Terms of use

Effective October 1, 2026.

3ka is a free online booking service for personal trainers and other specialists, with a chat between the specialist and the client. By using the 3ka app or website you accept these terms. They are short, so please read them.

The service

A specialist opens their free time in 3ka, a client picks a slot and books it, and they sort out the details in the chat. The specialist runs the sessions: 3ka does not provide fitness services and is not a party to arrangements between a specialist and a client, including payment.

Free

3ka is free for specialists and clients. The app has no payments, subscriptions, in-app purchases or ads. A service price, if a specialist shows one, is for information only.

Your account

You sign in with a one-time code sent to your e-mail, with no password, so keep your mailbox secure. Use your own name and do not pretend to be someone else.

Your content

Messages, photos, your name, avatar, page description and anything else you post in 3ka are your content, and you are responsible for it. Post only what you have the right to post. You allow us to store your content and show it to the people it is meant for: the other person in a chat, clients on a specialist's page.

A sent message cannot be edited or deleted, so think before you send.

Zero tolerance for objectionable content

There is no place in 3ka for abuse or for users who abuse others. Do not post or send: insults, threats, bullying or harassment; hate speech or content that demeans people for any reason; sexual content or unsolicited intimate photos; violence; spam, ads or scams; other people's personal data without their consent; anything illegal.

If you break this rule, we remove the content and block your account: a blocked user can no longer sign in to 3ka and their booking page is hidden. The server automatically replaces crude swear words in chat messages with asterisks.

Reporting and blocking

You can report any chat message: touch and hold it, then choose Report. The moderator sees only that message, not the whole conversation. You can block the other person from the chat menu (••• → Block) or right when you report: after that, neither of you can message the other, and bookings stay as they are.

We review reports within 24 hours. If a report is confirmed, we remove the message from the conversation for both sides and block the author's account. To report a specialist's page or anything else, write to dt@3ka.ru.

Bookings

When you book, you agree a time with the specialist. You can cancel a booking in the app or through the private link in your e-mail until the cancellation deadline the specialist has set. The specialist is responsible for keeping their schedule up to date.

Deleting your account

You can delete your account at any time: Profile → Delete account. What happens to your data is described in the Privacy policy. We may block or delete an account that breaks these terms.

Liability

We work to keep 3ka running smoothly, but the service is provided "as is": interruptions and errors are possible. We are not responsible for what users do, for the content of their messages or for the sessions themselves.

Changes to these terms

We may change these terms. The current version is always on this page, with its effective date at the top. If you keep using 3ka after a change, you accept the new terms.

Contact

Send questions, complaints and suggestions to dt@3ka.ru.