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IOS app closes immediately when trying to open

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Starting today (6/26/2025), when I try to open the Fitbit app on my iPhone, it appears briefly then closes.  I checked the app store and there was an update available (4.46) and I updated.  Same issue. (iPhone is up to date - ios 18.5)

I've tried all the possible solutions I've been able to find online - shutting off/restarting my phone, deleting/reinstalling the app, opening the app with wifi & bluetooth disabled.  Nothing helps.

I also have the Windows 11 app, which I don't normally use, but when I tried it just now I get an error logging on.  Not sure if that's related.  I let it generate logs which I can send if you think that will help.

One additional data point - my husband has the same model phone & fitbit, and he is able to open the app with no problems.

Can you please help?

Editing to add:  after I posted this, I realized this didn't go directly to Fitbit Support, so I contacted them directly and I have a case open.  I'll come back and update if I get a solution.

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Welcome to the community forums, @YMMV.

Thanks for the detailed information, and every step that you've tried on your own. I'm glad you got in touch with our Support team. Please keep in close communication with them, as I'm sure they will be happy to assist you further.

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I opened a case for this.  As time went on, it became clear that the app was crashing only when I tried to access my data (dashboard or sleep details) for Thursday 6/26/2025.  I kept them updated via email as instructed but never got any feedback and apparently the case was closed with no further response to me from Fitbit.  When I followed up today, I was told that this is a wider issue and their team is aware of it.  Hope this will help someone.

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