How to share my app

I am developing a simple app only for co-workers.
how to make so that everyone can install it on their smartphone?
Thank you in advance.

You can use Microsoft’s AppCenter for Example:

If your app is in android then you can simply create a list of user’s email id and create internal test
here you can found more information about it.

use for share your app

Thank you for your answers.
I’m going to watch this.
do I have to convert the app folder to be able to send it?

Normally you just upload the Final .apk (Android) or .ipa (IOS)