Instead of looking for a sketchy 2.21 APK, use Geode . It is a mod loader that allows you to add "2.21-style" features—like practice music hacks, detailed editor tools, and UI improvements—to the official game safely.
: These APKs are prone to crashing because they are built on unfinished code. geometry dash 221 apk better
: Physics are now more consistent across high refresh rate monitors, though an option exists to use "old" physics for legacy levels. Platformer Mode Skills Instead of looking for a sketchy 2