My website: www.centrodereiki.org, hosted by Magix, cant be seen in most smartphones, iphones, tablets and ipads. Just a pile of words on a blue screen. Any explanation for this?
The site linked to by the above address is definitely not iPhone/iPad friendly - Apple no longer support Flash.
Smartphones and tablets depends on their OS and whether they have Flash Player, or a suitable browser that can play Flash files, installed.
The general rule is, for maximum cross device browsing, you do not use Flash, or you have a seperate text and image version designed for mobile devices again which does not use Flash - this would also involve detecting the device type and routing the browser requests to the appropriate site.