If you are experiencing technical issues with the TruckSmart app that prevent you from accessing your UltraONE information, follow these steps to troubleshoot the problem:

1. Check Internet Connection:
- Ensure that your device has a stable internet connection. Switch between Wi-Fi and mobile data to see if the issue persists.

2. Update the App:
- Make sure you are using the latest version of the TruckSmart app. Go to the App Store on your iPhone and check for any available updates. To do this:
- Open the App Store.
- Tap on your account icon at the top right.
- Scroll down to find the TruckSmart app under 'Available Updates' and tap 'Update' if available.

3. Restart the App:
- Close the TruckSmart app completely:
- Swipe up from the bottom of the screen (or double-click the Home button on older iPhones) to see the app switcher.
- Find the TruckSmart app and swipe it up to close it.
- Open the app again and see if it resolves the issue.

4. Clear App Cache:
- While iOS does not allow you to directly clear cache, reinstalling the app can help.
- Delete the TruckSmart app by pressing and holding the app icon and selecting 'Remove App' then 'Delete App'.
- Reinstall it from the App Store.

5. Check for System Status:
- Visit the official TravelCenters of America website or their social media pages to check if there are ongoing issues with the app. Sometimes developers may post updates regarding technical difficulties or maintenance schedules.

6. Contact Customer Support:
- If the problem continues, reach out to TruckSmart’s customer support for assistance. You can call them at 1-800-632-9240, available Monday through Friday from 9 am to 9 pm ET - learn more.

7. Social Media Updates:
- Keep an eye on their official social media accounts for potential updates regarding app issues. You can check Twitter at @TATravelCenters for any announcements - learn more.

Following these steps should help you resolve the technical issues with the TruckSmart app regarding your UltraONE account. If the issue is with the app's servers, it may take some time for it to be fixed on their end.