How to Block App Player Emulators in iOS Apps

Last updated January 31, 2024 by Appdome

Learn to Block App Players in iOS apps, in mobile CI/CD with a Data-Driven DevSecOps™ build system.

What are App Players?

App Players, a type of emulator, are specifically designed to enable the use of apps from inside virtualized environments that run on laptops or powerful computers, instead of using the app on the mobile device as originally intended. Emulators participate in dynamic analysis. This is a form of reverse engineering that simulates, models, and mimics the behavior of mobile application software and hardware. It includes how apps interact with the mobile operating system and other systems, and it’s useful for creating mods. In most cases, individual reverse engineers, hackers, or gamers conduct these actions solely for their benefit, not in the interest of the publishers, developers, or legitimate mobile application users.

Why Block App Players in iOS Apps ?

App Players are used for cheating, to give a gamer an unfair advantage over another gamer using a mobile device. App Players create an operating environment that looks and functions much like the mobile device model, with many of the capabilities of an actual iOS device. But the gamer can use a full-size keyboard, mouse, controller, or joystick to give themselves an unfair advantage over other legitimate iOS phone users. Another reason app developers may want to prevent App Players within iOS is to protect the copyright of the art and graphics used in the mobile app.

Prerequisites for Using Block App Players:

To use Appdome’s mobile app security build system to Block App Players , you’ll need:

Block App Players on iOS apps using Appdome

On Appdome, follow these 3 simple steps to create self-defending iOS Apps that Block App Players without an SDK or gateway:

  1. Upload the Mobile App to Appdome.

    1. Upload an app to Appdome’s Mobile App Security Build System

    2. Upload Method: Appdome Console or DEV-API
    3. iOS Formats: .ipa
    4. Block App Players Compatible With: Obj-C, C+, Java, Swift, Flutter, React Native, Unity, Xamarin, Cordova and more
  2. Build the feature: Block App Players.

    1. Building Block App Players by using Appdome’s DEV-API:

      1. Create and name the Fusion Set (security template) that will contain the Block App Players feature as shown below:
      2. fusion set that contains Block App Players

        Figure 1: Fusion Set that will contain the Block App Players feature
        Note: Naming the Fusion Set to correspond to the protection(s) selected is for illustration purposes only (not required).

      3. Follow the steps in Sections 2.2.1-2.2.2 of this article, Building the Block App Players feature via Appdome Console, to add the Block App Players feature to this Fusion Set.

      4. Open the Fusion Set Detail Summary by clicking the “...” symbol on the far-right corner of the Fusion Set, as shown in Figure 1 above, and get the Fusion Set ID from the Fusion Set Detail Summary (as shown below): fusion Set Detail Summary image

        Figure 2: Fusion Set Detail Summary
        Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).

      5. Follow the instructions below to use the Fusion Set ID inside any standard mobile DevOps or CI/CD toolkit like Bitrise, App Center, Jenkins, Travis, Team City, Cirlce CI or other system:
        1. Build an API for the app – for instructions, see the tasks under Appdome API Reference Guide
        2. Look for sample APIs in Appdome’s GitHub Repository
    2. Building the Block App Players feature via Appdome Console

      To build the Block App Players protection by using Appdome Console, follow the instructions below.

      1. Where: Inside the Appdome Console, go to Build > Anti Fraud Tab > Mobile Cheat Prevention section.
      2. When you select the Block App Players you'll notice that your Fusion Set you created in step 2.1.1 now bears the icon of the protection category that contains Block App Players

        Fusion Set applied Block App Players

        Figure 4: Fusion Set that displays the newly added Block App Players protection

      3. Select the Threat-Event™ in-app mobile Threat Defense and Intelligence policy for Block App Players:
        1. Threat-Events™ OFF > In-App Defense

          If the Threat-Events™ setting is cleared (not selected). Appdome will detect and defend the user and app by enforcing Block App Players.

        2. Threat-Events™ ON > In-App Detection

          When this setting is used, Appdome detects the presence of App Players and passes Appdome’s Threat-Event™ attack intelligence to the app’s business logic for processing, enforcement, and user notification. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for Block App Players Intelligence and Control in Mobile Apps.

