Buka App Store. Sentuh Search di kanan bawah layar. Pilih aplikasi yang diinginkan. Sentuh GET yang terdapat di samping kanan aplikasi yang diinginkan. Sentuh OPEN. Sentuh Allow. Sentuh SIGN IN yang terdapat di bagian bawah layar. Tambahkan akun Gmail. Sentuh DONE yang berada di pojok kiri atas.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
It's a blue app that contains a white "A" inside a circle. Then tap the "Search" field at the top of the screen and begin typing "Gmail". As you type, apps will be suggested on the screen below the "Search" field. Both Gmail and Inbox by Gmail are official Google apps that allow you to send and receive Gmail messages on your iPhone. The main difference between the two apps is that you can set up non-Gmail accounts in the Inbox app. It appears to the right of the app. When the button label change