The premium voice effects have an asterisk next to them. If you select the free voice effects (the ones without the asterisk) you will NOT be prompted to buy the premium voice effects. I believe there are currently 16 FREE voice effects in the app. NOTICE: There is also an iOS version of this app, available from the Apple AppStore. NOTE: When recording, try using different recording volume levels (look for the recording volume control within the app) in order to find the levels that work best for your device. The default recording level of 1 may not be optimal for your device, so you may need to play around with that setting to get good recordings.. If you hear excessive static during playback, try lowering your recording volume and make a new recording using this lower recording volume setting.