After more than 15 years covering everything Apple, it’s with a heavy heart we announce that we will no longer be publishing new content on iMore and the iMore forums will be closing as of November 1st, 2024.
Welcome to iMore! If you mean when will the 5/5c no longer get the newest OS, there's no way to know that. They will likely get iOS 10. Not so sure about iOS 11. Maybe. There's already apps not compatible with the 5/5c.