UiM is an instant messaging application that allows for single-person, group chat, instant voice and video calls, group video conferencing, and all messages are encrypted so that users don't have to worry about the message being stolen by others.
Features are as follows:
1. Free to use: UiM all features are free to use, no charge for registration, and no advertising.
2. Video and voice conferencing: Single or group video or voice calls, let you contact without borders.
3. Group, single-person chat: text chat and send voice, picture, photo files, all messages are encrypted, so that you can chat with confidence.