Surprisingly: Viber. Viber Out works great for calling out to 50 countries, and most text communication is on eMail/Slack/iMessage/etc
It's been a few days of Viber and already I see several pluses:
* Putting a call on speaker takes one tap and doesn't hang my phone, unlike Skype which pops up the native iOS sound output device chooser for some reason.
* Easy to see call history & times under a given contact (Skype did a weird center-aligned thing that made the information super-difficult for human eyes to parse)
* Easy to edit contact name info (Skype made this like 5 menus deep)
* Easy to set/remove contacts as favorites (Skype hid this somewhere new every few weeks)
It's been a few days of Viber and already I see several pluses:
* Putting a call on speaker takes one tap and doesn't hang my phone, unlike Skype which pops up the native iOS sound output device chooser for some reason.
* Easy to see call history & times under a given contact (Skype did a weird center-aligned thing that made the information super-difficult for human eyes to parse)
* Easy to edit contact name info (Skype made this like 5 menus deep)
* Easy to set/remove contacts as favorites (Skype hid this somewhere new every few weeks)