I'll take care of this at the soonest moment, @9029937667.
Solving the QuickBooks Online app takes slowly to open, which is my focus here. Let's get your mobile app up and running by ensuring that your Android is updated or iOS version is 14.0 or later. Also, ensure that your internet connection is fast to avoid delays in opening the app.
Once confirmed and the issue persists, let's reset your mobile app. This is the same as clearing the cache from your web browser.
For Android devices:
Go to the Home tab or click the three dots on the right side, then select the Settings tab.
Choose the Refresh Data menu.
Hit Yes.
For iOS:
Go to the Help menu.
Select Reset App Data.
Click OK.
If the problem continues, let's uninstall and reinstall the app for a clean slate. You do not need to worry since it won't delete any of your app's transactions or data.
Here's how:
On your homepage, touch and hold the QuickBooks app.