Facebook API “This app is in development mode” – Stack Overflow

August 29, 2025

Those basically all mean the same – while an app is in sandbox mode/development mode, so “not live”, only the users added as admins, developers, testers to the app can use it and see content that was created through it. Only when you put it in live mode, every user will be able to use it and see content made via it.

https://stackoverflow.com/questions/21775198/facebook-api-this-app-is-in-development-mode

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