Details+ uses Shopify's OS 2.0 app blocks to display published details on your storefront. App block helps to add details to the storefront without altering the theme code. Also keeps your code clean in case of removal of the app. Learn more about app blocks here.
Follow the steps below to add the Details+ app block to your theme. It won't take more than 5 minutes and have to do it only once. Unless there is a change in the store's theme.
Open the Details+ app from your Shopify admin and go to the App block section.
Click on the Open theme editor button to open your current theme in Shopify's theme editor.
Open the product information section on the left panel and click on add block.
Click on Details+ under the apps section.
The app block will be now visible in the preview.
Use the icon buttons to reposition or hide the app block.
Now go back to the app block page and click on the check now button.
The status will show connected if the app block is added.