It was very good and deserve 5 stars but ...
It was very good and deserves 5 stars, but recently when I want to contact my family through this app they could not hear me and I could not hear them either. Moreover, Swisscom io doesnt have customers support service (They dont have email, chat or telephone number to contact them). I hope they fix it ASAP.
Abdullah AL-Qahtany about
iO App – Made in Switzerland - for the world!, v3.5