Online Leren - KleurRijker is a free Android app developed by KleurRijker, designed to assist non-native speakers in learning Dutch for integration, employment, and State exams. The app features comprehensive language learning programs that provide free access to the complete online learning platform for practicing and reviewing.

The app offers a wide range of exercises, vocabulary, and grammar lessons that are grouped into various categories such as reading, writing, speaking, and listening. It also provides an option to practice Dutch language tests, including the Inburgeringsexamen and Staatsexamen. With its user-friendly interface and interactive features, learners can easily navigate through the app and learn Dutch at their own pace.