There might be slight, isolated cases where users lost their saved progress, forcing them to repeat the lesson.
In order to reinstate your progress and let us know exactly what happened, please email us with a detailed description of your issue. Try to provide as much information as possible so our support team can better understand your issue. We will get back to you within 24-48 hours to help resolve it!
We are working hard to make sure the app is always stable and this is avoided.