Free secure VoIP calls

Do you respect your privacy during phone calls? In this case this application for making free secure voice calls in a private group over Internet will be definitely interesting for you. At first briefly about usage of the program and next in detail about privacy, confidentiality and independence.

Usage of this program is very simple:
1. Choose your own user name.
2. Add user names of people with whom you wish to communicate into the application's contacts list by using "+" button. On-line contacts available for calling are being marked by the green mark to the left of the user name.
3. For creating of the private group you need to set the group password which should be the same for all members of the group. In this case only people with the same password will be able to communicate.

In order to save the traffic and battery charge, do not keep the program running all the time, but start it only if you need to make a call.

And now about how the independence, confidentiality and security of your conversations are ensured:

1. Protection from call tracking. This is a completely decentralized communication system without any master server that knows all of its subscribers, stores their contact lists and has full control over all communications. Therefore, in such a system it's impossible to trace calls, capture, substitute and block conversations.

2. Protection against wiretapping. All calls are encrypted using the AES algorithm with a 256-bit key, and a new random encryption key is generated for each communication session. The group password is used to access the private group and to securely exchange encryption keys between members of this private group, therefore choose the complex password and periodically change it if necessary.

3. Protection against detection and identification of a communication session. Each network packet is completely encrypted and absolutely unique, which makes useless the deep packet inspection (DPI) systems used to detect, wiretap and block IP telephony protocols such as SIP, RTP, ZRTP and SRTP. Therefore application works everywhere, even in Iran and UAE.

4. Protection of privacy and anonymity. Absolutely no information about you is required! Neither the phone number, nor IMEI, nor MAC address, nor e-mail, nor something else is necessary. You just choose your user name (nickname, alias) which can be changed at any time. Application does not store the call history and any activity logs. After exiting the application, all the information about your calls will remain your secret.

5. Communication without intermediaries. The direct connection (peer-to-peer, P2P) is established between two devices during a call even over NAT. If both parties have private IP addresses and access Internet over NAT, a direct connection is still possible if you will add each other into the contacts list in the program on both devices.

6. Protection against hackers. It is not necessary to create any accounts neither explicitly, like in Skype and various SIP, IAX and other VoIP services, nor implicitly, as in Viber and similar programs using your phone number for your identification. And since there is no account, it can not be cracked!

7. Only the minimum permissions are necessary, and it is absolutely enough for voice calls! Just compare to other mobile dialers installed on your device, maybe they require too much superfluous permissions in order to take your device under their control?

8. Independence from the method of network connection. You can switch from mobile data to WiFi and vice versa right during a call, and in most cases your call will continue after a small pause.

9. Calls with HD voice quality as in high-speed mobile 3G/4G/LTE or Wi-Fi networks and also via a slow 2G GPRS/EDGE connection.

10. Works even in a pure AOSP without GAPPS.