Just an analog clock. Very friendly on the battery. Because you use all the apps instead.

You can use the AOD-simulator to keep the screen on for a longer time. (That impacts the battery)

Counter on the bottom left is a day-counter. You can set a date in the settings of fitbit watch on your phone.

Day and date at 3 o'clock.

On the top left there's a battery icon that shows the percentage.

If loading above 90% it will buzz.

If load gets below 20% it will buzz.