When will egOS/EGOSChat be available for download?

We're still figuring that out ourselves! We're hoping to release both around either late 2022 or early 2023.

Will I have to pay?

Hopefully not! egOS and anything affiliated with it shouldn't be paid products for now.

Can I use egOS for everyday things, such as E-mail, or more advanced things, such as web or game development?

Yes, and yes! egOS runs on Linux, Kubuntu specifically. If you can do it in Linux, you can do it in egOS!