I can't download apps on iPad Air on IOS 9.3

You will have to provide more information than that. Maybe start with ....What happens when you try? Describe what is happening in detail.

GO to App Store selected app to download the little circle comes up but doesn't do anything on app screen just says waiting I've reset my iPad 3 times now and I've tried to update softwear but just comes back an error has occurred can not update internet connection is fine n I have plenty of space on iPad not sure if this will help with anything has I'm not that great with all the tech stuff sorry

OK. Start with this and we will go from there.

Try updating one app at a a time. Don't use the Update All button.

Tap the circle to stop the download, then tap Update again. Try it a few times. Usually that works for me. If that doesn't work. Go to Settings>Airplane Mode>On. That will disconnect you from your WiFi connection. Give it about 30 seconds and then Turn Airplane mode off. Try updating again.

If that doesn't kick start the updates force restart your device, then try again. This will not affect any data.

To force restart your device, press and hold both the Sleep/Wake and Home buttons for at least ten seconds, until you see the Apple logo.

II've tryed all of that n still doing the same i have looked up a few things on here bout it like changing the language restetting the iPad never had any problems till now

You have tried different Wifi networks? Is everything else connecting to the Internet OK?

YYes even connected to my phones internet vodaphone that's what I'm using now to make sure it's not that is there a way to proper reset iPad not bothered bout pics wipe it all out would that do anything

I Would hate to see you wipe the iPad just yet. I would like to think that there are other things to try first. Have you tried resetting all settings? This will put the default settings back onto the device and you will have to enter all of them again. Settings like your WiFi network passwords, privacy settings, selecting your wallpaper again...those types of things. When you reset all settings the device will reboot on its own.

Settings>General>Reset>Reset all settings.