Yes, it is possible to create a redirect in Webflow that instantly sends users to the App Store or Play Store link if they access your website from an iPhone or Android device.
To achieve this, you can use custom code and JavaScript within the Webflow project. Here's a step-by-step guide:
1. First, you need to identify the user's device when they visit your website. You can use JavaScript to check the user agent string and determine if it is an iPhone or an Android device.
2. In Webflow, navigate to the page where you want to add the redirect. Open the page settings by clicking on the page name in the Pages panel.
3. Scroll down to the head tag section in the page settings and click on the "Add custom code" button.
4. Add the following JavaScript code within the head tag section:
```javascript
```
Make sure to replace "YOUR_APP_STORE_LINK" with the actual URL of your app in the App Store and replace "YOUR_PLAY_STORE_LINK" with the URL of your app in the Play Store.
5. Save the changes and publish your Webflow project. Now, when users access the page from an iPhone or Android device, they will be redirected to the respective app store link.
It's worth mentioning that the above code will only redirect users if they access the specific page where you added the code. If you want to redirect users from any page on your website, you can consider adding the code in the Site-wide custom code section in the Project settings.
Remember to test the behavior on different devices to ensure it works as expected before deploying it to a live website.