[johnniearchangel]

Most Apps not updating on my iPhone 6.

Have tried the following options:
Restart my phone
Switch it off
Log out my Apple ID, restart
Log out my Apple ID, switch off

Any other option(s) I haven't tried?

Also, most times I use iTunes to download apps and updates to my pc, then sync iTunes and iPhone to update or install apps. Could that be the cause?

[Just_Me_D]

Delete the app, reboot, and then reinstall it.

[anon(9602380)]

I do exactly the same as you. I will update my apps through iTunes then sync them to my phone. Only difference is I use my iMac instead of a PC, but that should make absolutely no difference. I can still update my apps through my iPhone though. Have you tried a hard reset on your phone. Hold the Power & Home button till you see the Apple logo. If that does not work, is it possible that you have a bad Wi-Fi or data connection that is preventing it. Check Your settings in the iTunes & App Stores. I have nothing turned on. I do not have any other suggestions. Hopefully soemthing I did suggest will help.

[jsing2010]

What always works for me is deleting the app, restart phone and redownload. It doesn't happen very often but that's the only fix I've found so far