3G Watchdog (Android)

Limitations of the data flow for many reasons create problems when using smart phones because, when you crossed the limit allowed, payment for extra circulation regular fees is usually not affordable - expensive.
To avoid unnecessary costs and unexpected, you can use this tool which will warn you when you're approaching the limit allowed. But not only this.

4G/3G/Edge/GPRS supports networks, enables the determination of quotas with alarm, offers a variety of statistical data, can be seen stacked that is active when any of the networks, the story made ​​circulation can export it to a file CSV. In addition, there is also widgeti, the professional version which has more features than the basic free version costs almost three dollars