Since the last iOS update most of my customers have disappeared and also a lot of my expense and asset categories have too. What gives?

I have fixes here to make your customer available and other categories in QuickBooks Mobile Apps, @p70shooter. This way we can start creating transactions under them and assign categories.

Keeping your application updated is highly recommended to access the most recent features and fixes. In addition, clearing the app data can help resolve common issues that may occur while using the application. This process refreshes the application, giving it a fresh start and enhancing its performance. Please ensure that you are connected to the internet and follow the steps below:

1. Proceed to your phone's settings.
2. Select General, then choose iPhone Storage.
3. Tap QuickBooks Online from the application list.
4. Select Offload App to free up the storage without deleting the documents and data for the app.

If the same happens, you can uninstall and reinstall the mobile app to avoid these unusual behaviors and start fresh.

On the other hand, it will also help us determine if the problem is in the application itself by logging your QBO company file on your mobile web browser and seeing your customer list and missing categories.

Furthermore, I have added an article offering an overview of the app's capabilities. This will help you explore the software effortlessly: QuickBooks Online app overview.

If you require additional help, feel free to leave a comment in this thread. I'm always available to provide you with reliable fixes. Take care!

I have uninstalled data and the problem is still the same. I also uninstalled the app and the problem is still the same. I also tried your suggestion of trying in browser and with that it worked fine so the problem is definitely with the mobile app. The problem has arisen with the last update, before that it worked fine.

We appreciate you for performing the recommended steps provided by my colleague. I'll route you to the support team to help you investigate this further.

To examine this matter thoroughly, you can reach our support team to help you effectively for this. The team has the necessary expertise and tools that can assist you in fixing this concern. Here's how to connect with them:
 

1. In your QBO, click Help and choose Contact Us. For the app, tap the + button and select Ask QB Assistant.
2. Put "talk to a human" and hit Continue.
3. Decide a way you want to be assisted:

• Have us call you - Get a contact from our support.
• Chat with us - Have a conversation with our support.

In the meantime, you can use QBO through your mobile web browser to finish your tasks and determine whether the issue is specific to the application or if it also occurs when using the mobile web browser.

On the other hand, see this reference as a guide to learn more about understanding the chart of accounts in QBO: Learn about the chart of accounts in QuickBooks Online.

Note that we are here to help with the queries you're having. Don't hesitate to drop further questions. We'll get back to you.