diff --git a/Adjust.podspec b/Adjust.podspec
index c6712c7c4..0922a6fa7 100644
--- a/Adjust.podspec
+++ b/Adjust.podspec
@@ -1,14 +1,14 @@
 Pod::Spec.new do |s|
   s.name           = "Adjust"
-  s.version        = "3.3.0"
+  s.version        = "3.3.1"
   s.summary        = "This is the iOS SDK of Adjust. You can read more about it at http://adjust.io."
   s.homepage       = "http://adjust.io"
   s.license        = { :type => 'MIT', :file => 'MIT-LICENSE' }
   s.author         = { "Christian Wellenbrock" => "welle@adjust.com" }
-  s.source         = { :git => "https://github.com/adeven/adjust_ios_sdk.git", :tag => "v3.3.0" }
+  s.source         = { :git => "https://github.com/adeven/adjust_ios_sdk.git", :tag => "v3.3.1" }
   s.platform       = :ios, '4.3'
   s.framework      = 'SystemConfiguration'
-  s.weak_framework = 'AdSupport'
+  s.weak_framework = 'AdSupport', 'iAd'
   s.source_files   = 'Adjust/*.{h,m}', 'Adjust/AIAdditions/*.{h,m}'
   s.requires_arc   = true
 end
diff --git a/Adjust.xcodeproj/project.pbxproj b/Adjust.xcodeproj/project.pbxproj
index 9a04e31ff..e07a33dcb 100644
--- a/Adjust.xcodeproj/project.pbxproj
+++ b/Adjust.xcodeproj/project.pbxproj
@@ -7,6 +7,10 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		96325E89190E892000A97911 /* iAd.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 96325E86190E5CE400A97911 /* iAd.framework */; settings = {ATTRIBUTES = (Weak, ); }; };
+		96325E8A190E892600A97911 /* AdSupport.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 96325E84190E5CD900A97911 /* AdSupport.framework */; settings = {ATTRIBUTES = (Weak, ); }; };
+		96325E8B190E8D6200A97911 /* iAd.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 96325E86190E5CE400A97911 /* iAd.framework */; settings = {ATTRIBUTES = (Weak, ); }; };
+		96325E8C190E8D6B00A97911 /* AdSupport.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 96325E84190E5CD900A97911 /* AdSupport.framework */; settings = {ATTRIBUTES = (Weak, ); }; };
 		9679921118BBAE2800394606 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9679921018BBAE2800394606 /* Foundation.framework */; };
 		9679921F18BBAE2800394606 /* XCTest.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9679921E18BBAE2800394606 /* XCTest.framework */; };
 		9679922018BBAE2800394606 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9679921018BBAE2800394606 /* Foundation.framework */; };
@@ -67,6 +71,8 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		96325E84190E5CD900A97911 /* AdSupport.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = AdSupport.framework; path = System/Library/Frameworks/AdSupport.framework; sourceTree = SDKROOT; };
+		96325E86190E5CE400A97911 /* iAd.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = iAd.framework; path = System/Library/Frameworks/iAd.framework; sourceTree = SDKROOT; };
 		9679920D18BBAE2800394606 /* libAdjust.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libAdjust.a; sourceTree = BUILT_PRODUCTS_DIR; };
 		9679921018BBAE2800394606 /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = System/Library/Frameworks/Foundation.framework; sourceTree = SDKROOT; };
 		9679921D18BBAE2800394606 /* AdjustTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = AdjustTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -129,6 +135,8 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				96325E8A190E892600A97911 /* AdSupport.framework in Frameworks */,
+				96325E89190E892000A97911 /* iAd.framework in Frameworks */,
 				9679921118BBAE2800394606 /* Foundation.framework in Frameworks */,
 				96E5E3B918BBB75F008E7B30 /* XCTest.framework in Frameworks */,
 			);
@@ -138,6 +146,8 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				96325E8C190E8D6B00A97911 /* AdSupport.framework in Frameworks */,
+				96325E8B190E8D6200A97911 /* iAd.framework in Frameworks */,
 				9679922518BBAE2800394606 /* libAdjust.a in Frameworks */,
 				9679921F18BBAE2800394606 /* XCTest.framework in Frameworks */,
 				9679922218BBAE2800394606 /* UIKit.framework in Frameworks */,
@@ -170,6 +180,8 @@
 		9679920F18BBAE2800394606 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				96325E86190E5CE400A97911 /* iAd.framework */,
+				96325E84190E5CD900A97911 /* AdSupport.framework */,
 				9679921018BBAE2800394606 /* Foundation.framework */,
 				9679921E18BBAE2800394606 /* XCTest.framework */,
 				9679922118BBAE2800394606 /* UIKit.framework */,
@@ -421,8 +433,9 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 7.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 7.1;
 				ONLY_ACTIVE_ARCH = YES;
+				OTHER_CFLAGS = "-DADJUST_NO_IDA";
 				SDKROOT = iphoneos;
 			};
 			name = Debug;
@@ -452,7 +465,8 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 7.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 7.1;
+				OTHER_CFLAGS = "-DADJUST_NO_IDA";
 				SDKROOT = iphoneos;
 				VALIDATE_PRODUCT = YES;
 			};
@@ -505,6 +519,7 @@
 					"$(inherited)",
 				);
 				INFOPLIST_FILE = "AdjustTests/AdjustTests-Info.plist";
+				OTHER_CFLAGS = "-DADJUST_NO_IDA";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				WRAPPER_EXTENSION = xctest;
 			};
@@ -521,6 +536,7 @@
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "AdjustTests/Adjust-Prefix.pch";
 				INFOPLIST_FILE = "AdjustTests/AdjustTests-Info.plist";
+				OTHER_CFLAGS = "-DADJUST_NO_IDA";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				WRAPPER_EXTENSION = xctest;
 			};
diff --git a/Adjust/AIActivityHandler.m b/Adjust/AIActivityHandler.m
index 2b8008cf1..c0c4731b8 100644
--- a/Adjust/AIActivityHandler.m
+++ b/Adjust/AIActivityHandler.m
@@ -17,6 +17,9 @@
 #import "UIDevice+AIAdditions.h"
 #import "NSString+AIAdditions.h"
 #import "AIAdjustFactory.h"
+#if !ADJUST_NO_IDA
+#import <iAd/iAd.h>
+#endif
 
