Berkanan

Berkanan is an app that provides a convenient way to communicate in areas where cellular connectivity is unreliable or unavailable. It supports group messaging as well as secure, private, one-on-one conversations and audio calls over Bluetooth. The maximum distance for these calls and messages is around 50 meters, but they can be extended further by going through other users' devices if they also have the app installed. Berkanan is available for download on the Apple App Store.