UIWebview?

Ah, so these aren’t your apps, and you’re not working on building or troubleshooting the source code of your app (and which is most of what this developer forums community is about), and you here have an unstable iPhone?

First step is to ensure you have sufficient free space to operate with some stability, and to then perform a restart of your iPhone. Running an iPhone near or at its storage capacity is somewhere between unwise and unstable.

Failing that, remove any add-on VPN apps and any add-on security apps, restart the iPhone, and try again.

Failing that, remove the apps involved, restart the iPhone, and re-install the apps.

Failing that, back up your iPhone, reset and reload iOS, and restore your backup. Links to all that and related details are included in the following article: Restore your iPhone, iPad, or iPod to factory settings - Apple Support

Failing all that, contact Apple Support, if a variety of common apps persist in crashing, as it would seem your iPhone has a hardware problem. Use the Get Support link in the upper right of this webpage.

See -> Apple Developer Documentation

zenaida292 wrote: "...strange to my iPhone (...) on my other iPhone..."

zenaida ~ It's useful to indicate the models of iPhones and the versions of iOS they're running:

Settings > General > About > Model Name

Settings > General > About > Software Version

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