Do CE markings apply to software like apps? Some quick searching seems to indicate it's mostly relevant to embedded software (and most search results are talking about medical devices embedded software).

If you write medical software that runs on an iPhone then your iPhone is now a medical device, subject to CE marking.

That's exactly why I asked, since the parent said "I 'home-made' an iPhone app and gave it a CE mark myself." and I don't know what the CE mark would even mean in that context.

That is a very simple take on the quite complex situation that still differs in different states of the EU.

> That is a very simple take on the quite complex situation that still differs in different states of the EU.

How complicated did you expect me to get in a HN comment?

But I believe it's fact - medical software that measures or calculates on an iPhone gives you a medical device, and a medical device needs to be regulated in the UK, EU, and most other places. I was on the team that did among the first work on regulating this properly.