IGap


iGap is a free open-source instant messaging application for smart phones and personal computers. iGap provides all users to interact with each other and exchange information through text, image, video, audio and other types of messages. This Iranian messenger has also featured P2P-based voice calls for the first time in the country and contribute users over the internet.
iGap exists for Android, iOS, and desktop systems.

Security

According to the producers, two AES keys are used in iGap to encrypt symmetrically. The first is for the client-based and the second one is for the server-based ; the user can create a random code by combining these two keys and send it to the server, server transmits all this user's messages with the forwarded key afterwards. In addition to the encrypted system, all connections between server and users will be covered with the activated SSL 2048. Thus, it would be impossible to eavesdrop the information on the route. The voice call possibility in iGap follows the most modern technology in the world which is used in Signal as well. In this tech for voice call, server can never interfere in and is called P2P literally.
Mohammad Rasoul Kazemi founder of IGap has declared in an interview:

Open-source

iGap has published client-based codes and make them available for everyone and stepped forward in the open-source community in the world by holding a competitive event for programmers and developers.
The whole codes of Android and iOS version and even the iGap programming applicable interface were made available on GitHub for interested developers.

Internal Support

The Iranian leader Ali Khamenei referred to this messenger on his personal website. and
Mohammad-Javad Azari Jahromi as the ICT Minister of Iran has joined this messaging application in September 2017 in order to support local social networking.
Earlier, the Minister has claimed to support local Messengers when he was deputy of the ICT Minister.