This app is a great option to kill time while learning some scattered words and non-sense sentences. I can't tell how effective it is since I gave a try on Dutch not finding it really challenging since I speak English and German. It, obviously, helped me understand the 20 words used to recycle like 300 activities. Recycling is way exaggerated and most of the sentences are odd (even in the translation). As far as languages approaches go, this app would have been marvellous 70 years ago.