iTunes cannot sync apps to the iPhone “iPhone” because the apps installed on the iPhone could not be determined.

Same issue. Is this a new bug with iTunes 10.5.1??

Anyone know of a solution?

I reported it to Apple on the feedback page, but, I'm pretty convinced that Apple doesn't listen to or read their feedback. http://www.apple.com/feedback/itunesapp.html

I am having the same problem - haven't found a solution that works yet

its worked for me!

thanks

I imagine there are different causes for this error message and different fixes.

I received the error message today. In addition to this error message, if I clicked on "Check for Update" under Summary >> Version, I received an additional error message (which I didn't copy or write down).

Anyway, I quite iTunes and restarted it. I also rebooted my iPhone (an iPhone 3G running iOS 4.2.1).

This fixed the problem for me.

Tried everything does not work. My phone died last night and now all me apps are crashing. I cant sync any of them. come on dev team fix this problem!

iTunes cannot sync apps to the iPhone “4.3.1” because the apps installed on the iPhone could not be determined.

I had the same error message today. I solved it by going to iTunes on my computer and looking at the Apps. At the bottom of the page is an App update option. I updated the apps using that. Then I tried to sync again and it worked!!!! Hope it helps you too.

I received the same error message after I had recently updated iTunes to 10.5.1 and I had wirelessly updated 13 apps. As the poster above me stated, I had to go into iTunes and select Apps, on the bottom right it said I needed to update 13 apps. I updated the apps via iTunes and then synced again without an issue.

iPhone 4S / OSX 10.6.8 / iTunes 10.5.1

I also got this message when trying to sync my 3G iPhone. I followed several suggestions found here: tried restarting everything, then changing automatic updates in iTunes. I also tried the "scan for hardware changes" suggestion, but nothing worked. Then as per the above posters, I also went into iTunes, selected Apps, and went to the bottom right to get App updates. A list of needed updates appeared with the icons, and as they updated, the icon would disppear, until I was left with "SoundCloud". It appeared to update fine, but the icon remained. I clicked "get update" a couple of times on the icon....it would update but the icon stayed on the list. I tried to sync after this and still got the error. . Then I then deleted SoundCloud from the phone, and the sync worked fine. SoundCloud was reinstalled on my phone during Step 4 of the sync. Hope this helps!!

Unbelievable. I had the same problem. I cleaned my SIM card and the sync WORKED. Thank you!!

All i did was:

1- Unplug my iphone (USB)

2- Reset my Iphone

3- Reset my Mac

Done.

i was facing the same issue few minutes back.....i was thinking of deleting all my apps frm my iphone since i had al the apps in my computer....but i had few files in whatsapp whch i would have lost ...so i dropped that idea....
so i jst restarted itunes and my phone.... and it is worked for me...... hope this might help U... 🙂

Thank you!

That totally worked!

My 4S is brand new, so didn't need to clean the SIM, just popped it out and put it back and Voila!

I updated my apps and restarted both my iphone and itunes and it was fixed.

did you ever solve this? i assume its a fault with latest itunes version?