Smart Front Back Dual Camera for Android - Insert your selfie into photos you take
OK it's not quite what Samsung offered with its instant one-click photo that inserted your selfie into the main photo but it achieves the same results and does actually work on my Pixel 2 XL. It does also allow you to choose the border type for the insert and move around its position.
Yes, there is a catch... the selfie photo is taken with a delay. It defaults to 1000ms but you can try change this in the settings. It is livable for me though as it follows after the main photo is taken.
|Smart Front Back Dual Camera - Apps on Google Play