If your device runs on iOS 8 or Android 4.0 or any other latest version then you're ready to go into the past to fix the future! While you jump between the historical ages, you learn to communicate efficiently in English and by the time you get to the end, not only the time, but your linguistic performance is guaranteed to have improved. On Android, two versions can be reached to ensure that your device won't work up too much of a sweat. You receive a version without animations if a older system works on your device and the system selects this automatically for you.