YOo
Install YOo
YOo runs on iPhone and Android. It is free, and there is nothing to pay for inside it.
You need WhatsApp to sign up
Your one-time code arrives as a WhatsApp message on the number you are registering. A number without WhatsApp cannot finish registration — there is no SMS fallback. Have WhatsApp working on that number before you start.
Where to get it
App Store
Google Play
For phones without Google Play
Installing the direct download
If you install the .apk yourself rather than through Google Play, Android will warn
you that the file comes from outside the store and ask you to allow it. That warning is normal, and
you should take it seriously everywhere else: only install a file you got from us, over HTTPS, from
this website.
We publish a SHA-256 checksum beside every download. If you can, check it before installing — a file whose checksum does not match is not the file we published, and you should not install it.
Direct installs do not update themselves. You will need to come back here for new versions.
Setting up
- Open YOo and enter your phone number in full international form.
- Complete the short check that confirms you are a person.
- Read the six-digit code from the WhatsApp message and enter it.
- Choose the name and photo other people will see. Both are encrypted.
If the code does not arrive, the questions page covers the usual reasons.
Before you rely on it
There is no backup. YOo has no PIN and keeps no copy of your messages. If you lose your phone, the conversations on it are gone. This is a deliberate trade: we cannot lose what we never held, but neither can we give it back. The privacy policy explains what we do and do not keep.