The app keeps crashing when I try to go into categorised transactions. I’ve also noticed that when categorising new transactions a lot of the categories have disappeared

I appreciate you posting in the Community, Ich-bin. Let me ensure that you can access your categorised transactions.

Let's perform basic troubleshooting on your account to determine where the problem lies. Here's how to do it on different mobile operating systems:

Android:

1. Go to Menu ☰ then tap More Options ⋮.
2. Select Settings, then Refresh Data.
3. Tap Yes.

iOS:

1. Go to the Menu ☰ icon, then select Help & Feedback.
2. Tap Refresh Data.
3. Select Refresh.

You can also do it in your device settings.

Android:

1. Go to the Settings menu.
2. Select Apps (varies by device), then choose QuickBooks app from the list Storage.
3. Select Clear data.

iOS:

1. From your device's Settings, select Setting General iPhone Storage.
2. Choose an app that's taking up a lot of space.
3. Click the Offload App.

Once done, we can restart your device and reopen your QBO mobile app to double-check. If the issue persists, I suggest you uninstall it and then reinstall the app.

If the issue remains, I recommend contacting our support team to have your account checked. Here's how to reach them:

1. Log in to your QuickBooks Online company.
2. Select Help (?).
3. In QB Assistant, enter the topic you need help with. You can also enter questions.
4. In Search, select Contact Us to connect with a live support agent.
5. Choose a way to connect with us:
   • Start a chat with a support expert. Live chat all day, M-F.
   • Ask the Community to get help from businesses like yours.
   • Call us. M-F, 8:00 AM to 10:00 PM and S-S, 8:00 AM to 6:00 PM.

As a workaround, you can also try opening your account on a web browser and accessing your categorised transactions from there.

For future reference, refer to this article to review your accounts in QuickBooks to make sure they match your bank and credit card statements: Reconcile an account in QuickBooks Online.

Feel free to return to this thread anytime if you have further questions about the categorised transactions or QuickBooks in general. I'll be more than happy to assist.