Data Counter and Speed Meter helps monitor data usage according your plan to avoid extra costs and save your money on phone bill.
FEATURES
Monitor mobile data for home network
Monitor mobile data for roaming network
Monitor data usage by installed application (roaming, mobile, Wi-Fi)
Several time plans (daily, weekly, monthly, custom period)
Warning for reaching limit at 75%, 85%, 90%, 95%, 100%
Notification shows used limit, current internet speed, used mobile/roaming data, used Wi-Fi data
Highly customizable widget shows used limit, current internet speed, used mobile/roaming data, used Wi-Fi data
Option to add extra data package
https://play.google.com/store/apps/details?id=com.msd.counterdata