Pay-per-minute is only available in Vantaa. You will need the Vantaan kaupunkipyörät app, which you can download from the AppStore or Google Play.
You will be charged an initial fee of EUR 1 and EUR 0.10 per minute. The maximum time of use is five hours at a time.
Download the "Vantaan kaupunkipyörät" app
You can download the "Vantaan kaupunkipyörät" app from the AppStore and Google Play for free. NB! The app is only available in Finnish.