Roland Zenbeats is a music creation app. The app itself has always been free, but the in-app purchase to unlock full functionality was previously £11.99.
To get this you need to create a Roland account, then go to the settings menu > Store > Unlocks > Unlock V1 > Add to Cart and Check Out.
Some more recent reviews saying it's a fairly capable music app, and can't really go wrong for free!
The "Zenbeats Unlock" gives you:
- All 23 instruments and effects fully unlocked
- AUv3 Support (on iOS)
- Sampleverse plus 500MB content pack
- Unlocked mixing features
- Pro export options including stems