Hole19 for iOS works with iOS version 9 or above. iPhone 4S, 5, 5C, 5S, 6, 6 Plus, 6S, SE, 7 and 7 Plus.
The App is optimised for iPhone 6 and above and includes iOS9 specific features such as Widget integration and compatibility with Apple's Health app.
If you have a GPS-enabled iPad, make sure to search for Hole19 within the iPhone apps, as the app is not customised for iPad.
The Android version is optimised for devices running Android 4.4 KitKat (API 19) and above with a screen resolution of at least 800 x 480 pixels.
Hole19 runs on Android Wear smartwatches and Samsung Gear S2 and S3.
Hole19 is not compatible with Android Tablets.