Pokemon GO will be discontinued for Apple devices that can't be updated to iOS 11
Apparently, the new change will take effect on February 28 via an update to the game. The reason behind Niantic's decision to discontinue support for Apple devices that can't be upgraded to iOS 11 stems from that fact that improvements to the game are now pushing Pokemon GO “beyond the capabilities of the operating system on such devices.”
Your Pokemon GO account will not be lost, but you will need to switch to a supported device to continue to play the game. Here are all Apple devices that will be affected by this change: iPhone 5, iPhone 5c, iPad 4th Gen, iPad 3rd Gen, iPad mini, and iPad 2.
Things that are NOT allowed: