Hi there! I'm sorry to hear that you're having trouble with the BorrowBox app on your iPhone. It must be frustrating when it works perfectly on your iPad but not on your phone. Let's figure this out together.

First, could you tell me a bit more? When does the app crash—does it happen when you open it, or when you're trying to download an audiobook or eBook?

In the meantime, here are a few steps that often help resolve app crashes:

1. Restart Your iPhone: Sometimes, a simple restart can do wonders. Just turn off your iPhone and turn it back on.

2. Force Quit the App: If the app is still crashing, swipe up from the bottom of the screen (or double-click the Home button if you have one) to view your open apps. Swipe up on the BorrowBox app to close it completely.

3. Update the App: Make sure you have the latest version of the BorrowBox app installed. You can check for updates in the App Store.

4. Delete and Reinstall the App: If the above steps don't help, you might want to delete the app and then reinstall it. To do this, press and hold the app icon until it wiggles, then tap the "X" to delete. After that, go to the App Store and install it again.

5. Check Available Storage: Sometimes, low storage can cause apps to crash. Go to Settings > General > iPhone Storage and see if you have enough space.

If you try these steps and the issue persists, please let me know, and we can look into more advanced troubleshooting or contact BorrowBox support directly.

Are you satisfied with the solution I provided so far?