Pokémon GO can no longer be played on Apple with the old IOS. Niantic says that Pokémon GO only supports Apple device with iOS 11 which is the latest iOS from Apple that you can upgrade. Players with an old IOS must choose to leave Pokémon GO or to upgrade their phone, and this update will be released by the end of February.
“In an upcoming update to Pokémon GO, we will end support for Apple devices not capable of upgrading to iOS 11, such as iPhone 5 and iPhone 5c models. This change is a result of improvements to Pokémon GO that push the application beyond the capabilities of the operating systems on such devices. This change will take effect on 02/28/2018. After that date, Trainers using affected devices may no longer be able to access their Pokémon GO accounts from that device, or use their PokéCoins or other items in their Bags. They will need to switch to a supported device to continue playing Pokémon GO. You can see the full list of impacted devices and learn more by visiting our Help Center.” – The Pokemon GO team
For iPhone 5 and iPhone 5c users, you should be ready to leave Pokémon GO because they no longer support your device. If your iPhone can be upgraded to iOS 11, you can keep playing with nothing to worry.
Reportedly since Apple issued a new firmware, players feel that Pokémon GO Plus doesn’t respond well, there is some delay when pressing the action button, sometimes it even seems that the button doesn’t respond.
The steps taken by Niantic regarding the termination of support on the old Apple phone will reduce many loyal players of Pokemon GO, moreover not everyone wants to change the phone just to play Pokemon GO.