This version does not have any of the restrictions applied to the Free version.
PRO vs FREE version:
If you choose to buy Pro version, you'll get:
- Mission videos.
- Play with soviets (instead of USA only).
- Purchase all hardware (without restrictions).
- Build all launch pads (instead of just two).
- Change default settings.
- Updates and enhancements.
- You can write to me and ask for particular updates.

There're still a few restrictions compared to the original DOS game. Mainly due to optimizations:
- You cannot UNDO purchases.
- Just one savegame (but you get autosave feature).
- You cannot edit astronaut / cosmonaut stats.
- You cannot replay mission videos (will probably be available later).

I do my best to support all devices. Please, if you want to make sure the game runs fine on your device, download the FREE version.