Im not sure if you are aware but you do not have to create a new Account on there. Photon is another client just like Summit is, so you can login using your piefed.social account. Sadly im not on android anymore but will be coming back soon! There are couple to choose from, just from the looks i like sync and interstellar but im not sure how well they support piefed. Lemmy was first so it was first supported.

https://join.piefed.social/docs/piefed-mobile/ https://piefed.social/community/fediverse/wiki/piefed-app