Track which versions of your Xamarin.iOS, Xamarin.Mac, Xamarin.Android, or Windows app a user has previously installed.

• Available on NuGet: https://www.nuget.org/packages/Plugin.VersionTracking/
• Install into your PCL/.NET Standard project and Client projects.
  (fuctionality is exposed through a built-in Singleton, no dependency service required)

Supports both classic Xamarin.iOS / Xamarin.Android and Xamarin.Forms

Call this on each app launch inside DidFinishLaunching (Xamarin.iOS), FinishedLaunching (Xamarin.Mac), or the MainActivity's OnCreate (Xamarin.Android)

CrossVersionTracking.Current.Track ();

Then call these whenever you want (in these examples the user has launched a bunch of previous versions, and this is the first time he's launched the new version 1.0.11):

var vt = CrossVersionTracking.Current; vt.IsFirstLaunchEver; // false vt.IsFirstLaunchForVersion; // true vt.IsFirstLaunchForBuild; // true vt.CurrentVersion; // 1.0.11 vt.PreviousVersion; // 1.0.10 vt.FirstInstalledVersion; // 1.0.0 vt.VersionHistory; // [ 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.10, 1.0.11 ] vt.CurrentBuild; // 18 vt.PreviousBuild; // 15 vt.FirstInstalledBuild; // 1 vt.BuildHistory; // [ 1, 2, 3, 4, 5, 8, 9, 10, 11, 13, 15, 18 ]

Or set up actions to be called on the first lauch of a specific version or build:

var vt = CrossVersionTracking.Current; vt.OnFirstLaunchOfBuild ("18", () => Console.WriteLine ("First time Build 18 launched!")); vt.OnFirstLaunchOfVersion ("1.0.11", () => Console.WriteLine ("First time Version 1.0.11 launched!"));

• Colby Williams
• Originally inspired by GBVersionTracking

The MIT License (MIT) Copyright © 2017 Colby Williams