Hi there, fish4.
If you haven't yet, try to power down and restart your mobile device? Then, install the app again afterwards.
Also, please take note of the system requirements of the app to make sure it works smoothly. Here's an article where you can see the list: QuickBooks Online Access For Mobile Devices.
Just in case you're still getting the same result, I would recommend reaching out to our chat and phone support teams. They can take a closer look at this to determine what's causing the issue and make sure that you're able to install the app. Here's how:
They're open in between Monday to Friday, from 6 AM to 6 PM Pacific Time. I'd also recommend checking out these articles for more reference about using the app:
Don't hesitate to reach out to us again of you need more help with QBO.
Thank you for following up with us and for trying those troubleshooting steps to fix the issue you're having. I have here some additional steps you can perform to isolate this behavior.
First, change the data connection on your device. If you're connected to Wi-Fi, turn it off and use cellular data and vice versa. Then try opening QuickBooks again.
If the same thing happens, you can close and restart the application. Or, clear the app's data.
Just in case the solutions doesn't make any difference, I would suggest getting in touch with our Support Team so a representative can check and investigate this further.
For the steps, please check out the detailed instructions laid out by JenoP above.
Please let me know if you encounter any other issues by leaving a comment below. I want to make sure everything is taken care of for you. Have a great day!
I appreciate all the efforts that you've exhausted just to get this working, fish4.
It seems that all troubleshooting steps have already been shared with you. At this time, I recommend getting in touch with our technical supports. This way, we'll be able to pull up your account in a secure session and then further investigate this issue
Our representatives are available during these hours:
Once it's rectified, you can visit our FAQ page to know the things that you can do with QuickBooks Online mobile app.
Please don't hesitate to add a comment below if there's anything else that I can help you with.
Hello there, fish4. I appreciate you for considering the suggestions shared above.
Our support team may take some time to get in touch with you due to the high volume of a call back request and messaging. Our specialists always want to ensure they'll give the best assistance.
Still, I'd recommend contacting them again to ensure you'll receive a call back as soon as there's an available person to help you out with this matter. It would be very beneficial in this instance because they can look into your specific account in detail and even screen share with you if necessary. You can go through the same steps provided by my colleague KlentB above.
Also, you may want to browse a specific topic in the Online product and learn more about it using this article: QuickBooks Online Help Articles.
Please let me know if you need more help with this. I'm always around to help. Take care and stay safe always.