R visuals supported by which of them? and difference between R Visuals and Custom R Visuals

Hi Guys,

R visuals supported by which of them?

1. Power Bi Poertal
2. Publish to Web
3. Reports hosted on Power BI Embeded (v2)
4. Power BI Mobile App ( for reports hosted on app.powerbi.com)
5. Power BI Desktop
6. Power BI Report Server

Also can pls explain difference between R Visuals and Custom R Visuals?