Well, as a top-performing app with an overall rating of 4.46 I can only add what people who have tried it are saying. What makes it successful? It is very easy to use for such a solid social networking app with built-in collaborate features. Skype Communications S.a.r.l has put efforts and engineered a sophisticated chat app. Say “hello” with an instant message, voice or video call – all for free*, no matter what We recommend using an unlimited data plan or WiFi connection. Express yourself – Liven up conversations with emoticons, click on the “+” in chat to send a Giphy or images from the web, and annotate images with words, lines and more.You can also call mobile and landlines at low rates. Voice calls – Camera shy? Make voice calls to anyone in the world on Skype.Share your screen to make travel plans with friends or present designs to your team. Save shared photos and videos to your camera roll. Share – Send photos and videos with your family and friends.Send messages to your friends, grab someone’s attention with mentions, or create a group chat to plan a family reunion. Watch everyone’s smiles and cries when you tell them “We’re engaged!!!" Video calls – Don’t just hear the cheers, see them! Get together with 1 or 49 of your friends and family on a HD video call.Skype for iPhone is a social networking app specially designed to be fully-featured productivity app.