Experty is an app that lets you talk to people without sharing your contact details. You have to create your profile mentioning your expertise in a specific area like blogging, or crypto trading or any specialized skill that you may have that can be useful.
You have to also set a per minute rate for sharing your knowledge. Think of it as a Skype like app that pays you to share knowledge about things that you know about. You can find more information about Experty on their website
https://www.experty.io/