Security
Radius sits behind Cloudflare, the network that fronts a very large share of the web and the same protection relied on by major banks, governments and technology companies. Every connection is encrypted and filtered at their edge, and the server's real address is never exposed — so it cannot be attacked directly.
This website counts visits using Cloudflare's analytics. It is cookieless, does not fingerprint your browser, and does not follow you to any other site. That is the whole of it — no advertising, no ad networks, no data brokers, and nothing at all inside the app itself.
Being straight about this matters more than a slogan. Your messages and positions are stored on Radius's server — that is how a message reaches somebody whose phone is off, and how a map has anything to draw. They are deleted on a schedule: locations after 10 days, messages after 14, and you can delete the lot at any moment. Keeping a conversation for longer is your choice and happens on your device or in your own Google Drive.
Two things never touch it: calls go straight between phones, and the map is drawn from data on Radius's own server rather than a commercial maps API, so no mapping company is told where you are.
What we store
Every location app stores your location — it has to, or there would be nothing to show your family. The question worth asking is what is kept, for how long, and who else gets it. Here is ours in full.
| What | Kept for | Then |
|---|---|---|
| Where you are, and where you have been | 10 days | Deleted automatically |
| Messages, photos and video | 14 days | Deleted automatically |
| Your account — name, sign-in address, photo | Until you delete it | Gone the moment you do |
| Security log — sign-ins and device changes | 90 days | Deleted automatically |
| Your calls | Never stored | They never reach the server at all |
| What the map shows you | Never sent anywhere | Map tiles come from Radius's own server |
Open a conversation and tap Keep, and every message is saved on your own device as it arrives — so you still have the whole thread after the server has let go of it. Nobody but you can read that copy. If you would rather it survived losing the phone, you can move it to your own Google Drive instead, and the phone gives the space back. One or the other, and it is your choice, on your device.
One button in Settings removes your messages and photos, your location history, your places, your circles and every connection — with the files taken off the server's disk, not merely hidden in a database. It asks twice, because it cannot be undone.