My app has stopped working, I'm unable to invoice or see past work, how can I retrieve it?

Thank you for bringing this issue to our attention, @benporter84. My goal is to help you retrieve your data as soon as possible so you can get back to your business. 

For most general issues with the QuickBooks Online (QBO) app, clearing the app's cache can help resolve them. By clearing the cache, you can remove historical data and access QuickBooks with a clean slate.

To start, let's refresh your data to see the latest available information in your QBO app to resolve this unexpected behavior. 

Here's how:

iOS

1. Go to Settings, then tap General.
2. Click iPhone Storage, then tap the QuickBooks Online app.
3. Select Offload App.

This will free up the storage without deleting your app's documents and data.

Android

1. Go to Menu ☰, then tap More Options ⋮.
2. Select Settings, then Refresh Data.
3. Click YES to confirm. 

If the issue persists, you can uninstall and reinstall the Online mobile application. Otherwise, you can access your QBO using other supported browsers.

Nevertheless, you can compare mobile app features and see QuickBooks Online access for mobile devices.

Please keep in touch with me if you have further QuickBooks-related concerns apart from QBO app. I'm always delighted to help.