iOS
The Zing iOS app works on nearly all iPhone and iPad devices running iOS 11 or higher. You can find it on the App Store by searching for "Zing Light" or use this direct link:
https://itunes.apple.com/us/app/zing/id1344946075
(As of this writing, the most recent iOS version is v1.5.3. Updates with new functionalities and bug fixes are published regularly.)
Android
The Zing Android app works on all Android 6.0 or higher devices with Bluetooth Low Energy support. You can find the app on Google Play or use this direct link:
https://play.google.com/store/apps/details?id=fm.zing.app2
(As of this writing, the most recent Android version is v1.4.1. Updates with new functionalities and bug fixes are published regularly.)