The Flexi plan comes with minimal commitment, meaning you are only committing to 5 days at a time, with automatic renewal. You can even cancel the days that you have paid for, as long as you give us 2 full business days notice. If you let your plan roll over, the payment will be taken each Wednesday.
The Commit plan offers fixed-term plans with discounted pricing for longer plans. You can cancel these plans at any point as well, but there will be fees associated with the cancellation.