Firebase iOS Version breakdown

firebase-iOS-breakdown.swift

// How to:
// 1. Go in the Firebase Analytics Dashboard
// 2. Filter iOS Platform only
// 3. Scroll down, select `Device` under the "What is your audience like?" widget
// 4. Export the CSV data (top right corner, there's a download button with Download CSV option)
// 5. Open the file and select the iOS breakdown raw data
// 6. Replace your data with the sample data in this script
// 7. Run the script in a Xcode Playground
// 8. See the terminal output

import Foundation

var data = """
ios 13.1.3,38215
iOS 13.1.3,14333
ios 13.2.3,12667
iOS 13.2.3,9568
ios 12.4.1,8392
ios 13.2.2,6816
ios 13.1.2,6652
ios 13.2,5439
ios 12.4.2,4008
ios 12.4.3,3715
iOS 12.4.1,3111
ios 12.3.1,3021
iOS 13.1.2,2514
iOS 12.4.3,2455
"""

let lines = data.split { $0.isNewline }

var iOSDictionary: [String: Int] = [:]

for line in lines {
    let iOSVersion: String = String(line.split(separator: ".").first!).lowercased()
    let numberOfUsers = Int(line.split(separator: ",").last!)!
    iOSDictionary[iOSVersion, default: 0] += numberOfUsers
}

let totalUsers: Int = iOSDictionary.values.reduce(into: 0, { $0 += $1 })

for (iOSVersion, numberOfUsers) in iOSDictionary {
    let percent = String(format: "%.2f", Double(numberOfUsers) / Double(totalUsers) * Double(100))
    print("\(iOSVersion): \(percent)%")
}