I use the software suggested by my teacher, which is a set of gladiator English series. I can learn words, phonetics, grammar and spoken English. For example, I can recite words, and there are synchronous words in the textbook of Beijing Normal University. I can specify how many words I recite every day, and I will automatically remind the reviewed words according to Ebbinghaus forgetting curve every day. If it is an unfamiliar word, I will repeatedly ask for memory until I know it. There is a dictionary with word lookup. Words that can't be found, saved and reviewed at any time can also be made into mp3 players. You can look for Gladiator English software. I love memorizing word 9 (note that it must be flyenglish of Gladiator series). Download it and try it. It was developed by the teacher of Peking University. The mobile version can be studied at any time, which is very convenient and can be synchronized with the computer version. You can find it on Taobao.