 static NSString   * const kActivityStateFilename = @"AdjustIoActivityState";
 static NSString   * const kAdjustPrefix          = @"adjust_";
@@ -44,6 +47,8 @@ @interface AIActivityHandler()
 @property (nonatomic, copy) NSString *clientSdk;
 @property (nonatomic, assign) BOOL trackingEnabled;
 @property (nonatomic, assign) BOOL internalEnabled;
+@property (nonatomic, assign) BOOL isIad;
+@property (nonatomic, copy) NSString *vendorId;
 
 @end
 
@@ -163,6 +168,15 @@ - (void)initInternal:(NSString *)yourAppToken {
     self.idForAdvertisers = UIDevice.currentDevice.aiIdForAdvertisers;
     self.fbAttributionId  = UIDevice.currentDevice.aiFbAttributionId;
     self.userAgent        = AIUtil.userAgent;
+    self.vendorId         = UIDevice.currentDevice.aiVendorId;
+
+#if !ADJUST_NO_IDA
+    if (NSClassFromString(@"ADClient")) {
+        [ADClient.sharedClient determineAppInstallationAttributionWithCompletionHandler:^(BOOL appInstallationWasAttributedToiAd) {
+            self.isIad = appInstallationWasAttributedToiAd;
+        }];
+    }
+#endif
 
     self.packageHandler = [AIAdjustFactory packageHandlerForActivityHandler:self];
     [self readActivityState];
@@ -430,6 +444,8 @@ - (void)injectGeneralAttributes:(AIPackageBuilder *)builder {
     builder.idForAdvertisers = self.idForAdvertisers;
     builder.fbAttributionId  = self.fbAttributionId;
     builder.environment      = self.environment;
+    builder.isIad            = self.isIad;
+    builder.vendorId         = self.vendorId;
 
     if (self.trackMacMd5) {
         builder.macShortMd5 = self.macShortMd5;
diff --git a/Adjust/AIAdditions/UIDevice+AIAdditions.h b/Adjust/AIAdditions/UIDevice+AIAdditions.h
index 82991681e..d5eb3624b 100644
--- a/Adjust/AIAdditions/UIDevice+AIAdditions.h
+++ b/Adjust/AIAdditions/UIDevice+AIAdditions.h
@@ -17,5 +17,6 @@
 - (NSString *)aiDeviceType;
 - (NSString *)aiDeviceName;
 - (NSString *)aiCreateUuid;
+- (NSString *)aiVendorId;
 
 @end
diff --git a/Adjust/AIAdditions/UIDevice+AIAdditions.m b/Adjust/AIAdditions/UIDevice+AIAdditions.m
index 929fca3c6..7fca35709 100644
--- a/Adjust/AIAdditions/UIDevice+AIAdditions.m
+++ b/Adjust/AIAdditions/UIDevice+AIAdditions.m
@@ -158,4 +158,9 @@ - (NSString *)aiCreateUuid {
     return lowerUuid;
 }
 
