Trademark registration covers forty-five categories. Generally speaking, APP needs to register for categories 9 and 42. Category 9 is mainly about the sale of finished software; Category 42 is mainly about the development of APPs. If the APP developed is a platform for buying and selling goods, it is recommended to register for category 35. One product is to provide an online trading platform for providers of goods and services; if it is a medical service provider, it is also necessary to register for category 44. If it is a dating service There are also 45 categories that need to be registered.