If you've created an account, you can view any transactions you've made through your Revv account by visiting app.revv.co. Select the Donation history option from the menu. Here, you can see a list of all of your donations you've made through your Revv account. A green icon next to the donation amount signifies that the donation was recurring.
Note that you cannot view your donation history if you haven't set up an account. You also can't view past donations if they were made before you created an account or if you made them while not logged in.