+- (NSString *)aiVendorId {
+    NSString * vendorId = [UIDevice.currentDevice.identifierForVendor UUIDString];
+    return vendorId;
+}
+
 @end
diff --git a/Adjust/AIPackageBuilder.h b/Adjust/AIPackageBuilder.h
index 8e356664a..91c1bd423 100644
--- a/Adjust/AIPackageBuilder.h
+++ b/Adjust/AIPackageBuilder.h
@@ -22,6 +22,8 @@
 @property (nonatomic, copy) NSString *clientSdk;
 @property (nonatomic, copy) NSString *uuid;
 @property (nonatomic, assign) BOOL trackingEnabled;
+@property (nonatomic, assign) BOOL isIad;
+@property (nonatomic, copy) NSString *vendorId;
 
 // sessions
 @property (nonatomic, assign) int sessionCount;
diff --git a/Adjust/AIPackageBuilder.m b/Adjust/AIPackageBuilder.m
index d52ffafef..0f01fdf8f 100644
--- a/Adjust/AIPackageBuilder.m
+++ b/Adjust/AIPackageBuilder.m
@@ -88,6 +88,8 @@ - (NSMutableDictionary *)defaultParameters {
     [self parameters:parameters setString:self.fbAttributionId  forKey:@"fb_id"];
     [self parameters:parameters setString:self.environment      forKey:@"environment"];
     [self parameters:parameters setInt:self.trackingEnabled     forKey:@"tracking_enabled"];
+    [self parameters:parameters setBool:self.isIad              forKey:@"is_iad"];
+    [self parameters:parameters setString:self.vendorId         forKey:@"idfv"];
 
     // session related (used for events as well)
     [self parameters:parameters setInt:self.sessionCount         forKey:@"session_count"];
@@ -167,5 +169,12 @@ - (void)parameters:(NSMutableDictionary *)parameters setDictionaryJson:(NSDictio
     [self parameters:parameters setString:dictionaryString forKey:key];
 }
 
+- (void)parameters:(NSMutableDictionary *)parameters setBool:(BOOL)value forKey:(NSString *)key {
+    if (value < 0) return;
+
+    int valueInt = [[NSNumber numberWithBool:value] intValue];
+
+    [self parameters:parameters setInt:valueInt forKey:key];
+}
 @end
 
diff --git a/Adjust/AIUtil.m b/Adjust/AIUtil.m
index ef7c9cac7..a5af099ae 100644
--- a/Adjust/AIUtil.m
+++ b/Adjust/AIUtil.m
@@ -14,7 +14,7 @@
 #include <sys/xattr.h>
 
 static NSString * const kBaseUrl   = @"https://app.adjust.io";
-static NSString * const kClientSdk = @"ios3.3.0";
+static NSString * const kClientSdk = @"ios3.3.1";
 
 static NSString * const kDateFormat = @"yyyy-MM-dd'T'HH:mm:ss'Z'Z";
 static NSDateFormatter * dateFormat;
diff --git a/AdjustTests/AIActivityHandlerTests.m b/AdjustTests/AIActivityHandlerTests.m
index 5310b5efd..40cda79f3 100644
--- a/AdjustTests/AIActivityHandlerTests.m
+++ b/AdjustTests/AIActivityHandlerTests.m
@@ -88,7 +88,7 @@ - (void)testFirstRun
     AIActivityPackage *activityPackage = (AIActivityPackage *) self.packageHandlerMock.packageQueue[0];
 
     //  check the Sdk version is being tested
-    XCTAssertEqual(@"ios3.3.0", activityPackage.clientSdk, @"%@", activityPackage.extendedString);
+    XCTAssertEqual(@"ios3.3.1", activityPackage.clientSdk, @"%@", activityPackage.extendedString);
 
     //   packageType should be SESSION_START
     XCTAssertEqual(@"/startup", activityPackage.path, @"%@", activityPackage.extendedString);
@@ -112,6 +112,12 @@ - (void)testFirstRun
     //   lastInterval -1, same as before
     XCTAssertNil(parameters[@"last_interval"], @"%@", activityPackage.extendedString);
 
