You can cancel an app from the app store. Click Apps and Integrations > App Store > locate the app > click Cancel.
Cancelling will prompt our Success team to follow up with you to learn your reasons for cancelling. This helps us improve the product to meet your needs.
We may also make suggestions for your specific use case just to make sure you've considered all avenues to leverage the feature. Each App has many use cases and we want to make sure your aware of how each one can help you automate your business, and promote growth while paying for itself.