Guidelines - Delete Skype History Network Edition
Delete Skype History Network Edition uses Microsoft .Net Framework which is shipped with any version of Microsoft Windows starting from XP Service Pack 3. While installation process Delete Skype History checks out Microsoft .Net Framework version and if missed proposes to download the framework from Microsoft web-site.
Although Delete Skype History Network Edition requires Microsoft Windows, all your changes in chat messages will be automatically spread on all devices where you’re signed-in to Skype as well as devices of your chat partners.
Read more about how to delete Skype chat messages on iPhone and iPad