There is currently a WIP SAS 3 iOS wiki, created by me (TigerBlood). If you have or would like more information about the iOS version please check it out here.
There are many differences between the iOS and PC version. Here are some of the main ones:
- There is no nightmare mode on iOS, players continue to gain XP normally after Rank 40.
- A number of ranks unlock different skills, such as rank 46 unlocks the skill "Medic" instead of "Fast Reload Specials". In 1.7 the Medic skill actually unlocks Hi-Cap magazines and not whatever it was supposed to. The AMT Team are working to fix this.
- Apocalypse mode is beatable in the mobile version, but not the PC version.