My apps will not update after selecting to update all what can I do?

First, do a Reset [Hold the Home and Sleep/Wake buttons down together for 10 seconds or so (until the Apple logo appears) and then release. When the screen goes blank then power ON again in the normal way.] It is 'appsolutely' safe!

Now go back to the apps and try updating them one by one. This method can be less problematic. Let me know how you get on.

Usually it's because you are not making internet connection via wifi.

Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398

iPad: Issues connecting to Wi-Fi networks
http://support.apple.com/kb/ts3304

Additional things to try.

Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.

Change the channel on your wireless router. Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html

How to Quickly Fix iPad 3 Wi-Fi Reception Problems

http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/

If none of the above suggestions work, look at this link.

iPad Wi-Fi Problems: Comprehensive List of Fixes

http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/

Fix iPad Wifi Connection and Signal Issues
http://www.youtube.com/watch?v=uwWtIG5jUxE

 Cheers, Tom 😉

16GB iPhone4: Go to Settings, scroll down to iTunes & App Stores and touch. At the top of the next page it shows: Apple ID. Touch this. Select Sign Out. Your Apple ID will go away. Re-enter Apple ID and password. Try App Store again.

Other solutions were to go to Settings:General:Date&Time and turn off auto-update, then change date to next year. This didn't work for me, nor a lot of other users on the forums. It took reading a lot of threads to find the log-out, log-in solution. Even on the official Apple Website all I saw was: Make sure your connection is working, battery is charged, desktop is plugged in when you try to sync. OK I exaggerate, but with all the users posting this problem, you'd think they'd post their solutions when they work with a Tech Help call.

you can also update your apps through the itunes store, by clicking on "Apps" on the left, then "Updates" in the top bar, then "update all". then re-sync your ipad, ipod, or iphone.