Kaynac has no passwords. You sign in with one of the methods below.
Sign-in methods
- E-mail link: we send a sign-in link to your e-mail. It is valid for 15 minutes and works only once. The same e-mail contains a 6-digit code you can use to sign in on another device.
- Apple
- Phone number: enter the SMS code sent to your number.
Step by step
- Choose a method on the sign-in screen.
- If you chose e-mail, type your address and check your inbox.
- Tap the link, or enter the code in the app.
Existing members
If you sign in with the e-mail you used in the previous Kaynac, you land in your old account.
Linking several methods
Under Settings > Sign-in methods you can add more than one method to the same account. The last remaining method cannot be removed, so you never lose access.
Signing out other devices
Use "Sign out other devices" in Settings to close sessions left open elsewhere.
Common questions
The link does not work. It may have expired (15 minutes) or already been used. Request a new one.
I cannot open the e-mail link on my phone. Use the 6-digit code from the e-mail instead.
Updated 23 Oct 2026sign-ine-mailgoogleapplesmssessions