The application is solely and exclusively WhatsApp. It’s called Tracker for Whatsapp and all you have to do is go to the Play Store, look for it and download it, but it’s only available for Android phones.
Tracker for Whatsapp is a totally free app and once you open it on your smartphone you will know the information you need about how many times and who see your profile picture. The data that the application provides go from who entered your profile picture, how long you were watching, if you zoomed or if you saved the image on your device.
Warning: The app only stores information about who saw your photo in the last weeks.
Although the service of Google Play qualifies as good to the application, it is necessary to tell you that several users who have already downloaded it have complained because the information it provides is sometimes not accurate, doubting if it really works.
WhatsApp has become the most used instant messaging application of the moment, only last year registered more than one million active users around the world, and every day seek more updates, like the latter.