NABU Siegel-Check is a free lifestyle app developed by Naturschutzbund Deutschland NABU e.V. for Android users. It helps users shop ecologically by identifying environmentally-friendly products through product logos. The app provides short and informative reviews to help users recognize the environmental benefits of each character. It makes shopping easier and provides quick orientation on-the-go.

With the flood of logos and seals that often complicate rather than facilitate a clear view, the NABU Siegel-Check app provides an overview of trustworthy characters in a sealed gallery. Users can filter by product group and search for seals for different product categories. The app's database includes identifications that are nationwide to find in the supermarket or in stores and where customers could suggest an ecological benefit.

The app's functions include photographing the product label, automatic detection of the seal, information and reviews of the logos, overview in a sealed gallery, search function, and filter by product group. However, the seal of recognition by photo only works with smartphones and requires an internet connection. The photo should be as sharp as possible for the app to function effectively.