If they're the apps that come with the Apple devices, then everyone with an Apple device has already got them and they're designed to work with iCloud.Explain it to me because I didn’t realize you could share apps with as many people and devices as you wanted.
https://support.apple.com/guide/mac-help/built-in-apps-mchl110b00b7/mac
If it's a commercially available app -- something like, say, Serif Affinity Designer -- then the application will need to be purchased for each user, but that application's data can then be shared via iCloud.