Mauvio has 2 in-app purchase options:
1-month of unlimited exports (without end-screen promo video)
1-year of unlimited exports (without end-screen promo video)
Mauvio’s subscription is non-recurring, which means that when the 1 month or 1 year period ends, the subscription plan will not automatically renew.
If you wish to receive a refund for your in-app purchase, please follow the instructions in the following Apple Support article: Request a refund for apps or content that you bought from Apple