Colin app offers simple User Interface and superb audio quality VoIP calls in affordable rates. Colin works on all iOS devices and supports calling over WIFI/EDGE/3G/LTE. In order to use this app end users can register with their mobile number.
Key features include:
1. Lowest battery usage with highest reliability / stability on App Store.
2. Lowest latency of all IOS softphones.
3. Bandwidth normalization.
4. Voice/Video packet negotiation
5. Bluetooth support.
6. Excellent audio quality, even on older devices.
7. Supports calling over WIFI/EDGE/3G/LTE.
8.Background / multitasking support.
9. Integration with the native ios contact list.
10. Speakerphone mute and hold.