Nature Mobile - Android Apps

I was wondering has anyone used Apps from Nature Mobile on Google Play?

https://play.google.com/store/apps/developer?id=NATURE MOBILE GmbH&hl=en

They seem to have a wide range of ID apps such I Know Birds, I Know Mushrooms, some are still in German but the English ones seem quite detailed.

I have tried some of the trials they have (Lite Versions) and the amount of detail seems to be good and the way you work through trying to identify something by going through a series of identifiers also seems to be quite good. The bird trial version contains the alarm call, song and call for some of the birds, which I thought was real handy.

Hopefully someone else out there has tried these apps and has some comments about them.
 

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