The free DSLRdashboard app. for Android enables an Android tablet to be used as a remote control for Nikon and Canon DSLRs.
It also runs on Windows,Mac and Linux PCs; and there is now also a version of iOS, but I have no experience of that.
I have tried it with a Nikon D5100 and a Nexus 7 32GB first generation Android 4.4.4 tablet.
It provides liveview (and post shot review and optional download) on the tablet display plus access to most (all?) camera controls via the tablet touchscreen.
It can also do timelapse, extended bracketing and image stacking.
If your tablet supports USB OTG then you just need an appropriate USB OTG cable to connect to the camera via your camera USB data cable for wired remote control.
Alternatively you can use a TP-Link TL-MR3040 portable battery powered wireless N router with modified firmware and connect to the camera from your tablet via Wifi for wireless remote control.
More information:http://www.dslrdashboard.infohttp://lrtimelapse.com/gear/dslrdashboard/http://www.tp-link.com/en/products/deta ... =TL-MR3040http://forum.lrtimelapse.com/Thread-vid ... 3040--3752
About the version for iOS ($9.99 from iTunes):http://dslrdashboard.info/qdslrdashboar ... r-ios-now/