soft 4 free: Mobile Counter Pro

Mobile Counter Pro - 3G, WIFI
play.google.com.mobileCounterPro
Mobile Counter(3G, WiFi, network traffic) - application to count network data GSM/CDMA/WIFI
Languages support: English, German, Slovak, Polish, Chinese, Romanian, French, Italian, Portuguese, Russian, Czech

Calculation types:

Standard counting(default)
Enable/Disable rounding in blocks (e.g to 100KB for session)
Enable/Disable separately round outgoing and incoming transfer to block of data
Disable couting outgoing(sent) transfer

Similar application to 3G watchdog, netCounter, netTraffic, network traffic,

Application without ADS and for free. Extended functionality has been added for users who donate application.

You decide how worth/useful this application is for you, so you can donate with value you want New functionality for users who donate application:

Features:

More widgets 2X1(WIFI, transfer limits, billing period)
More widgets 1X1(GSM, WIFI, transfer limits, billing period)
New styles for notification bar (limit transfer, mobile GSM/CDMA, billing period)
Transfer used by application (req. android>2.1)
Export/Import data to SD card
Billing period calculation
Option to not counting sent transfer
Option to set alerts when transfer limit less than ... (in MB) will expire in ... (days)
Option to enable vibration when transfer limit will be exceeded
Option to set first day in week (Saturday, Sunday, Monday)
Show application icon in notification only when enable GSM/CDMA/WIFI
Set expiration period in days, weeks, months
Option to count separately transfer for one WIFI SSID e.g to count hotspot traffic
New statistics (for billing period, WIFI SSID)
Option to add not used transfer from last period to next