There seems (似乎) to be apps (手机应用软件) for everything. And mobile apps have been a part of (一部分) our life. The following apps are part of the most popular ones.
Ctrip can be a helper when you feel it's hard to buy train or plane tickets. You can buy tickets anywhere anytime.
Ximalaya Reading has lots of books including (包括) poems (诗歌), short stories, novels (小说) and even fairy tales for children. You can listen to books online. You can also download book recordings (录音).
BabyBus is a very good friend for children under three years old. Kids can learn to speak, understand numbers and draw pictures with the help of this app.
Word 100 can help us learn English when you're playing games. So if you have problems (问题) in remembering the new words when you learn English, use it!