Which app is good for traveling to Korea?

Go to Korea. If you go shopping, you can choose to go to Seoul. If you travel, you can recommend Jeju, which is quite good. As for app, it is more convenient to buy air tickets and recommend Spring Airlines mobile phone client, and there will be preferential activities from time to time. It's more affordable and the ticket price is very cheap. You can see Ctrip or Yilong Hotel when you buy a hotel, and you can see ponytail strategically. That's about it.