"Sign in to Complete Purchase" message after updating to Apple Watch OS 6.0

OK. Here is the fix that worked for me!

1. Open your Apple Watch app on your phone and go to “My Watch”
2. Go to Settings/General & turn off Automatic App Install.
3. Now go back to “My Watch” and scroll to the bottom to see “Available Apps”.
4. Any apps you see that are trying to install are the culprits causing the notifications!
5. Delete those apps from your phone, and if necessary reinstall them with your Apple ID used currently.
6. Turn Automatic App Install back on if necessary.

You now wont receive any more of those annoying notifications!

I keep getting sign in to complete purchase also. And my watch keeps losing connection with my Bose earbuds. Did the update to iPhone 13 and update on Apple Watch yesterday and these are my biggest annoying problems

It won’t stop and keep sending the same message over and over, I tried so many things to make it stop but i just cant and it really is annoying. I stoped my notification till I find a solution to this.

please help

It's your watch updating apps to the latest version after upgrading the OS. This happens when you have apps installed that weren't "purchased" using the currently logged in Apple ID. E.g. you changed your Apple ID at some stage, but installed apps linked to your initial/original Apple ID. If you enter the credentials for your old/former ID, you should be able to get through this without compromising anything.

It won’t stop and keep sending the same message over and over, I tried so many things to make it stop but i just cant and it really is annoying. I stoped my notification till I find a solution to this.

please help

OK. Here is the fix that worked for me!

1. Open your Apple Watch app on your phone and go to “My Watch”
2. Go to Settings/General & turn off Automatic App Install.
3. Now go back to “My Watch” and scroll to the bottom to see “Available Apps”.
4. Any apps you see that are trying to install are the culprits causing the notifications!
5. Delete those apps from your phone, and if necessary reinstall them with your Apple ID used currently.
6. Turn Automatic App Install back on if necessary.

You now wont receive any more of those annoying notifications!

OK. Here is the fix that worked for me!

1. Open your Apple Watch app on your phone and go to “My Watch”
2. Go to Settings/General & turn off Automatic App Install.
3. Now go back to “My Watch” and scroll to the bottom to see “Available Apps”.
4. Any apps you see that are trying to install are the culprits causing the notifications!
5. Delete those apps from your phone, and if necessary reinstall them with your Apple ID used currently.
6. Turn Automatic App Install back on if necessary.

You now wont receive any more of those annoying notifications!

After you turn off automatic updates in the "App Store" tab did you go back and follow the steps provided above by Waterside Guy?

These are the steps from his list to complete the fix:

1. Now go back to “My Watch” and scroll to the bottom to see “Available Apps”.
2. Any apps you see that are trying to install are the culprits causing the notifications! (Most apps will say "Install" next to them so it should be easy to see which apps are trying to install)
3. Delete those apps from your phone, and if necessary reinstall them with your Apple ID used currently.
4. Turn Automatic App Install back on if necessary.

I hope this helps. I haven't had any issues with the pop-up since I did this.

I finally fixed it! Hope this helps someone else!

1. Go to My Watch
2. General
3. Apple ID
4. I had two different Apple ID’s. One for ICloud and another for ITunes.
5. I reset my password for my ICloud Apple ID and the messages stopped.

I received the same message as my Apple Watch was trying to "Complete a purchase" with my wife's apple ID. This step by step answer helped solve my issue. Thank you Watersideguy for saving me hours of time of trying to work with Apple tech support!

1. Open your Apple Watch app on your phone and go to “My Watch”
2. Go to Settings/General & turn off Automatic App Install.
3. Now go back to “My Watch” and scroll to the bottom to see “Available Apps”.
4. Any apps you see that are trying to install are the culprits causing the notifications!
5. Delete those apps from your phone, and if necessary reinstall them with your Apple ID used currently.
6. Turn Automatic App Install back on if necessary.

Understood - Here's what you can do: Go to the watch app on your phone and disable automatic updates. Now, you'll see which specific updates have failed (i.e. that are associated with an older Apple ID) , so you can delete/remove them and re-download them associated to current Apple ID. Not fun, I know, but it's a fix that works. LMK how you get on?

strangely, I find it imposible to disable automatic updates on the watch app on the iPhone. I slide the toggle, exit, and when I go back to the app store item on the app, the toggle is again on automatic updates... well done apple!

Hi, I'm getting this message a few times per day… aaaaaaaagh!

I checked what you suggested and under General (in Watch app) --> Software Update I dont have unabled automatic updates and still getting this message.

Should I look elsewhere to disable this automatic update and where ca I see this failed updates?

Many thanks for your help.