So on your iphone it may have several notifications on App Store to say you have new updates for your apps . When you go to update them you can't see the apps that need updating . Infuriating !
So you could try signing in and out of App Store and turn your phone off and on again . This could work . If this does not work try this next step .
Settings General Date &time Uncheck the set automatically tab to off Manually input the date to a few years in the future . Go onto AppStore onto updates and another message pops up , ignore it .
Now go into settings general date & time and set the "set automatically " tab to on . This will change back to your normal date & time . Go back into AppStore and you should find your updates ready .
The creator of this guide has not included tools
Yorkshire , uk