Chant Tools is a free Android application designed for users interested in Gregorian Mass propers and ordinaries. This utility provides offline access to a collection of chants, primarily sourced from the Liber Usualis and transcribed on GregoBase. The app is particularly useful for those looking to engage with traditional liturgical music without needing an internet connection. It includes various Mass propers, making it a valuable resource for both personal and communal worship.

While the app serves as a convenient tool, users should be aware that some chants may contain inaccuracies. The application encourages users to report and correct any mistakes they encounter by utilizing the GregoBase platform. This collaborative approach not only enhances the app's reliability but also fosters a community of users dedicated to preserving the integrity of Gregorian chant.