skype vs whatsapp SOURCE
Skype can be logged on and off, Whatsapp is always on and can drain your battery quickly and eat up your data plan allowance.
Whatsapp tracks your location by GPS.
Skype can be used on any mobile device plus PCs and Macs, etc., Whatsapp cannot be used on PCs, Macs, laptops / notebooks / netbooks.
I value my business and personal privacy, and flexibility. I would not touch Whatsapp. I heard that they also upload all your phone contacts up to their server without your permision!
Wow, what abuse.