KK AppLock - Safest App Lock

v3.91 update(2016-8-12):
1. New default theme
2. Refine the setting UI and UE
3. Fix one security issue
4. Fix crash bugs

v3.9 update(2016-7-13):
1. Remove "anti-uninstall KK AppLock" and "prevent install/uninstall" features as we have received notification from Google to remove them.

v3.8 update(2016-6-23):
1. Free all the prime features
2. Optimize settings
3. Optimize pattern lock
4. Material dialog UI

v3.9 update(2016-7-13):
1. Remove "anti-uninstall KK AppLock" and "prevent install/uninstall" features. (Note: although we think they are good features for security app, and they are controlled by users, they are not vicious; but we have received notification from Google to remove them. Sorry about that, thanks for your continual support)

v3.8 update(2016-6-23):
1. Free all the prime features
2. Optimize settings
3. Optimize pattern lock
4. Material dialog UI