WhatsEyes is a free Android application developed by FABU under the Lifestyle category. The app allows you to track the online and offline activity of your contacts, and receive instant notifications when they come online or go offline.

With WhatsEyes, you can easily keep track of your contacts' check-in and check-out times, and their online stay times. You can also add more than one number to track, making it easy to monitor multiple contacts at once.

One of the great features of WhatsEyes is its premium membership, which offers advantageous opportunities. Additionally, if you opt for the premium membership, you can enjoy an ad-free experience.

Overall, WhatsEyes is a helpful tool for anyone who wants to keep track of their contacts' online and offline activity.