Buy from 'G'

If you don't know what profile to buy for the purpose of filling the gauge, you can press the G button in the middle of the gauge and it will suggest you a profile. The buying process is the same.

Click on the G icon to get a suggestion.

When you click on 'G', you get two options: you either have funds in your wallet for the price of that profile, or if you still have free tickets, you can use that to buy the profile.