If you rely on WhatsApp to message friends and family, it’s important to know that the service lets your contacts know about when you’re available to chat, and whether you’ve read their texts.
That’s not all: Lifehacker has spotted Chatwatch, a new iOS app that uses WhatsApp’s public online/offline status feature to tell users how often their friends check the app, and estimate when they go to bed each day; it can even correlate data on two contacts you choose to guess if they’ve been talking to each other.
Yeah, there’s no need to give anyone that sort of ammo. I prefer to maintain a low profile on messaging services so I can chat and respond on my own terms, so it’s rather alarming to know that my contacts can keep tabs on me this way.
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