1, the appearance is different: d2a, a little genius phone watch, is designed with cartoon image, which is more suitable for younger children, while q2a is designed with simple style, which is more suitable for older children.

2. Different functions: d2a, a little genius phone watch, mainly focuses on early education and enlightenment, and has many functions such as mathematics, English, music, poetry and science, while q2a focuses on the improvement of language learning and reading ability, and has functions such as reading and writing in Chinese and English, and voice recognition.