【Updated: 】
You can check your subscription status following these steps:
① Tap Settings on your device
② Tap your Apple ID
③ Check your subscription status by tapping on Subscriptions.
If you cannot complete the steps above:
① Tap Settings on your device
② Scroll down and tap iTunes & App Store
③ Tap your Apple ID
④ Check your subscription status by tapping View Apple ID > Subscriptions.
Note: Display may vary depending on your OS version.