I've got a few other suggestions, if you want them:
The layout of the main screen with the app name and logo dominating the screen completely overshadows the menu buttons, making them difficult to read and even select correctly, especially the three buttons to the right of the logo. Whilst you obviously want to make sure people know what the app is called, funcionality should be key.
The shades used in each button are actually very similar to shades regularly used in many apps to show that that button is greyed out and therefore not available. I'd personally make the text and graphic within each button a little darker if the option is selectable.
Also, the "Record" button is slightly counter-intuitive. It's a grey circle when not recording and red circle when recording. I think the standard recording icons would be better, ie a circle to start recording and a square to stop recording, personally I'd make the circle red and the square black, but that's a matter of style I think.