Bugs and cheats listed below can be replicated on a device without the need of cheat tools.
You can repeat timed special event missions by putting your phone in standy in a mission. This allows you to complete a map even after the 2 hour timer expires. Once you complete the map you can still very quickly open the missions tab and select that mission (if the event expired the timer reads 00:00). This allows for the near infinite replay of that mission, and the map resets every time. This trick can allow you to spam a mission, such as the G Metabok one, for tons of rewards. If you do not open the mission tab immediately after completing it however, the event dissapears.
Reload cheat - If one of your planes receives severe damage or is shot down. Force quit the app to restore to the latest auto-save point which will be the point right before you started the mission. There will be no damage to your planes however you will lose the followings; stamina, mercenary count, lunch ticket spent on that attempted mission. Note that if you force quit when you are playing NEW WORLD, you have to wait 9 hours of cool-time.