Wow. Will this be compatible with bitchat, or just simply better than bitchat?
On https://geogram.info you find the ongoing development of an app for exchanging messages using BLE, radio waves or the internet.
The development started about an year ago on ESP32 and Android devices and after many experiences it is finally becoming available. Small previews were published earlier like this example: https://primal.net/e/nevent1qqswe3t8xlr3ted45hks7wj2mz65q0njh4pwfns6s57ly4ahapnellg0vujn7
NOSTR is used by default for authenticating messages and identities, will incrementally grow to become a fully compatible relay.
I'm publishing first the web app (my apologies are not yet fully working) and then you should see the Android version following soon after. The ESP32 version (fixed station) comes last once the format/protocol is settled because development there is the hardest.
If you'd like to test and provide early feedback, just head out to the site and try things. Around October the site should be fully running.
Discussion
If there is interest, can likely add compatibility.
Would need to look on how bitchat is talking BLE. From my previous experiences on Android had to use a different method to make sure the smartphone wouldn't block BLE.
On geogram BLE is exchanged on a quite unique manner to overcome limitations on message throttle.