Hopefully, we have answered any questions that you have below.
Repeaterbook. We utilize the data available via Repeaterbook's public API. The list of repeaters is synchronized periodically.
We only list FM analog repeaters broadcasting from the United States (for now!). We exclude any repeaters that are not open to the public, and known to be On-Air.
We love GMRS, and would like to integrate GMRS repeater data into our service. The main downside of GMRS, given our mission, is that the repeater network is much smaller than what is available to HAM operators. There are currently 20,000+ amateur radio repeaters in the U.S. alone.
We consider utilizing digital modes to be more of an advanced/enthusiast activity. We could be wrong here, but given our mission, we believe our audience will be more interested in HAM radio for communication, not as a hobby. Thoughts???