Hayago - Chess Clock, Go Game Clock

free and open-source chess/go clock for android.

can be used for: chess | go/baduk | shoji
modes: byo yomi mode | canadian overtime | sudden death/normal

features:
- time increment
- fine-grained control: customize almost everything for each of the two
players
- audio feedback: Includes time up alert and a low time sound to denote the
last seconds of time
- visually intuitive: black and white buttons for it's respective player.
- help button for further understanding the user interface.
- works with all portrait screen-sizes (7 inch tabs, 10 inch tablets)
- no permissions needed
- no data storing/sharing
- does not need the internet
- clean and user friendly User Interface
- easy-to-read buttons