Keep In Plan

[dneill2006]

Found this great app to monitor tariff use ie, calls, text and data

Keep In Plan - Android app on AppBrain

Only two comments about it both being negative, but I've just installed it and works fine

 

[Phenomenological]

Nothing there 'Stats' can't do for free that I can see?

Stats v1.5.5 Application for Android | Tools

Edit: Unless you need to monitor landline calls separately.

 

[lekky]

If you are on orange, then they have an official app to do this too called Your Orange: