Sean Allen is a US iOS developer and educator behind the Sean Allen YouTube channel — one of the larger independent iOS / Swift channels online, focused on practical SwiftUI development and the iOS-engineer career track.
His CourseFlix listing carries Dub Dub Grub — An Intermediate SwiftUI Course with MapKit and CloudKit. Material is paid and aimed at iOS developers building real SwiftUI apps that integrate Apple's MapKit and CloudKit frameworks.
