Version, build number and phased release

Junior PRO

Two numbers

• Version — CFBundleShortVersionString, in build settings MARKETING_VERSION: what the user sees in the App Store, for example 2.4.0. Up to three non-negative integers separated by dots.
• Build number — CFBundleVersion, in build settings CURRENT_PROJECT_VERSION: an internal counter, for example 412 or 2.4.0.412. Every upload to App Store Connect for a version must have a number higher than the previous one; on CI it's taken from the run number.

One version, many builds: 2.4.0 (410) went to TestFlight, a bug was found, 2.4.0 (411) went to review. The user sees only 2.4.0.

let info = Bundle.main.infoDictionary
let version = info?["CFBundleShortVersionString"] as? String ?? "?"
let build = info?["CFBundleVersion"] as? String ?? "?"
print("Version \(version) (\(build))")   // on the About screen and in logs