Mobile app won’t open on iphone

I’m having the same problem. 
It wasn’t letting me login on iPhone it shows error signing in. 

Hi there,

Thanks for reaching out here.  It's important that you're able to access your QuickBooks Online account from anywhere at any time.  I'll be happy to provide more information so you're back to business as soon as possible!

As mentioned by Mtasa, uninstalling and reinstalling the app is recommended in situations such as this.  In addition, you can refresh the app by following these steps;

For iOS;

1. Go to Menu ☰ and tap Help & Feedback and then Refresh Data
2. Tap Refresh to confirm

For Android

1. Tap More Options from the Menu ☰

2. Select Settings and then Refresh Data

3. Click YES to confirm

If the issue persists, log into your QuickBooks account from a web browser at qbo.ca.  

Please don't hesitate to contact us if you require additional assistance.  It would be our pleasure to work with you directly and look further into this from our end.

Schedule a Callback or start a Chat: click (?) Help in the upper right in QuickBooks Online > enter "Contact support" > hit Contact Us > provide a brief summary of your situation > hit Let's Talk > choose Get a callback or Start a Chat.
Social Media: Facebook, Twitter, and Instagram.
Support hours are from Monday to Friday between 9 a.m. and 8 p.m. ET.

If you have any other questions, feel free to reach back out.  We're always glad to assist!

My mobile app will not load.

I have deleted the app and re installed 

all my updates are current on the iphone 

when i sign into QB on the app it just keeps saying "loading your data... this may take a few minutes"  its been two days now. i have tried logging in from other devices and the same message appears. 

yes i can log in on my laptop, but i need the app to work while on the road. and signing into a web browser on my phone is not user friendly and very difficult to navigate.

Hey there Brittany88,

Welcome to the QuickBooks Community. Thanks for joining in on this thread. Being able to access the mobile App without running into any issues is important. I would be happy to point you in the right direction.

I feel you'd benefit more from reaching out to the support team outside of the Community. They'll be able to work directly with you as well as create a ticket to get the issue resolved if they feel it is necessary. You can reach them by following one of these methods:

Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
Social Media: Facebook and Twitter

If you have any other questions, feel free to reach out here.