Today we've released two minor versions - 0.11.2 and 0.11.3. The first one introduced some minor fixes and enhancements of UI, but introduced a sever bug for Androids < 5 version. Thanks to reports from you, we've noticed it almost immediately and uploaded the new 0.11.3 version. Should be ok now.
The update brings a new feature of showing your running pomodoro cycle in the status bar. No 'Stop' action, yet, and no other features, but should help you track the work/break cycle without having the app stay open.