With a message sent to your email. The sign-in email is in Finnish. It contains a button (“Kirjaudu sisään”, Sign in) and a one-time code – either works. There is no password at all. The code is handiest when you read your email on a different device from the one you are signing in on.

First check your spam folder – the message is sent from kirjaudu@tuntitassu.fi. If the message does not appear, request a new one on the sign-in screen. Note that a new message invalidates the previous one: in the app’s own words, “The link and the code in the previous message stopped working at the same time”, so always use the code from the latest message.

The code can only be used once and expires fairly soon. If you have requested several messages, only the code in the latest one works. If needed, request a new message and enter its code straight away.

Yes – the app is designed phone-first and works in the browser, with nothing to install. The same account also works on a computer.

In English, Finnish and Swedish. You can change the app language in the user menu in the top bar under “Language”, and your choice follows your account from one device to another. A new account opens in Finnish – the item is then called “Kieli”; press EN.

Yes. From the app you can download your entries as a CSV file for a spreadsheet and all your data as a JSON file (“Settings and backups” → “Export and back up your data”). You can create PDF reports at any time to attach to your invoices.

With the same email address you use for the app: request a code on the sign-in page and enter the code from the email. Signing in here is separate from the app, and your session stays active here for 30 days.

By email at tuki@tuntitassu.fi. Tell us in your message which email address you use for TuntiTassu, so we can look into it more quickly.