Motto Calls at Mac App Store analyse

Motto Calls offers a simple user interface and superb audio quality for smooth Voice over IP experience. Key features include: - Bluetooth support. - Lowest battery usage with highest reliability / stability on all iPhone models. - Lowest audio latency of all iPhone models. - Excellent audio quality, even on older devices. - Supports calling over WIFI/EDGE/3G/LTE. - SIP stack fully compliant to RFC. - Background / multitasking support. - Speakerphone mute and hold. - Supports sending of DTMF. - DNS SRV. - Built-in echo cancellation. - STUN support.