Ok

This app needs more features for $4.99 , for example; A tuner would be nice, the ability to choose different amp models : 800rb, 2001rb ,mb series etc. Perhaps a future update could include this or as in app purchase.
The ability to choose more cabinets would be nice also. Anyhow pretty basic app for $4.99 , should be $1.99 at most.

Losbass about PocketGK - Bass Guitar Amp, v1.2