but productivity never was it&#x27;s intended target - skype was killed on mobile because of shitty notification requiring the app to be on for the longest time, call dropping, software block to 3g calls.<p>basically they shot themselves in the foot on the mobile market with an half assed implementation, and even today the notification system on skype mobile apps is dumb, especially how they handles balloons (the only app that could do worse on notification balloons is facebook)<p>whatsapp may not be a cornerstone of reliability, but it has an incredibly frictionless mobile user experience.