Do I use my business or personal e-mail address to register in the app? Both work - you can use your private or business email address. Related articles Can I change the email address linked to my Mobility Budget? Can I give my Mobility Budget to other persons? How does the Mobility Budget work with FREE NOW (formerly mytaxi)? Do I have to re-register every month? Why do I have to provide a payment method even though I will use my Mobility Budget?