Each time you level up, the addon records:
- Your current total playing time
- The current date and time
- The zone (and subzone) you are in
Using the /leveltimings command or the minimap button you can open a user interface to view the level timings of your characters. Also you can compare these timings of one character to those of another, and also select a starting level to compare (eg. if you only want to see level 110-120, you can select 110 as the starting level).
Unfortunately the addon does not yet have localization so most text is in English.