goTenna is a revolutionary communication network that allows for secure, off-grid messaging and GPS navigation for up to 4 miles. It is the only network that works completely offline, without wifi or cell service. 

It uses Bluetooth Low Energy (BLE) to create a secure connection between the device and the network, which is then used to send and receive messages. This eliminates the need for any registration, and allows for a more user-friendly experience.

With the app, you can send and receive messages to your friends, family, or colleagues. It also provides a map with the ability to share your location with other users.