UltraChrono measure the elapsed time between two instants during days and months. With Ultrarunners in mind, UltraChrono is optimized to work as long as it can spending the minimum energy.
Where is the trick? The native chrono app uses a background process to control the elapsed time and during all this period, this process is consuming battery. UltraChrono only record the start instant and each time you start the widget, UltraChrono calculates the duration between the current time and the start time. This means that the measurement only need battery when the widget is visible.
With this design, you can restart your watch, run out of battery, etc. but you will always get the elapsed time when you view the widget.
The red mark show the seconds and the green arc the minutes.
Enjoy!
