Subscribe/start trial
The subscription page is the page in the funnel, coming after the install page (possibly with steps in between), in which the merchant agrees to the app’s fee. This agreement is captured by Shopify’s subscribe event, which is what Prys counts and presents as the subscribe step. For most apps that offer a free trial, when merchants subscribe, they also start their free trial period. Thus the action is usually both subscribe and start trial.
Prys counts unique subscriptions for each store. If a store subscribes, unsubscribes, and subscribes again, Prys counts it as a unique subscription.