To address the issue of the Purp app crashing upon opening, you can follow these detailed steps:

1. Restart Your Device: Begin by restarting your iPhone. This helps clear temporary files and can resolve minor glitches that may be causing the app to crash.

2. Update the App: Make sure that you are running the latest version of the Purp app. Go to the App Store, search for Purp, and check if an update is available. Updating can fix bugs that might be causing crashes.

3. Check for iOS Updates: Ensure your operating system is up to date. Navigate to Settings > General > Software Update. If there is an update available for iOS, install it.

4. Force Quit the App: If the app is open, swipe up from the bottom of the screen and pause in the middle to view the app switcher. Find Purp and swipe it up to close it completely. Then, try reopening the app.

5. Clear Cache: While iOS does not have a clear cache option like Android, you can try to offload the app. Go to Settings > General > iPhone Storage. Find the Purp app, and select Offload App. This will remove the app without deleting its documents and data. Reinstall it after offloading.

6. Reinstall the App: Delete the Purp app from your device. Long-press the app icon until options appear, then select Remove App and confirm. After this, reinstall the app by visiting the App Store.

7. Check Internet Connection: A poor or unstable internet connection can cause the app to crash. Make sure you are connected to a strong Wi-Fi network or have a stable mobile data connection.

8. Close Background Apps: Too many apps running in the background can use resources needed by Purp. Close unused apps by swiping up from the bottom and swiping up on any app you want to close.

9. Contact Support: If the issue persists after following the above steps, consider reaching out to the Purp app support for assistance. They may provide specific solutions for known issues.

If you're interested in a visual guide, you can refer to a brief video on how to fix app crashes, which covers similar steps - learn more.

Following these steps should help resolve the crashing issue with the Purp app.