Thanks to a new application ‘ChatWatch’, spying on WhatsApp contacts online and even offline activities has been made possible for both iOS and Android users.

According to lifehacker, social media giant Facebook is constantly spying on its users and since WhatsApp is owned by the company, the data being collected quietly is becoming handful for ChatWatch to track one’s contacts and friends on WhatsApp.

From how frequently a contact checks WhatsApp to estimating when a WhatsApp friend goes to bed every day, the WhatsApp spying application lets its users know all. “Find out when they went to bed, how long they slept…Even compare chat patterns between people you know, and we will tell you the probability of them talking to each other during the day using Artificial Intelligence,” the application writes on its official website.

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ChatWatch even lets the user monitor their friend’s activity even if their ‘last seen’ feature is disabled. ChatWatch is free to download but charges some amount to spy. Rs. 250 is charged weekly to spy on two WhatsApp friends and maximum ten contacts could be tracked by paying Rs. 2,350 monthly.

The application was initially available for both iOS and Android device but, was removed from Apple’s App Store for reasons unknown. However, it can still be downloaded from Android’s Google Play Store. ChatWatch plans to launch a web version tomorrow.