macOS/IOS photo organizer besides Photos

[tpf1000]

I'm already using Photos on my MacBook and my iPad for ordinary photo storage and organization. I use my iPad while teaching children math and while interacting with friends and family, sometimes taking and sharing photos of pages of math notes and such.

I want to start taking and organizing some more risque photos---photos that I wouldn't want my math students to see by mistake.

I like to do that outside Photos, therefore. Can anyone recommend a good app for photo organization that would function on my MacBook and iPad with cloud synchronization?

Mike