All the information you need in order to determine whether or not you have an active subscription can be accessed from your device.
Here's how :
- On your device, go to the Settings app.
- Tap Your Name (Apple Account).
- Tap Subscriptions.
- Scroll the list looking for the name of the app you think might be subscribed.
If your app is listed in the Active group, you have a subscription.
If your app is not listed, you have no subscription.