HiDa! is a free video and audio chat app that provides complete end-to-end security and encryption in your calls. It offers great speed and quality in video and audio calls, and works in any level of internet connection while using very little data. The app allows you to video/audio chat with up to 8 people at once.

One of the best things about HiDa! is that there are no subscription fees or international charges to use the app. You can video/audio call your friends and family for free, even if they are in another country. HiDa! uses your phone's internet connection, rather than your cellular plan, to let you make calls. The app also offers a screen share feature that allows you to share activities on your screen, making it a multi-purpose chat app.

With HiDa!, you can log in to a chat room where your friends are present, attend the call, and then log out and log in to another chat room without any confusion. You just need to enter your username and a chat room name to which your friends can also join. If you are confused about the buttons, the app provides a clear explanation of each button's function.

Overall, HiDa! is a great app for video and audio conferencing with friends and family, providing complete security, and great speed and quality.