Online Tracker for Whatsapp is a parental monitoring application developed by Diamond Mobile Soft. It is compatible with Android 9.0 and is available for free. The app falls under the Utilities & Tools category and provides online and offline status notifications for Whatsapp.

The app allows parents to monitor their children's Whatsapp usage by providing detailed reports and instant notifications of their online and offline status. This feature is useful for parents to keep track of their children's activities on Whatsapp and ensure their safety.

Overall, Online Tracker for Whatsapp is a helpful tool for parents who want to monitor their children's Whatsapp usage. However, it is important to note that the app is solely for parental monitoring and should not be used for any other purposes.