Tinker lets you call actual phone numbers, so reliability is great and there's no need for the other person to have the app to receive a call. In short, its the easiest, most reliable way to call friends and loved ones around the world.
Key features include:
1. Lowest battery usage with highest reliability / stability on google play.
2. Lowest latency of all android,IOS softphones.
3. Exceptional voice quality.
4. Bandwidth normalization.
5. Voice/Video packet negotiation
6. Bluetooth support.
7. Excellent audio quality, even on older devices.
8. Supports calling over WIFI/EDGE/3G/LTE.
9.Background / multitasking support.
10.
Integration with the native android contact list.
11. Speakerphone mute and hold.
9Apps 4.9
