Data Loss and corruption of game code

For no discernible reason both my iPad and iPhone have had an issue with the game freezing on startup and corrupting the game code, causing me to lose all saves and preferences. It is very annoying and I would like this to be fixed as soon as possible. The only fix is to delete all data from the device and re-download the app from the AppStore, this has happened to me 4 times and I have lost about 20 save files overtime