Landeshundegesetz NRW is an educational app developed by bueffeln.net for Android devices. It is a learning system designed to help users prepare for the Sachkundenachweis test for the Landeshundegesetz Nordrhein and Westfalen-Lippe. The app contains all the exam questions from the official question catalog of the Tierärztekammer Nordrhein and Westfalen-Lippe. It is a free app that provides an efficient and easy way to learn the required material for the exam.

The app uses an intelligent flashcard system that repeats all the exam questions. The system mainly focuses on the questions that the user has answered incorrectly and repeats them until the user has a solid understanding of the material. The app also includes a Lern-O-Meter to help users track their progress and stay motivated.