Are there any commands in Minecraft Pocket Edition? I'm looking for both singleplayer and multiplayer commands including admin commands.
Version 0.16 and later
Support for some commands was added with version 0.16 (October 2016).
Version 0.15 and earlier
No. There is no command functionality, and it's possible that the commands code isn't even present in the program yet.
At the present 0.15.10 update, commands in single player worlds are not yet supported. In 0.16.0 (the boss update) Mojang will add a few commands like
/time set and
/kill, etc. for more info go to Mojang's posts about it here and here. I don't know all the commands they are adding in 0.16.0, but later in 0.17.0 or later they will probably add more commands. 0.16.0 will be released October 18, 2016, and I have heard that 0.17.0 might be released in November.