverages the Dynamic Modules function from Google I/O 2019 in a unique sort of way. You can download modules for ambient display tweaks, a caffeine mode, and even the ability to remap an assistant button. The modules only download to your device as needed and are serviced by the Google Play Store. It even has a cloud storage option should you need it. The app seems to have some issues on Chinese OEM devices due to the heavily skinned nature of those devices.