Recommended #AppOfTheDay is:
A platform to talk with others via text and/or video. Create rooms and even host your own server. Riot can connect to other apps, such as slack, to create a big connected community! Uses the matrix protocol. Best alternative to Discord & Slack.
Available on the App Store, Web, F-droid, Google Playstore, Linux, Windows, & Mac.
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!