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Yes. Currently the App is for free. It is a prototype to test the auto-flashcard creation.
Yes. A follow up is already in the production process. It will have lots of features for a better user experience.
The translation is based on the free google_translate 0.0.6 API. It is an old version and the translation should be checked with a newer version or with a dictionary. If you have the feeling that it is necessary to verify the quality of the translation then do so. It will enhance your learning process
The autoflash-card app creator is based on Android 6.0 and higher. It is only for Google Chrome, Mozilla Firefox and Opera.
Everything is stored on your device. We do not take any data from you. Therefore be careful, if you delete the App or uninstall it, all your flashcards are gone also.