How Radius works for anyone under 18.

The short version

• Age comes from the date of birth on the profile. A birthday typed later can't move someone from one side of an age rule to the other.
• A minor can install Radius and sign in, but the account stays inactive until a guardian adds them. For a child under 13, the guardian must also be verified and consent.
• We collect the same short list as everyone and nothing extra. Positions are kept 10 days, messages 14 days, and diagnostic reports 90 days.
• There's no advertising, no third-party analytics, no algorithmic feed and no stranger contact. A minor only sees and is seen by the people their plan manager connected them with.
• The plan manager decides who each person on the plan can see and message, and can change or end any of it at any moment.
• Sharing is never invisible. The minor's own phone always shows that sharing is on.

This summary is here to help. It isn't part of these disclosures for minors. The full text below is what counts.

How age is determined

Every profile is set up with a date of birth, and it is the date on file that governs — a birthday typed later cannot move somebody from one side of an age rule to the other. A minor can install Radius and sign in, but the account is inert — no trial, no price, and for an under-13 nothing collected — until a guardian adds them, and for an under-13 is verified and consents. On Android, Radius also records the install identifier from Google Play's age-signals service for supervised child accounts.

How the parent is linked

The adult who sets a minor up is recorded as their guardian on the account itself, not as a convention. The guardian and the minor are on the same family plan, the guardian's agreement is the one on file (a minor's own signature would be legally voidable, so we do not collect one), and for a child under 13 the guardian must additionally be verified as a parent — see children's privacy for how.

What is collected from a minor's account

The same short list as everyone, and nothing extra: position while sharing is on (kept 10 days), messages to their family (kept 14 days), profile name and photo, named-place arrivals, the phone's step counter (only to tell a walk from a drive, never anything about their health), and a diagnostic report if the app crashes or a request fails (kept 90 days). There is no advertising, no third-party analytics, no tracking library, no algorithmic feed, no stranger contact — a minor can only ever see and be seen by the people their plan manager connected them with. Data minimisation here is not a policy layered on top; it is that the extra data never exists.

What the parent controls

The plan manager decides who each person on the plan can see and message — including the minor — and can change or end any of it at any moment. The manager sees the minor's map, history and places by the same rule as the rest of the family, and can remove a minor from the plan at any time, which ends the sharing both ways. A guardian can have the minor's account deleted, and for an under-13, withdraw consent and stop collection immediately. What the manager cannot do is make sharing invisible: the minor's own phone always shows, at all times, that sharing is on — a notice the app cannot switch off.

What a minor keeps

The permanent sharing notice on their own phone; the ability to see exactly who can see them; and messages that are theirs — private to the conversation, not shown to anyone outside it, with the same retention as an adult's. Radius is built on the belief that a watched child should always know — safety that requires secrecy from the child is not safety we sell.