        3. Threat-Events™ ON > In-App Defense

          When this setting is used, Appdome detects and defends against App Players (same as Appdome Enforce) and passes Appdome’s Threat-Event™ attack intelligence the app’s business logic for processing. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for Block App Players Intelligence and Control in Mobile Apps.

      4. Click Build My App at the bottom of the Build Workflow (shown in Figure 3).
    Congratulations!  The Block App Players protection is now added to the mobile app
  3. Certify the Block App Players feature in iOS Apps.

    After building Block App Players, Appdome generates a Certified Secure™ certificate to guarantee that the Block App Players protection has been added and is protecting the app. To verify that the Block App Players protection has been added to the mobile app, locate the protection in the Certified Secure™ certificate as shown below: Block App Players shown in Certificate secure

    Figure 5: Certified Secure™ certificate

    Each Certified Secure™ certificate provides DevOps and DevSecOps organizations the entire workflow summary, audit trail of each build, and proof of protection that Block App Players has been added to each iOS app. Certified Secure provides instant and in-line DevSecOps compliance certification that Block App Players and other mobile app security features are in each build of the mobile app

Using Threat-Events™ for App Players Intelligence and Control in iOS Apps

Appdome Threat-Events™ provides consumable in-app mobile app attack intelligence and defense control when App Players is detected. To consume and use Threat-Events™ for App Players in iOS Apps, use AddObserverForName in Notification Center, and the code samples for Threat-Events™ for App Players shown below.

The specifications and options for Threat-Events™ for App Players are:

Threat-Event™ Elements Block App Players Method Detail
Appdome Feature Name Block App Players
Threat-Event Mode
OFF, IN-APP DEFENSE Appdome detects, defends and notifies user (standard OS dialog) using customizable messaging.
ON, IN-APP DETECTION Appdome detects the attack or threat and passes the event in a standard format to the app for processing (app chooses how and when to enforce).
ON, IN-APP DEFENSE Uses Appdome Enforce mode for any attack or threat and passes the event in a standard format to the app for processing (gather intel on attacks and threats without losing any protection).
Certified Secure™ Threat Event Check
Visible in ThreatScope™
Developer Parameters for Blocking App Players Threat-Event™
Threat-Event NAME AppPlayerDetected
Threat-Event DATA reasonData
Threat-Event CODE reasonCode
Threat-Event REF 6801
Threat-Event SCORE
currentThreatEventScore Current Threat-Event score
threatEventsScore Total Threat-events score
Threat-Event Context Keys
message Message displayed for the user on event
externalID The external ID of the event which can be listened via Threat Events
osVersion OS version of the current device
deviceModel Current device model
deviceManufacturer The manufacturer of the current device
fusedAppToken The task ID of the Appdome fusion of the currently running app
kernelInfo Info about the kernel: system name, node name, release, version and machine.
carrierPlmn PLMN of the device
deviceID Current device ID
reasonCode Reason code of the occured event
buildDate Appdome fusion date of the current application
devicePlatform OS name of the current device
carrierName Carrier name of the current device
updatedOSVersion Is the OS version up to date
timeZone Time zone
deviceFaceDown Is the device face down
locationLong Location long
locationLat Location lat
locationState Location state
wifiSsid Wifi SSID
wifiSsidPermissionStatus Wifi SSID permission status

With Threat-Events™ enabled (turned ON), iOS developers can get detailed attack intelligence and granular defense control in iOS applications and create amazing user experiences for all mobile end users when App Players is detected.

The following is a code sample for native iOS apps, which uses all values in the specification above for Block App Players:


Using Appdome, there are no development or coding prerequisites to build secured iOS Apps by using Block App Players. There is no SDK and no library to code or implement in the app and no gateway to deploy in your network. All protections are built into each app and the resulting app is self-defending and self-protecting.

Releasing and Publishing Mobile Apps with Block App Players

After successfully securing your app by using Appdome, there are several available options to complete your project, depending on your app lifecycle or workflow. These include:

Related Articles:

If you have any questions, please send them our way at support.appdome.com or via the chat window on the Appdome platform.

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Thanks for visiting Appdome! Our mission is to secure every app on the planet by making mobile app security easy. We hope we’re living up to the mission with your project.

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