Smart Time Sync

3/1/2017

Version 1.72:
- Fix another issue with Android 6.0
- Fix some crashes

Version 1.71:
- Fix issue with Android 6.0

Version 1.70:
- Automatically switches to HTTP time source if NTP source is unreachable
- Added setting to remember last time source to turn it on at next startup
- Retains source choice after screen orientation change
- Fix NTP start delay
- Return old "time sync method"

Version 1.61:
- Fix crash on some devices.