Which iOS versions are supported?
The latest version of Threema supports iOS 9 and up. You can continue to install or use older Threema versions on your pre-iOS 9 device, but you won't be able to update to newer versions.
Here are the last supported Threema versions for each iOS release:
- iOS 5: Threema 2.4.3
- iOS 6: Threema 2.5.0
- iOS 7: Threema 2.6.2
- iOS 8: Threema 2.10.2
The effort needed to offer compatibility with older iOS versions is substantial. Apple doesn't provide a means to test working order and reliability of new app versions on old iOS versions. For this reason, we need to drop support for older iOS versions from time to time when we release larger updates.