Button Savior Pro 1.6.6 Full APK. Requires root for full year. Some keys can still work without root. If you are afraid of breaking hardware keys or you have broken keys or you simply do not have a key on your device, get Button Savior to make your life easier. This application displays a panel of floating software key can be convened at any time at any place. Salvador 1.1.6 or later Suppports now E-Ink screen with specially designed themes provided by XDA member Berlinski button.