My app is running super slow. Deleted then re installed already. My device has lots of space so not that either, any ideas?

I can provide some details on utilizing the QuickBooks Online mobile app, @sa-hadleyeng-icl.

Try to determine whether you're using an Android or iOS-compatible mobile operating system for smartphones and tablets. Please refer to the details I'll be sharing below.

iPhone / iPad:

• OS 11.1 or newer
• Safari browser. Just make sure Private Mode is off to allow cookies.
• Although not officially supported, other browsers like Chrome and Dolphin could function.

Android smartphones and tablets:

• Nougat 7.1.1 or newer
• Chrome browser
• Other browsers, such as Firefox and Opera, may work but aren't officially supported.

For more information about minimum operating systems and internet speeds and supported web browsers that work well with QBO, check out this article: System requirements for QuickBooks Online, Accountant, Payroll, and QuickBooks Self-Employed. 

Using a compatible web browser (Google Chrome, Mozilla Firefox, Microsoft Edge, Safari), you can also try accessing your QuickBooks Online (QBO) account using this link: Sign in.

If you need any additional assistance with your QBO mobile app, please leave a reply below. Enjoy the rest of your day!