PocketMine-MP for Android is a free and open source app that lets you manage servers in Minecraft: Pocket Edition from your Android. You can create servers, manage their features, and use plugins. Naturally, managing servers in Minecraft (even if it's the Pocket Edition) is not as easy as playing the game. So, if you've never done something like it, it might be hard to get started with this app. If this is your case, you should probably watch a few tutorial videos before you actually try using this app. PocketMine-MP for Android is a really useful app that makes it easier for you and your friends to play Minecraft: Pocket Edition online.
Requires Android 2.3 or higher