Bookem lets you manage your subscription. Whether you'd like to upgrade or downgrade plans, you can do it all yourself.
1. Go to Settings > Account
2. Navigate to the Settings tab
3. Here, you can change your plan or cancel your subscription.
4. If you decide to change your plan, two of the following scenarios will happen:
If you downgrade, you will be charged the fee for the downgraded plan on your next invoice.
If you upgrade, your next invoice will include a prorated charge for the remainder of the current month, in addition to the increased subscription fee for the forthcoming period.