I appreciate you providing the necessary information, @Bidman.
I can share more details about your concern with the mobile app. I just want to make sure we're giving you the right steps to resolve the issue.
In the meantime, let's reset the data that can resolve common issues when using the mobile app.
If you're using an Android device, go to the More Options ⋮ menu, then select Settings. Tap Refresh Data, and then choose Yes.
Once done, re-open the app and log back into your account. Then, check if you can already use the app again without any issues.
I've also added this article to learn more about the basics in the QuickBooks Online app: QuickBooks Online app overview.
Let me know if you have other concerns. I'll make sure to get back to your right away. Keep safe always.