+    //   is_iad should be false
+    XCTAssertEqual(NO, [(NSString *)parameters[@"is_iad"] boolValue], @"%@", activityPackage.extendedString);
+
+    //   vendorId of the simulator
+    XCTAssertNotNil((NSString *)parameters[@"idfv"], @"%@", activityPackage.extendedString);
+
     //  after adding, the activity handler ping the Package handler to send the package
     XCTAssert([self.loggerMock containsMessage:AILogLevelTest beginsWith:@"AIPackageHandler sendFirstPackage"],
         @"%@", self.loggerMock);
diff --git a/README.md b/README.md
index 21eeace9f..f565764d5 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ If you're using [CocoaPods][cocoapods], you can add the following line to your
 `Podfile` and continue with [step 3](#step3):
 
 ```ruby
-pod 'Adjust', :git => 'git://github.com/adjust/ios_sdk.git', :tag => 'v3.3.0'
+pod 'Adjust', :git => 'git://github.com/adjust/ios_sdk.git', :tag => 'v3.3.1'
 ```
 
 ### 1. Get the SDK
@@ -35,14 +35,14 @@ radio button to `Create groups for any added folders`.
 
 ![][add]
 
-### <a id="step3"></a>3. Add the AdSupport framework
+### <a id="step3"></a>3. Add the AdSupport and iAd framework
 
 In the Project Navigator select your project. In the left hand side of the main
 view select your target. In the tab `Build Phases` expand the group `Link
 Binary with Libraries`. On the bottom of that group click on the `+` button.
-Select the `AdSupport.framework` and click the `Add` button. In the list of
-frameworks select the newly added `AdSupport.framework` and change the
-attribute `Required` to `Optional`.
+Select the `AdSupport.framework` and click the `Add` button. Repeat the same step to
+add the `iAd.framework`. In the list of frameworks select the newly added `AdSupport.framework` 
+and `iAd.framework`. Change the attribute `Required` to `Optional`.
 
 ![][framework]
 
@@ -337,7 +337,7 @@ or add the method `openURL` and add the following call to adjust:
 [transition]: http://developer.apple.com/library/mac/#releasenotes/ObjectiveC/RN-TransitioningToARC/Introduction/Introduction.html
 [drag]: https://raw.github.com/adjust/sdks/master/Resources/ios/drag3.png
 [add]: https://raw.github.com/adjust/sdks/master/Resources/ios/add2.png
-[framework]: https://raw.github.com/adjust/sdks/master/Resources/ios/framework2.png
+[framework]: https://raw.github.com/adjust/sdks/master/Resources/ios/framework3.png
 [delegate]: https://raw.github.com/adjust/sdks/master/Resources/ios/delegate3.png
 [run]: https://raw.github.com/adjust/sdks/master/Resources/ios/run3.png
 [AEPriceMatrix]: https://github.com/adjust/AEPriceMatrix
diff --git a/VERSION b/VERSION
index 15a279981..bea438e9a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.3.0
+3.3.1
diff --git a/doc/migrate.md b/doc/migrate.md
index 7b81dd9db..6dec9a718 100644
--- a/doc/migrate.md
+++ b/doc/migrate.md
@@ -1,4 +1,4 @@
-## Migrate your adjust SDK for iOS to v3.3.0 from v3.0.0
+## Migrate your adjust SDK for iOS to v3.3.1 from v3.0.0
 
 We added an optional parameter `transactionId` to our `trackRevenue` methods. If you are tracking In-App Purchases you might want to pass in the transaction identifier provided by Apple to avoid duplicate revenue tracking. It should look roughly like this:
 
@@ -36,14 +36,14 @@ all adjust SDK calls.
 
        ![][rename]
 
-3. Download version v3.3.0 and drag the new folder `Adjust` into your Xcode
+3. Download version v3.3.1 and drag the new folder `Adjust` into your Xcode
    Project Navigator.
 
        ![][drag]
 
 4. Build your project to confirm that everything is properly connected again.
 
-The adjust SDK v3.3.0 added delegate callbacks. Check out the [README] for
+The adjust SDK v3.3.1 added delegate callbacks. Check out the [README] for
 details.
 
 
@@ -99,7 +99,7 @@ meaningful at all times! Especially if you are tracking revenue.
 1. The `appDidLaunch` method now expects your App Token instead of your App ID.
    You can find your App Token in your [dashboard].
 
-2. The adjust SDK for iOS 3.3.0 uses [ARC][arc]. If you haven't done already,
+2. The adjust SDK for iOS 3.3.1 uses [ARC][arc]. If you haven't done already,
    we recommend [transitioning your project to use ARC][transition] as well. If
    you don't want to use ARC, you have to enable ARC for all files of the
    adjust SDK. Please consult the [README] for details.