Hello chuck_1965,
Thanks for reaching out to the Apple Support Communities! We understand you are experiencing some issues with your iPhone freezing and becoming unresponsive when using an app. We are happy to help provide some guidance.
To start, we would recommend trying to force restart the iPhone the next time you experience the device freezing. You can see how to do that in this article:
If your iPhone, iPad, or iPod touch won't turn on or is frozen
If the behavior continues, we'd like to ask some additional questions to get a better understanding.
- What is the exact iOS version showing in Settings > General > About
- What happens when the device freezes exactly? Does it show a black screen or an Apple Logo, or just remain in the Camera app?
Keep us updated on how it goes.
Best Regards.