050 Free is a smartphone app that allows VoIP calls to regular phone numbers.
Users simply need to setup their account with a Brastel Card, a prepaid calling card distributed in Japan, to start making calls at extremely reasonable rates within Japan or to overseas.
Apart from cheap international and domestic outgoing calls, 050 Free also offers a local phone number totally free of charge for incoming calls. Calls between 050 Free users are free of charge and from other phones, the charge would be as calling to an IP phone number.
CallKit support on iOS10:
・ Calls can now be easily answered from the lock screen. You will not need to unlock the screen before answering your calls anymore.
・ You can place 050 Free calls from your phone's native contacts app. Open a contact and long-press the phone icon to select the app to place your call with.
启用“家人共享”后，此 App 最多可供 6 名家庭成员使用。