EDIT: Dear OP, I missed the part about not having access to computer, feel free to ignore the rest.
One of the scripts that is very helpful and enhance your knowledge of Japanese is this one:
It identifies kanjis that were created with common phonetic compound and therefore the reading is the same. Native speakers are aware of this feature of their language and they sometimes can guess the reading of unknown kanji.
Because of that script I always try to do my lessons on computer.
Many other scripts just make your overall experience more pleasant. Some give insight into your journey (historical data), like Heatmap:
So try one or two from here:
see if you like it. You can always disable/delete all of them.