Third-Party App
Mudita Kompakt is a minimalist phone that comes with a selection of apps developed specifically for this device and its E Ink display. While it's technically possible to manually install third-party apps (APK files) as MuditaOS K is based on the Android Open Source Project (AOSP), please keep in mind that sideloaded apps are not optimized for Kompakt's unique E Ink screen and may not always work as intended. MuditaOS K is designed to run without Google Services, so apps that depend on them will likely not function correctly.
Sideloading requires a computer connection via USB-C as the device does not include an APK loader. While sideloading will not harm the device and issues can be resolved by restoring factory settings, any resulting issues (like unexpected battery drain or performance problems) are not covered by the warranty.
For examples of sideloaded app performance, you can reference videos from various creators on YouTube.