In addition to yearly subscriptions, we currently offer a one-off purchase to access the PRO content called Lifetime access. Everything the app has to offer, you'll be entitled to use it for 100 years!
If you're wondering about your membership status, you can verify it under Profile/Settings (iOS devices) or in your order history (Android devices). If it reads Lifetime, you can use the PRO content for an entire century.
Feel free to contact us at email@example.com if you have more questions!