APP operation: listen to cow > fire rabbit, mibao rabbit > Barbie.

Learn early education: listen to the cow > Biba ≈ fire rabbit, Mi Bao rabbit

Fire Rabbit and Mibao Rabbit are ordinary traditional story machine, and their resources are not as rich as those of Ba and Niu. Niu Ting has also deeply sorted out the resources and constantly updated new resource contents. Niu Ting also cooperates with many publishing houses, and has many independent recording and copyright licensing resources.

Niuting and Bibi have independent apps, which can be remotely controlled after pairing, while Mibao Rabbit and Huohuo Rabbit are bound to WeChat control, which is not as convenient as APP and has no more functions.

In learning early education, Niu listens to the unique enlightenment course, which can intelligently schedule and realize the regular broadcast of the enlightenment course every day. And this is what none of the other three have.

To sum up, cattle are the best to listen to.