・ I want to invite my friends, but I'm worried that they will be refused ...

・ I want to talk to this person, but suddenly sending a message is a high hurdle ...

In that situation, you can easily realize them.
This app is an app that just informs a specific member that "I am free now" and waits for some reaction from the other party.

There is a limit to the number of people who can be informed of their free time, so if you want to inform someone of your free time, you need to carefully select your friends.
So if someone also informs you that you are free, you can feel free to send a message to that person with confidence.