BatLib is an Android app developed by Elekon AG, available for free in the Education & Reference category under the subcategory of Books. The app plays different ultrasonic calls of the most common European bat species transformed into the audible space with the heterodyne mixer method.

The BatLib app is an excellent tool to compare the live output produced with the BATSCANNER device for species identification. It provides a simple and easy-to-use interface where users can enter the frequency displayed by their BATSCANNER to filter species and listen to the typical bat call sequences. If the sound is similar, the app displays additional information about the bat species, including acoustic attributes, size, habitat, photos, and more.

Overall, BatLib is a must-have app for bat enthusiasts and anyone interested in learning more about bats. Its user-friendly interface and comprehensive information make it an ideal tool for species identification and education.