If you would like to update your 7shifts subscription from monthly payments to annual payments, you can do this directly from the web app at app.7shifts.com.
Here's how you can update your billing frequency in 7shifts:
1. Head to your profile picture at the top right of your screen and select 'Billing & Plans.'
2. Next, click on your subscription.
3. Click on 'View plans.' 
4. Next, click on the toggle near the top of the page to enable the annual billing option. You'll know you've done this correctly if the color of the toggle changes to orange.
5. Finally, you will need to confirm the desired plan for the account going forward.
Your annual invoice will be processed immediately after you've confirmed your plan. The remaining balance you had for the current month's subscription will be prorated as a discount on this next invoice.