While the original TouchOSC was a pioneer, the Mk2 version (often simply called "the new TouchOSC") brings professional-grade features that turn your Android or iOS device into a bespoke control surface: Cross-Platform Performance
Compared to the legacy Mk1, the newer version offers significant upgrades: touchosc mk2 apk
Verdict: TouchOSC Mk2 is currently the only actively developed, high-performance wireless control surface for Android. The APK is your gateway, but the license is the key. While the original TouchOSC was a pioneer, the