After a long time of waiting, we finally have the Nokia Counters application released exclusively for Lumia family. The app displays the Calls, Messaging and Data Usage and also allows you to set a limit on them, but the app still have some flaws as stated on the Nokia Labs page.
- there are no notifications when set limit is achieved (will come later)
- conference calls are not counted properly
- not possible to set data limit counter with a fractional part (i.e. not possible to set 1.5GB limit)
The app can be downloaded from here.