These are often system-level packages provided by device manufacturers and typically do not require manual installation unless you are debugging authentication services:
: An educational environment for low-level computing enthusiasts to write and assemble 16-bit Megaprocessor code. Download ASM apk
: A tactical medicine simulator focused on TCCC (Tactical Combat Casualty Care) guidelines. It is available on the Google Play Store and APKPure. These are often system-level packages provided by device