Log into your account https://app.flow.rent/
Go to the top right hand side of the screen to Upgrade to Pro. You can also use the left menu and click last item for your profile settings.
Select Upgrade to Pro.
Select number of tenants you have using the slider. Your landlord can also select to be billed annually for a discount. Once done, select Purchase Pro.
You will be shown the pro rata charge for the current month on the left hand side. On the right hand side, enter your card details.
Once payment is processed you are subscribed. As long as you are connected to your tenant you will now unlock MAX discount for your prepaid purchases and rewards.
Billing thereafter is on a monthly basis and you can cancel anytime,