Hi Young2000,
Cubasis has recieved more than thirty feature and maintenance updates, since its introduction in Dec 2012.
All of them were offer free of charge for existing customers.
Cubasis 3 was rewritten from scratch, adds a new iPhone and 20+ user-requested features.
Cubasis 2 in-app purchases can be freely transfered to Cubasis 3.
Unfortunately Apple does not offer comparable options, such as a “grace period” or similar.
Best wishes,
Lars