Apps wont work on my iphone

Follow this link and make sure you "authorize your PC" under your iTunes software:

http://support.apple.com/kb/TS1702

I was experiencing the same issues with my 3GS iPhone and the issue went away as soon as I authorized the machine and sync'ed my iphone. All 3rd party apps work fine now.

very odd...

just curious have you restarted the device? (hold power key until slide to power off appears, then slide to power off)

if the power cycle doesn't do it

goto Settings -> Store -> Sign Out then try the free app trick again.

I have the same problem.

I've tried every suggested fix I could find on the forums and google, and also a suggestion I got when visiting the Mac Store. Nothing solves the problem permanently, but I have found a quick fix to get applications to open:

1. Download a new application. It opens for a split-second and then closes.
2. In iPhones, deauthorize your computer, then reauthorize it.
3. Connect and sync your iPhone to iTunes.
4. Now, trying the application, it works!

HOWEVER, new applications I download have the same problem, and I have to repeat the method above to get them to open, EVERY TIME I download new applications. So, every time I want to use a new application, I need my laptop and a working internet connection. Very annoying!

Methods I've tried that have failed:
-Restoring my iPhone (I tried this today, and now have 3.0.1 running)
-Deleting applications and reinstalling them
-Rebooting the phone
-After downloading a new app, running other applications that work
-Making sure my iPhone and Macbook use the same account on iTunes

Anybody out there know a fix for this?

I just got off the phone with an Apple assistant, who fixed my problem. Maybe this will work for you too!

He told me to reset network settings:
Settings>General>Reset>Reset Network Settings

After the reset (which took one minute), new applications I downloaded onto my iPhone worked right away.

When I tried the rest network settings, it did NOT resolve the problem. All the apps I had installed still failed.

I deleted all of my apps, installed and tested each. They are all working again.

My problem began AFTER I turned synch ON with the music files in my PC (XP, ServicePak 2). Perhaps the Itunes put something on the Iphone which interferred with my Apps. Changed hidden settings?

Its all very strange; Ive had my new Iphone 3G phone for 2 weeks and still learning.

My phone started having the same problem after downloading update 3.0.1. None of the suggestions here have fixed it. I haven't tried resetting to factory defaults and redownloading all apps yet, I am definately not looking forward to that 😟

I'm having the same probs with my wife's phone.
Mine is all synced and working fine, but when I did the same thing with her on our shared macbook itunes library, now her app store apps (not her pre-installed ones) just flash on then disappear when tapped.
I reset network settings, then
I tried deleting them all and redownloading them, but there's no difference.
Those fixes seemed to work for a couple people above (thanks for the ideas!), but not so for me.
Others?

FRUSTRATING!!!! I am having the same issue. None of the Apps I have downloaded to my iPhone are working. Came on suddenly - none of the fixes in the discussions are working. This is obviously a widespread issue many are having and it seems Apple has no real response yet. Any ideas???

Same Issue here - since I downloaded update 3.0.1 none of my apps will open, they immediately crash and whenever i try to download new apps its just says "waiting" for ages. I've tried factory reset, network reset, deleting all content from iphone, deleting all apps, still not working. Really annoying!!!! Any help would be much appreciated!!

OK, I FINALLY got my apps to work again. Not sure why it worked this time, but...

This is what I did:
Deleted all apps I had previously loaded of my phone first.
Then went into iTunes and deleted all apps and moved to Trash.
Went back into App Store and downloaded each one by one. I stopped after each download just to make certain it worked.

I hope this helps. The iPhone is less valuable without the apps.

Good luck!

My wife had this issue on her iPhone 3G. I have not had it on my 3GS, but have not upgraded to 3.0.1 yet on it (may skip that for now based upon this...). Following the advice of the other users here is what I did:

1. Manually delete all non-native apps from the phone.
2. Went into Settings>General>Network>Restore Network Settings and chose to restore.
3. Purchased a Free App on the phone from the app store
4. Launched the free app and it worked.
5. Synced the phone back to our iMac via USB as usual, and put some of the old apps back on.
6. Launched the free app I installed on the phone after restore - works
7. Launched the old apps I synced back to the phone - all working.

Hopefully this will work for others until Apple fixes the bug...

I have tryed everything and every ideas in this threat, and nothing worked for me!
Thanks for alle the ideas.

Please Apple, fix this!!!!!!

I've got over 100 applikations on my iphone, i really wouldent like to reinstall all of them one by one.

I was on the phone with apple tech support yesterday for 51 minutes and the guy on the phone denied it was anything to do with the 3.0.1 upgrade although my iphone was totally fine before the upgrade from 3.0 to 3.0.1!!

come on apple this isnt fair on all the people who've spent good money on the iphones and apps!!

I spend almost an hour on the phone with the apple guy, too.
He talked me through doing all the fixes listed in this thread, and then was slightly suprised each time each one did nothing.
Finally he talked me through saving the apps and my pix to image capture on my macbook, then deleting and reinstalling the software on the iphone as if it were brand new. So then I had to go back and put the pix and the contacts and the apps back on the "new" phone.

Took a while, but it's working fine now.

After i prodded him, he speculated that it was "something in the iphone's software," and did not agree that it might have to do with the 3.0.1 update-ness.

blerg.

I experienced this issue already several time both with OS v2 and now v3 tending to prove this has not been introduced 🙂 nor fixed 😟 by latest OS release.

I consider this as the major frustration with the i-phone sofar! This is really a pain in the neck!

-Restarting the device never helped.
-This time, I "only" re-installed (actually updated) one of the app and this was sufficient to "re-enable" all of them. Sounds like the best workaround for me for the time being. (else you need to go further in the re-install process and I reckon this is REALLY painful when you have plenty of application).

Something gets probably corrupted at some point in the application database and issuing a modification to it (like an app update) seems to bring it thanksfully right again...but until when?