1. Keep the seconds Bar - its cool and it doesnt take too much away from screen real-estate

2. Take away the text "Setup" and "Alarms" from the top corners - it goes against the visual flow of the application.

3. You could make the arrow on top and bootom more prominent to make user realise you got to slide up or down to reach the Alarms and settings screens maybe.

4). Keep both screens seperate - Alarms and Settings with the main clock page in middle as the functioning page

5) Oh, exit button - a must - newbies WILL absolutely trip up on not seeing any exit - since not many realize to use the hardware buttons to exit (even I wouldn't have).

6_ As someone else suggested make the mode button say Night Mode and Day mode ...

7) on Night mode, the day mode (or change mode) button still doesnt show - so no way to understand you can change mode on that invisible button area.

Great app so far ...