Works for tabata, jump rope and any kind of interval training(HIIT). The regular interval is 3 minutes of workout with 1 minute of rest. However, you can set and regulate your own time interval by the setting!
1.4.2: support landscape mode 1.4.0: unexpected crashes fixed 1.3.9: background service bug fixed 1.3.7: several bugs fixed 1.3.6: faster loading speed 1.3.0: translated into english 1.2.5: optimized all layouts 1.2.3: support high resolutions 1.2.2: applied new app icon 1.2.0: setting for max round 1.1.0: setting for time interval 1.0.2: applied new GUI 1.0.1: removed full screen mode 1.0.0: app launched