As long as your phone is an Android with 5.0 or newer (except for Huawei phones), or an iPhone that is compatible with iOS 13.1 or later, with support for BLE, then kegg should be compatible with your device. You can also use the kegg with any iPad that supports BLE and the iOS version we support.
Please check your phone specifications to ensure that they meet these minimum requirements.
To check phone specifications for iPhone:
Go to Settings → General → About → Model Name
To check phone specifications for Android:
Settings → System → About phone