If you are having trouble with a on a version you actually bought, I can help you troubleshoot the Google Play cache or account sync issues. How to fix license verification errors for a purchased app? Which Quake mods are compatible with the engine?
The Android operating system is renowned for its open-source nature and the flexibility it offers users to install applications from sources outside the official Google Play Store. This flexibility has given rise to a secondary market of modified applications, often distributed as APK files. Quad Touch Apk No License