Best way to sync photo's between NAS and multiple devices?

[Goose]

I've just setup my first Synology (Xpenology) NAS and I want to sync photo's between the NAS, two laptops on the local network and two laptops and iPhone's not on the local network. Are the stock Synology apps good enough or are there third party apps/programs that do a better job?

Thanks

 

[Goose]

Thanks for the suggestions guys, will have a look at both options