!! This app is not meant, nor possible, to open, it is only meant to unlock features in the "A HIIT Interval Timer" app !!!! This is a "Licensing App". You also need to install "A HIIT Interval Timer" with v 2.1.1 or higher !!Nexus 7 users:Text-to-speech doesn’t work for some Nexus 7 users at the moment.Why buy this app?- Get rid of the ads- Unlock Text-to-speech function- Support the developer!A HIIT Interval Timer information:Easy to use workout timer for interval training. Create your own sets and workouts!Great training timer for Crossfit training, HIIT, interval timer, tabata, round timer, running, c25k timer, etc. – Merge several sets into large workout- Simple and intuitive interface- Warning ticks- Advanced sound settings- Skip forward in workout*** Samsung users: The app may crash when you set sound. I have not been able to reproduce the bug on Samsung Galaxy S or SII. If you have any idea what may be the cause, don’t hesitate to contact me. ***If you have questions, encounter bugs or have suggestions for improvements, please do not hesitate to mail me at: [email protected]: Internet access is used for Flurry Analytics and Ads.The app reads phone state in order to pause workout on incoming phonecalls.