Has anyone seen this or tried using it?
https://www.ribbitradio.org/#/
Ribbit, is a new digital text messaging mode for VHF/UHF simplex and repeater communication, leveraging the computing power, GPS, and touchscreen interface of modern smartphones to enhance the capabilities of a simple Handy Talkie (or mobile transceiver) without requiring a cable or additional hardware. Ribbit primary focus is on emergency communications when cellular connectivity is down.