Join.me on the iPad
There's a version of join.me for the iPad but it isn’t quite the same thing as the version you can use to fix Uncle Fred’s computer.
You can use the free iPad version of join.me to participate in multi-screen meetings from the iPad. You will need to be invited to join a meeting by the ‘host’ just as Fred invited you to join his PC. You can then see what is being shown on the ‘host’ computer. But, as you might imagine, you don’t have remote control of this computer.
Join.me has a paid-for 'pro' version, and if you are a subscriber you can also deliver information from your iPad to others who participate in a join.me session. This is most likely to be useful in a work scenario where you want to share information such as presentations with people who aren’t near you. If you work from home, or happen to be away from your main office, or need to share information with colleagues who are away from base for some reason, this could be invaluable.
You can also use join.me on an iPhone or an iPod touch in the same way. You can’t use the facilities through a general web browser, though – you’ll need to go into the app store and download the free join.me app.
If you want an iPad app which gives you remote control over a Windows PC, try Splashtop 2 - Remote Desktop. The connection is surprisingly fast - good enough even to play games, complete with sound. However, you'll benefit from using a Bluetooth keyboard if you don't want to obscure most of the iPad's screen with the on-screen keyboard.