I can’t log into app on iPad when try to sign in it just shows the rotating star but never gets beyond, working fine on phone and desktop

Hi dannymorris1000-,

Let's run some steps to identify why you're unable to login on an application.

Clearing the app data helps fix some issues causes by stored cache . Here's how:

1. Go to the Menu ☰
2. Select Help & Feedback
3. Click Refresh Data
4. Then select Refresh.

Here's an article you can read for more details about this process: Troubleshooting Quick-Start Guide for the QuickBooks Online app.

 I'll be around if you need help. Have a great day!