Last Seen Tracker Application is a free Android app developed by Tra Apps, which helps users to check the last seen status of their contacts on WhatsApp and Telegram. It is a simple and easy-to-use app that allows users to track the activity of their contacts and know when they were last online.

The app works by constantly monitoring the activity of the user's WhatsApp and Telegram contacts and updating the last seen status in real-time. The app also provides a notification feature that alerts the user whenever a contact comes online or goes offline. It's important to note that this app is just a helper app and is not affiliated with WhatsApp or Telegram.

Overall, Last Seen Tracker Application is a useful tool for those who want to keep track of the online activity of their contacts on WhatsApp and Telegram. The app is easy to use and provides accurate information about the last seen status of the user's contacts.