If your credit is starting to run low, you can easily top up in 1, 5 or 10 hours blocks and the credit card on your account will be charged.
For set and forget credit management turn on the auto recharge option. This will automatically top up your account with 3 hours when credit falls below 30 minutes.
To see a step by step guide on how to purchase more credit, see the video below:
Buying credit from Crowd Convergence on Vimeo.