If you navigate to the "Your Crunch" tab and then the "Subscription" sub tab, you will be able to see all of the possible integrations and connections your account has and could have.
Some integrations are included as soon as you sign up to Crunch, such as the integration with HMRC to allow you to submit VAT returns straight from the Crunch app.
Other integrations are also included at no cost, but require you firstly accept the Terms & Conditions. For example, to use Snap you will need to grant Snap some permissions in the Crunch app by accepting the Terms & Conditions and then clicking "Activate".
You can also use Subscription to remove integrations you no longer wish to use.