By Justin Boby Joseph

  • Category: Social Networking
  • Release Date: 2019-06-12
  • Current Version: 1.1
  • Adult Rating: 4+
  • File Size: 28.65 MB
  • Developer: Justin Boby Joseph
  • Compatibility: Requires iOS 9.1 or later.


Kollbox app offers simple User Interface and superb audio quality VoIP calls in affordable rates. Kollbox 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. Exceptional voice quality. 4. Bandwidth normalization. 5. Voice/Video packet negotiation 6. Bluetooth support. 7. Excellent audio quality 8. Supports calling over WIFI/EDGE/3G/LTE. 9. Background / multitasking support. 10. Integration with the native iphone contact list. 11. Speakerphone mute and hold.