OFO Account sign-in
Other sign-in options
Connect existing wallet
Questions
What does it cost?
The first 30 days after you sign up are free. After that a call costs 0.2 USD per minute, paid from a USDT balance. Creating a room reserves the chosen time; unused minutes return to your balance when the room ends.
How do I get calls when OFO is closed?
Open Account and balance → Incoming call alerts. Phones with Google services: tap "Turn on push alerts" and allow notifications. Phones without Google services (most mainland China models): tap "Turn on always online" and allow notifications and background running. Do it once on each phone; after that a call rings even when OFO is closed.
Does the other person need an account?
No. Guests just open the invite link you send them. No sign-up, no wallet, no email.
Is it private?
Calls are encrypted end to end. The audio key lives only in the invite link, so the server cannot hear anything. Guests can also disguise their voice on their own phone.
When is a room destroyed?
A two-person call ends when time is up or either person hangs up. A group call ends when time is up or 120 seconds after everyone leaves. The room and its keys are then deleted.
How many people can use one link?
One. Each invite link admits exactly one person. In a group call, create one invite per participant.