Rilo

Let your child chat and call with the friends and family you choose.

Voice calls and messages between children aged roughly four to ten and the people their parents choose. A contact starts with a one-time invite from a grown-up, and every one of them is approved by a grown-up on both sides before it exists.

Calls are encrypted end to end between the two devices. This server links them and nothing more. It cannot see or hear a call, and it stores no contact list.