Open Repeater Map

A free and open source Repeater Book interface with Open Street Map map tiles.

NOTICES

This application is not available on any application store, nor will it be without the prior, explicit approval of the maintainers of Repeater Book (if you are one of these people, see this section).

This has been developed first and foremost for Android as a proof of concept. Flutter offers cross platform support, so if the application is validated and moves forward, we'll focus up on iOS support, but for now expect it to look like a debug build on iOS and a prototype on Android.

If this application is published on any application store, it will not ever be a paid application in any form, it is free as in price and free as in freedom.

Features

Includes a local document containing all of the repeaters found on repeaterbook as of late January, 2026, though it is reasonably compacted to CSV (~3.4 MB). This ensures repeaters are always available, even while offline.

Uses Open Street Map tiles with local caching for visualizing their locations. This generally requires an internet connection, though up to 1GB will be cached and replaced as requested by the Open Street Map provider.

Repeaters on the main list can be searched for by callsign, county, nearest city, or state.

Repeaters on the main list can also be filtered by their operational status, usage retrictions, and frequency band.

Build Instructions

Connect Android to computer over USB and enable USB Debugging

Get device ID with adb:

adb devices
# List of devices attached
# emulator-5554 device
# ...           device

Build Flutter application:

Replace device_id with the device ID above.

flutter build apk -d device_id --release

Install the application:

adb install ./build/app/outputs/flutter-apk/app-release.apk

For Repeater Book Maintainers

First, thank you for maintaining Repeater Book, it's a super helpful resource as a new ham operator without many connections to the community yet.

Second, I dont have access to the apple or google app stores on my current phone, nor could I find the source code for the existing mobile app anywhere. I wrote out this app as a prototype for an open source version which could operate without location or internet services and could optionally display repeaters on a map.

Third, if you have the time, I'd love for you to check out this app. Relevant source code is in the ./lib directory & data is in ./data. Flutter can be tricky to set up but if you already have an updated mobile development environment it should be fairly straight forward.

Finally, if you're open to making the existing app open source, I would love to spend some time contributing to it. If you prefer not to, then I'd like to ask for your permission to continue work on this application, publish it to the respective app stores (ideally, iOS, Google Play, and F-Droid), and discuss potential for some kind of streamlined feature on the Repeater Book API for publishing changes to the Repeater Book. This application will never be monetized in any way, nor will I impose or attempt to funnel any donations from it, I simply want for this to exist.

Should you decide against open sourcing your application and against creating some kind of streamlined system for getting repeater list updates, this application will live here and I will just periodically update the CSV file of the aggregated repeaters so I can create local builds for myself or for anyone else who finds this repository. The application itself does not interact with the Repeater Book directly, so there should be no increased load on the servers correlated with the number of people running this application.

Thank you for your time. You can reach me through the social platforms listed on my website or on an issue opened on this repository.