Camera App with Transparent Overlay Feature

Hey Folks,

Hope you are all well. Long time no visit for me, but I had a weird question that I am struggling to answer and thought somebody here may be able to help.

I am looking for a camera app for my phone (either Android or iOS) that has the ability to show an existing picture with a degree of transparency when looking through the viewfinder [so to speak] at what the lens is currently seeing. In a nutshell, we have some pictures of our garden and having done a ton of work, I would like to do some before and after pictures. Ideally though I would like them to be as identical in terms of position and direction as possible. To me, the simplest way to achieve this would be to have a transparent existing picture to use to line up with when taking a new picture.

Whatever I search for though is not giving me what I am looking for. It is more than likely me that's the problem, but has anybody seen this or know of an app that can do it?

Thanks in advance!

Cheers,
Matrel