How it works
When you start an Off-the-Grid session, the two phones build a short, private radio link directly between themselves. Your voice never leaves that link — no servers, no Wi-Fi router, no mobile network.
It does not use your internet connection. You can be in the middle of a forest, on a boat, or in an underground car park. As long as the two phones are close enough, Whispr just works.
How far does it reach?
Range depends on what is around you:
| Environment | Typical range |
|---|---|
| Open outdoors (park, field, beach) | Up to about 200 m / 650 ft |
| Indoors with a few walls | About 30–80 m / 100–260 ft |
| Crowded or noisy radio environments | Closer to 30 m / 100 ft |
Voice quality
Off-the-Grid Mode is tuned for clear, low-delay voice — the kind of crisp speech you want from a walkie-talkie. It is not designed for streaming music, but voices come through naturally and clearly.