Let me provide insights about your concern. You may want to log in to your account through a web browser to make sure that it's still active. Once you're prompted to resubscribe your QuickBooks Online company. Here are the steps:
Go to Settings and select Billing and Subscription.
Select the Billing and Subscription tab.
Click Resubscribe and enter the updated billing information.
On the other hand, you may also install the free QBO app for iOS. Just click the Get the link button at the upper right corner.
Please get back to me if you need anything else. I'll be right here to help.