SIPhone

SIPhone is the SIP calling client for your Sipona line. Make encrypted HD-quality calls right from your iPhone — incoming calls ring natively through the iOS call UI, even when the screen is locked. • Encrypted calling (TLS/SRTP) and HD voice • Incoming calls via CallKit — ring in the background too (PushKit) • Sign in with e-mail and password — that's it • Call transfer, blind or attended • Call waiting and switching between calls • Phonebook & caller ID, per-call number withholding • Interface in 24 EU languages SIPhone is built on open-source software (baresip) — licenses are viewable in the app.