For the maths 4

An expedition in reciprocation using a 5 piston radial engine. Commonly used in airplanes during WW1 before the rotary and then gas turbine took over.

TAP centre for fly-out icon menu.

TAP time to toggle 12/24hr

Menu options...

1. Colour/brightness picker

2. Schedule set

3. Steps counter

4. Customisation selection - 2 backgrounds, 2 hands, 7 rings

5. Watch Settings

6. Google Fit