App picture is a tree. What's the name of this English software?

Dashu English APP. Dashu English APP is a mobile phone application software that focuses on helping users learn English. A rigorous teaching plan is tailored for users, and a large number of excellent English training courses are provided for users, which can help users learn English in an all-round way, improve their English level quickly, and strive to help users improve their English learning performance in an all-round way.