You can track contacts with WhatsPlus and receive instant notifications when the person you follow is online in WhatsApp.

You will be able to find out how many times you have been online during the follow-up.
Even if the last sighting is closed you can instantly follow and receive your input as a notification.
You can find out the total number of minutes online in the day and you can also see how much of a weekly two-week three-week and monthly.

Disclaimer: This application is a personal application and is for entertainment purposes. It is not affiliated with any institution or organization.