WhatsApp, the popular cross-platform messaging service, is going to be bringing its subscription model to iOS this year, according to CEO Jan Koum. Koum recently spoke with a Dutch news outlet about the company's near-term plans.
Currently, iOS users can download WhatsApp for a one-time fee of $0.99. In the new model though, which it already uses on other platforms like Android and Windows Phone, the app will be free, with users having to pay an annual fee...