Android 2.3 and 3.x support support will be discontinued starting from RaceChrono v4.3. I wish I could support all old versions, but it is simply too much work to support many old OS versions, and the Android 6.0 is already around the corner.
The minimum OS version for the new RaceChrono will be Android 4.0. The old version will stay available in Play Store, so you can keep using it on your old devices.
