Can I add capacity mid-subscription?

Yes, at any time.

You can do this on the Billing page of the RealVNC Connect Portal. The Billing page can be accessed using the person/profile icon at the top right of the portal after logging in.

You can choose to upgrade to another subscription tier, and add devices and/or users depending on your subscription model.

Note, If you are on one of our legacy subscriptions you will only be able to upgrade to another tier at your renewal date.