Hello, we used WedPics and then invited our guests through the app. Guests can upload pics onto the app via their phones/computer/camera. You can take pics through the app but I don’t think any of our guests did.
You do have to pay a fee to download pics, I can’t remember the exact amount but I think it was discounted to about £28,(they offered the discount regularly). Once we paid guests too could have unlimited downloads without them having to also pay. It worked well for us.
Good luck with your planning.