If the TD Canada app is not opening on your iPhone, follow these steps to troubleshoot and potentially resolve the issue:

1. Check for Updates
Ensure that the TD Canada app is up to date. Go to the App Store, tap on your profile icon at the top right, and scroll to see if there are any pending updates for the TD app. If there are, update the app.

2. Restart Your iPhone
Sometimes, a simple restart can resolve app issues. Press and hold the button on the side of your iPhone until you see the "slide to power off" slider. Slide to power off and then turn your phone back on after a few seconds.

3. Clear Background Tasks
Double-click the home button or swipe up from the bottom of the screen (depending on your model) to view apps running in the background. Swipe up on the TD app to close it completely, then try opening it again.

4. Check Your Internet Connection
Make sure your device is connected to the internet, either through Wi-Fi or cellular data. Open a web browser or another app that requires the internet to test the connection.

5. Reinstall the App
If the above steps don’t work, consider uninstalling and reinstalling the app. Tap and hold the TD app icon, select "Remove App," then confirm. Go to the App Store, search for the TD Canada app, and reinstall it.

6. Check for System Updates
Ensure that your iPhone’s operating system is up to date. Go to Settings > General > Software Update. If an update is available, download and install it.

7. Check for Service Outages
It may be worth checking if there are ongoing issues with TD Canada services. You can visit Downdetector to see if others are reporting similar problems - learn more.

8. Contact Support
If the app is still not opening, you may need to contact TD Canada Trust for further assistance. You can call their support line at 1-888-281-0413 for technical help - learn more.

By following these steps, you should be able to troubleshoot most issues preventing the TD app from opening.