What is the first step to take if an app is crashing on your iPhone?

Restarting the device is often the most effective initial troubleshooting step when an app is crashing on an iPhone. This action clears the memory and stops all processes, which can help resolve temporary glitches that may be causing the app to misbehave. When you restart the device, it provides a fresh start, which can eliminate minor software conflicts or resource allocation issues that might lead to crashes.

By contrast, updating the app, deleting and reinstalling it, or checking for system updates are also valid troubleshooting methods, but they are typically subsequent steps taken if restarting doesn't resolve the issue. Restarting the device is quick and easy, making it an ideal first step in addressing app crashes. This approach aligns with general best practices in troubleshooting, where simple solutions are prioritized before moving on to more complex ones.