If you are looking for contest logbook which you can run on your tablet with Android, than Tucnak is excellent choice.
Tablets are very useful for portable operations because they use less energy than notebooks (mostly). Most of the tablets running under Android system and problem is with using usual contest logbook software. So Tucnak is an excellent choice for Android user.
The software is user-friendly but better is make some training before the contest. On Tucnak web page you can find great documentation and downloads link.
Enjoy in your next contest wit great contest logbook!