The cards in the app revert back to zero, can a developer help?

Hey! So I just started learning Spanish and so far it's been great except since yesterday the cards I do will randomly revert back to zero in the middle of an exercise. The words I've learnt in that session get unlearnt (removed from the history altogether) and ofcourse the daily goal can never be reached. What should I do?

It happened to me too. Just switch between languages that you are studying. You might also try cleaning the cache from the app in the device settings. This bug just happened to me once. I almost went mad. When it finnally accounted for my cards, I had reached more than 300 cards in a single day, trying to make it reach the 100 achievement.

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