1 of 5 — How it works
Phone to phone, directly over Bluetooth.
No internet, no SIM, no server in between. Open the app and it finds anyone else running it within Bluetooth range — tens of metres — and your message goes straight to their phone.
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You send "Back to the bus."
It goes straight to Ben's phone — no internet, no server, just Bluetooth, because he's close enough for his phone to hear yours.
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Mia doesn't get it.
She's round the corner, past a stone wall and forty metres of crowd — out of Bluetooth range of your phone. In today's app, that's where the message stops.
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Nothing carries it on to her — not yet.
A message that can't reach someone directly is marked undelivered on your phone rather than lost, and you can send it again once you're both in range. Passing it along through people standing in between, so it can travel further than one phone's own Bluetooth range, is planned and not built.
Reach today is direct, phone to phone. If nobody is in Bluetooth range when you send, nothing goes yet — the app marks it undelivered rather than showing a tick it hasn't earned, and you send it again once somebody is.