Mistakes happen all the time, as it is not always easy to keep all functionalities working 100% in all versions of iOS and Android, and in all models of mobiles and tablets. We apologize for that. We would love if you could help us to fix those errors! Please reach us through our support channel: Email us at support@poikilingo.com. If possible, share screenshots or videos with us, as that can help us to fix errors faster. If the technical problem you are having is preventing you from using the app, contact us so we can give you a coupon to extend your subscription period and compensate the time it cannot be used. You can always cancel your subscription directly through the app stores.