We appreciate you for getting in touch with the Community, Justtall.

I understand that missing functionalities, like sales receipts disappearing in the QuickBooks mobile app, may occur at times. I'd be glad to discuss this in detail and guide you on how to fix this.

The QBO mobile app should always sync with the web version. To begin with, start by refreshing your data to ensure you have the latest software updates in your app. Please keep in mind that updating your data should be seamless as long as you have an internet connection.

Here's how to do it on different mobile operating systems:

iOS (iPhone/iPad):

1. Go to Settings, then tap General.
2. Select iPhone Storage, then tap the QuickBooks Online app.
3. Tap Offload App.
4. This will free up the storage without deleting your app documents and data.

Android:

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

After completing the steps, close and reopen the mobile app to check for the missing functionalities. Additionally, you may consider restarting your phone. If the issue persists, uninstall and reinstall the application to start afresh. Follow these steps to delete it:

1. Tap and hold QuickBooks Online on your phone.
2. Drag the app to the Uninstall section.
3. Click Yes to confirm.

For a comprehensive understanding of reinstalling the QBO mobile app, I recommend referring to this article: How to download the QuickBooks Online mobile app.

Additionally, you may refer to this article for more insights on some of the main features of the QBO mobile app: Compare Mobile App Features.

Feel free to reach out if you have any further questions about mobile app-related concerns in QuickBooks Online. I'm here to assist. Cheers!