The iFit All Day Fitness app that is used to upload and manage your iFit Act device has the following compatibility requirements.
For IOS, an iPhone 4S, 5S, 5C, and above are required. iPod Touch 5th generation and above.
Android 4.3 with Bluetooth 4.0 with BLE is required.
The iFit Act device uses Bluetooth low energy, also known as BLE.