The built in data usage monitor in the OS is great, except for one thing, I'm on a pre-paid plan (30 or 90 days) and the built in monitor only does month to month (eg Jan 4 to Feb 3)

That's where Data Witness comes in. Just set your term starting day, any data you used before Data Witness was installed, the length of your plan in days and you're set!

You will get notified:
Up to two times at custom set usage levels.
When you start a new term.

No ads, no bloat to eat up battery.

You even get a choice of handy home screen widgets and/or a persistent notification to keep you updated and informed.

Optimized to be lightweight and easy to use.

Please contact IWIK if you have any issues, questions, or comments.