CanTONEse is an App which aims to provide Non-Cantonese native speaking students with an online learning platform to enhance their Cantonese learning. Instead of helping the non-Cantonese native students memorize the tone of every character, the app try to emphasize the general difference between 6 Cantonese tones. Teaching materials with recordings, self-assessment exercises, daily conversations and an interactive game are available in the App.