Hello, we are building web app that uses Shopify API to fetch information about customers. So, every merchant can signup and connect their store to our app and see and manage customer’s purchases. Also they can communicate with customers via different channels (email, instagram, facebook etc).
The question is can this app be classified as custom(e.g. there is no need in App Review)?
Answers from support where not clear to me, because some say that in order to work with multiple merchants we need to go though the app review process and others say the opposite.
Can you clarify this question for me?