Dasta - last seen online can easily track a phone number and you can easily monitor any phone number you want Also you can immediately see long he/she remained active.
Dasta - last seen online for Whatsapp app is free and simple to use. Just download the application on your mobile phone enter the phone number of the phone you want to monitor and press the button "Start". That's it! The application will immediately begin to record the activities of she/he. The application uses notifications to inform the user when the child was last online and when he/she is online again.
The app will informs you of the activities of your gf/bf on Whatsapp. The application is very easy to use.

-Provides parents with the ability to monitor children's activity online
-Monitors Whatsapp activity
-Add unlimted contacts
-Detailed Reports
-Daily reports
-Get Notifications
-Instant notification on activities
-last seen and online status for your friends

See if he/she has read the message reply to the message delete the message when the child last online when the child last used Whatsapp when the child last active on Whatsapp.
Get a detailed online report including the time and duration of the last seen and online time line.
Disclaimer: Dasta is created by us. It is not an official WhatsApp application nor associated or affiliated with WhatsApp Inc