Is there any insurance app for apple watch?

Hello,

Can you explain some more what you mean by insurance app?

If you're wanting to buy AppleCare+ look at this article:

AppleCare+ for Apple Watch

You can search Apps made for the Apple Watch in two ways:

1. Open Watch(app on iPhone) > App Store or Search, here you will find Apps
2. While looking on the App Store you will see something that says "Offers Apple Watch App" under the App icon. Picture below:

Here's an article:

Use apps on your Apple Watch - Apple Support

Hi

To search for apps that include support for Apple Watch, use the Search or App Store tabs in the Watch app on the paired iPhone.