You may wish to alter the length of your subscription or cancel it completely. You can do this all from your iPhone or iPad.
You can manage your subscription here: Manage Subscription.
Or you can follow these instructions:
iOS 13 or newer
1) Open the Settings app.
2) Tap your name, then tap "Subscriptions."
3) Find and tap on "Site Audit Pro".
4) You will now see details on your subscription. From this screen, you can change the option you're currently paying for, or cancel your subscription completely. Changes will take effect immediately, whilst cancellations will be actioned renewal date shown next to the app icon on this screen (which becomes an "expiry date" instead).
iOS 12 or Older
1) Open the Settings app (this is your device settings, not Site Audit Pro's).
2) Tap your name at the top of the screen.
3) Tap on "iTunes & App Stores" on the following screen.
4) Tap on your Apple ID which is shown at the top of the screen.
5) Tap on "View Apple ID" when prompted.
6) After a few seconds, you will see a prompt to log into the Settings for your Apple ID. This will be your password, Touch ID or Face ID.
7) Once you've logged in, tap on "Subscriptions".
8) You will now see a list of subscriptions, both active and expired. Find and tap on Site Audit Pro.
9) You will now see details on your subscription. From this screen, you can change the option you're currently paying for, or cancel your subscription completely. Changes will take effect immediately, whilst cancellations will be actioned renewal date shown next to the app icon on this screen (which becomes an "expiry date" instead).