How to play Minecraft Pocker Edition(app) online?

There's one way I know of, But you need to be connected on the same Wi-Fi. But I don't believe that you want to play with friends at your house… There's also realms but it's still in production and costs money

I don't know if it is on the google store but there's an app callled ultamate muiltiplayer for minecraft ($2.99) it allows you to connect to other people's mincraftpe and play with them. I have it and it works ok on iphone