AppUpdateTracker is a simple, lightweight iOS library intended to determine basic app install/update behavior. The following is a list of when events are triggered:

• when the user launches the app for the first time, provides:
  • timestamp of when user opened app for the first time, in seconds since epoch
  • installation count representing the number of times the user has opened the app for the first time on the same device
• when the user opens the app for the first time after updating, provides:
  • the previous version the user updated from
  • the current version of the app (provided for convenience)
• when the user brings the app to the foreground, provides:
  • usage count representing how many times the app has been opened (includes bringing app to foreground after resigning active, not only cold start)

This library posts an alert or executes a block with information on one (and only one) of the 3 aforementioned behaviors per app session (each time the app is run).

How to Add to Your Project

The Old Fashioned Way

Merely copy the AppUpdateTracker folder (and its contents) to your project.

Usage

Import AppUpdateTracker.h in your AppDelegate class and register for AppUpdateTracker events within the application:didFinishLaunchingWithOptions: method:

#import "AppUpdateTracker.h"

//...

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.

    [AppUpdateTracker registerForAppUpdatesWithBlock:^(NSString *previousVersion, NSString *currentVersion) {
        NSLog(@"app updated from: %@ to: %@", previousVersion, currentVersion);
    }];
    [AppUpdateTracker registerForFirstInstallWithBlock:^(NSTimeInterval installTimeSinceEpoch, NSUInteger installCount) {
        NSLog(@"first install detected at: %f amount of times app was (re)installed: %lu", installTimeSinceEpoch, (unsigned long)installCount);
    }];
    [AppUpdateTracker registerForIncrementedUseCountWithBlock:^(NSUInteger useCount) {
        NSLog(@"incremented use count to: %lu", (unsigned long)useCount);
    }];

    //...
}

Consult the sample project for more info.

Migration

1.x to 2.0

Potential codebreaking changes:

• Added installCount to first install event, this changes the first install block registration method to + (void)registerForFirstInstallWithBlock:(void (^)(NSTimeInterval installTimeSinceEpoch, NSUInteger installCount))block.
• Changed oldVersion to previousVersion for app updated event, this changes the notification previous version key to kAUTNotificationUserInfoPreviousVersionKey.
• Added currentVersion to app updateded event, this changes the app updated block registration method to + (void)registerForAppUpdatesWithBlock:(void (^)(NSString *previousVersion, NSString *currentVersion))block.
• Changed + (BOOL)getUserUpgradedApp to + (BOOL)getUserUpdatedApp.

License

MIT License

Copyright (c) 2012, Aaron Jubbal All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.