One difference between Android and iPhone is that when an NFC tag is tapped that contains a URL it will bring up the URL in your default browser on Android, but with an iPhone you get an extra prompt from Safari asking if you wish to open the URL.  This is not such a nice look, but since IOS 14 as a developer you can create an App Clip which is a small applet and if it is asscoiated with a URL.  The user gets a neat dialogue with a picture and options for next such as open on a browser or open the app.

We have seen clients using this when we test tags we have encoded for them and it really does make such a difference to the user experience.

Worth looking in to if you have your own application on IOS. The developer documentation can be found here: CLICK HERE

Android has a similar capabilty and works via the URL, so it is possible to encode with a URL works on both Android and IOS with a neat look.