Features
One price, every feature, for everyone on the plan. Here is the whole list — what each thing does, and the small choices that make it yours.
The map
Each person as they move, with speed and battery — and which of their devices the map is following, when they carry more than one.
Ten days, written the way you would say it: "at Home 8:12 – 4:40, then a 22-minute drive to School." Tap a journey to see the route it took.
Turn-by-turn from where you are to where they are right now, spoken aloud, with turn arrows, the full list of turns, and rerouting when you miss one. Radius's own routing — no mapping company, nothing per trip.
Yours — Home, Work, School: others see "Alex's Home", you see "Home". Someone's house or work — "Casey's House", named for that person. A business or spot — "Walmart Supercenter", found by typing the address. The app asks which, and tidies the name for you.
Every place says who it is shared with: only you, chosen circles, or everyone who can see you. And on your side, any of their pins can be taken off your map, one at a time.
For any place both of you can see: "tell me when Alex arrives at Alex's House", "tell me when Sam leaves Work" — separately, per person, per place. Real notifications with their own times, and every arrival and departure is kept, so Activity on the web (or a phone that was off) shows "Alex arrived at Home · 3:12 pm" afterwards. Mute somebody and everything about them goes quiet, this included.
Where each person is, the weather there — "77°F, chance showers" — under their name, from the National Weather Service. And when the Service issues a warning or watch (tornado, severe thunderstorm, flash flood, blizzard, extreme heat or cold, hurricane, and the like) whose area contains someone you can see, or comes within ten miles of them, you are told — everyone you can see who is in the same alert named together: "The National Weather Service has issued a Tornado Warning for Lake County, IL. Sam and Alex are inside the area it covers. Make sure they are all safe or seek shelter." Once per alert; loud. Your own alert for your own location always comes; people you have muted are left out of the other one — a mute means nothing about them, weather included.
Optionally, the track under your name — Spotify, YouTube Music, Amazon Music, a podcast, any player. Nothing to connect and no account linked: the phone already knows what is playing, and Radius shows the title. Tap it on somebody else's name and it opens in your player. It scrolls when it is long, and it goes away when the music stops.
The watch reports on its own. Leave your phone at home and the map follows the watch; the map says which device it is following, and its battery.
Sign in on the web from any browser: Account lists your devices with where each last was, and Ring it makes one sound at full volume for a minute — silent mode or not — with a Stop button on its screen. Only your own devices, ever.
Talking
Photos and video from the gallery or taken on the spot, documents, reactions, replies, search, and a shared background you can both set. No group chats, by design.
Empty circle: sending. Circle with a tick: the server has it. Filled circle: their phone has it. Their face: they have read it. Delivered the moment their phone actually receives it, not when they happen to open the chat.
Messages leave the server after two weeks. Tap Keep on a conversation and it is saved on your own phone as it arrives — or moved to your own Google Drive, and the phone gets the space back.
Phone to phone when the network allows, through Radius's own relay when it does not — and the screen says which. Never recorded. A voice call looks like a phone call: their picture, a timer, mute · hang up · sound.
Your ringtone, with the app open, closed, or the phone locked. Android's own Answer and Decline on the lock screen — you can pick up without unlocking. Someone you have muted cannot make your phone ring.
Switch to another app, lock the phone, let the screen sleep — the call carries on, mic and all, with a Hang up in the shade. Tuck it away with one tap and use the rest of Radius while you talk. Earbuds are used the moment they connect; one button cycles earpiece, speaker, Bluetooth, headphones.
Your family
Install, sign in, and your family plan exists — free for thirty days, with room for three more. Add people from your list, or type an email address or phone number and they get the app, sign in, and are on your plan with nothing to approve.
Everyone on your plan sees you, and you see all of them. Whether they see each other is your circles: two people on your plan see each other only while you have filed them into the same circle. Sam files Alex under Partner and Riley and Jo under Kids — Riley and Jo see each other and Sam; Alex sees only Sam. Everyone you add starts in Family, together, until you sort them. Their own circles are their own filing and change nothing.
Somebody on your plan can run their own family too — for their partner, their kid — at $1.99 for up to four. Their people see them, not you. That is how a family becomes families, each private to itself.
Sort people so some see less of you: where you are, where you have been — or pause a whole circle for a while. Nobody is told which circle they are in. Circles are also how the map is filtered — yours to arrange however you like.
Outside a family plan, a code raises a request with a name and a face, and nobody appears on your map until you say yes. Sharing is mutual: anyone who can see you can be seen by you.
While Radius shares your location a notice sits in your notifications that cannot be dismissed. There is no hidden mode and no way to be watched without knowing.
Where it works today
Positions, messages, calls, places and arrival alerts work wherever the phone works. Nothing about them depends on where you are.
The map is drawn from Radius's own copy of OpenStreetMap covering the United States, Canada and Mexico. Outside that the dots still move; the streets under them do not draw yet.
Typing "Walmart 62701" or a street address to save a place finds it anywhere in the US, on Radius's own server. Other countries: drop the pin on the map instead.
Spoken directions run on Radius's own routing, covering all fifty states — no mapping company, nothing charged per trip. Outside the US, the map still shows where everyone is; it just cannot drive you there.
The app is for Android phones and watches (a Google Play listing is coming; an iPhone app is planned once Android is fully settled). Anyone without an Android phone — an iPhone, a computer — can still sign in at radiusfamily.com/app: the map, messages, arrivals and departures, history, severe weather, the family plan and find-my-phone all work there. What a browser cannot do is report where you are, so a family should switch when the people it wants to see have Android.
The app, the directions and this site are in English. Other languages are not yet on the roadmap.
Your account
Google, or a code by email — and two-factor if you want it. No passwords to invent. On the web, the same map and the same messages in a browser, behind a code from your own authenticator app — Google Authenticator, Aegis, 1Password, whichever you already use. On the web, Account lists every device signed in and any one can be signed out from there. Your family plan is managed in the app under Settings → Family plan; the card and receipts are on Stripe's own page. And deleting your account deletes everything, files off the disk, no questions.