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Fitbit Google Login not working in iOS platform

I'm currently facing an issue with Fitbit login on iOS devices. When attempting to log in using a Google account on the Fitbit OAuth page, the page keeps redirecting back to the Fitbit OAuth page after selecting google account, creating a loop. This behavior occurs only on iOS — everything works as expected on Android.

Setup Details:

Framework: Flutter

API Used: Fitbit Web API

Authorization URL Used: https://www.fitbit.com/oauth2/authorize?response_type=code&client_id=23Q3Y9&redirect_uri=mndprs-hesoyam38-fitbit://fitbit/auth&scope=activity%20cardio_fitness%20heartrate%20location%20nutrition%20profile%20settings%20sleep%20social%20oxygen_saturation%20respiratory_rate%20temperature&expires_in=10080

What I've Tried: The login flow works perfectly on Android. The issue only occurs on iOS when logging in with a Google account on the Fitbit OAuth page. No errors are thrown; it simply keeps redirecting back to the login page.

Video link of what's happening

https://drive.google.com/file/d/1yaQCkfgW11Q5yBz4zJSr2Z1Q83gsAbnv/view?usp=sharing

Question: What could be causing this redirect loop on iOS? Is there a platform-specific configuration or redirect URI handling issue that I might be missing?

Any help would be greatly appreciated!

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Even after adding the scheme, the problem didn't solve. What i also tried is changed my scheme from mndprs-hesoyam38-fitbit://fitbit/auth to mndprs://fitbit/auth and it is somehow working. Don't know why this behaviour, but i am not getting the loop issue since that change. Hopefully this resolves!

bharat8
– bharat8

2025年05月03日 01:33:17 +00:00
Commented May 3, 2025 at 1:33
@bharat8 I am integrating Fitbit outh in flutter. I am slo facing similar problem in IOS. After 4-5 google sign in attempts only I am able to sign in. My redirect URI is com.mycompany.myapp://callback how to use it in info.plist

Prabhu M
– Prabhu M

2025年07月21日 07:13:01 +00:00
Commented Jul 21, 2025 at 7:13

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Fitbit Google Login not working in iOS platform

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