Q: Touch ID not working after 8.3 update for App Store purchases

It has started working again.  I haven't done anything else to troubleshoot so I'm guessing it was a server side issue as well.

I've only signed in to thank you, mate. I don't know why, but introducing my password after a simple reboot did the trick for me.

Excellent!

Works well !!!

Thank you very much !!!

I didn't need to reboot iphone, I follow this: http://www.iphoneincanada.ca/how-to/fix-ios-8-3-missing-password-settings-2/

and touch id is back for app store, last step is not mentioned there  go to Settings >> Touch ID & Passcode, and turn the iTunes & App Store option toggle on.

Those settings are for if you use a password to make purchases. They don't affect TouchID. TouchID will pop up for free or paid apps regardless of what settings you have chosen for when passwords are used.

I know that, but I was able to get touch id after I follow above mentioned steps

1. Launch Settings on your iPhone or iPad
2. Tap on Touch ID & Passcode
3. Enter your Passcode or Password
4. Toggle iTunes & App Store to OFF
5. Press the Home button to return to the Home screen.
6. Reboot your iPhone or iPad. (Here's how)
7. Enter your Passcode or Password at the Lock screen
8. Launch Settings on your iPhone or iPad
9. Tap on Touch ID & Passcode
10. Enter your Passcode or Password
11. Toggle iTunes & App Store to ON

Just started working on it's own.  Apple must have fixed this on their end somehow.

Folks......Apple is aware.  There have been widely reported news stories on this, so there's nothing you can do until Apple puts out a patch.  If it makes you feel better to use the contact us button on the bottom right, go for it, but it's not going to get this resolved any faster.  In the meantime, it's not an emergency.  We all used to download apps by entering our Apple ID.  Until this is resolved, just enter your ID.

HeY try this,,  go to the App Store scroll down to the bottom of the screen where you see your login name,,, log out and log back in.  

GO to the App Store scroll down to the bottom of the page where your login  name is.      Log out and log back in.   It workEd for me.   

My 6+ was doing that too, but I "fixed" it (so far)... This is what I did...

1) Settings > Touch iD & Password > iTunes & App Store > OFF

2) press & hold the lock button & home button until my phone reset

3) turned my phone back on

4) Settings > Touch iD & Password > iTunes & App Store > ON

5) when I did that, it said that I needed to enter my Apple ID password for it to work.

6) After I entered my password, my Touch ID works for the APP Store.

idk if it will keep working or not, but so far it is working.

Rebooting the phone fixed the issue for me.

I tried toggling "iTunes & Appstore" off and on first thing yesterday, but I didn't reboot and still didn't work.   I tried the steps and rebooted and it seems to have fixed the iTouch problem with the appstore.  So I had to reboot here it seems.