How to Protect Apps Against Checkra1n Jailbreak iOS Tool

Last updated May 18, 2021 by Alan Bavosa


Learn 3 easy steps to Protect iOS Apps against Checkra1n and other tools for Jailbreaking iOS.

What is Checkra1n?

Checkra1n is a semi-tethered jailbreak tool, which currently supports jailbreak of IOS versions 12.0 – 14.4.1. Checkra1n was developed primarily by Luca Todesco (qwertyoruiop) . Checkra1n is based on the checkm8 bootrom exploit released by axi0mX. Checkra1n is different than almost any other previous jailbreak method because it exploits a firmware bug, and thus cannot be patched by Apple with a software release.

Checkra1n is deployed from a Mac or Linux computer attached to the iDevice via USB cable (Windows computers may be supported in the future). Currently supports jailbreak of IOS versions 12.0 – 14.4.1. However not every supported IOS also supports all the iDevices. Also there are differences in supported iDevices between Mac and Linux versions.
Current version: 0.12.2
Web site:

Here are the Top 3 reasons people use Checkra1n to Jailbreak iOS

  1. To bypass Apple’s restrictions and install software Apple doesn’t support or sanction.
  2. To change the behavior, skin, or look and feel of iOS in ways that Apple does not support
  3. Gamers or hackers Jailbreak iOS to access alternative app stores like Cydia or Sileo. These repositories allow for the installation of game mods, tweaks, cheat tools, and more advanced hacking tools.

What is iOS Jailbreaking?

Jailbreaking is the process of unlocking the iOS operating system on an Apple mobile device. Jailbreaking is a form of administrative privilege escalation, which bypasses Apple’s restrictions, resulting in full administrative control over the OS (the highest level of administrative privilege possible).  Jailbreaking is often accomplished by exploiting bugs in Apple’s software/firmware or modifying system kernels to allow read and write access to the file system. Jailbreaking is one of the primary methods/tools for every hacker – both black hat hackers and white hat hackers (eg: penetration testers or security researchers). They all use Jailbreaking in similar ways (to compromise the security model of mobile devices, the operating system, and any app running on the device). The main difference is that black hat hackers have malicious intent, while white-hat hackers generally have non-malicious intent.

Keep reading to learn how to use Appdome Jailbreak Prevention to protect any iOS app against Checkra1n and many other Jailbreaking tools.

How to Protect iOS Apps against Checkra1n

Appdome Jailbreak Prevention enables an iOS app to protect itself against Jailbreaking and Jailbreaking tools like Checkra1n. You can use Appdome to build Jailbreak Prevention into any iOS app – without coding. When the Appdome-secured app detects that it’s running on a Jailbroken device the app will shut itself down (default behavior) after displaying a message to the mobile user. This protects that app, user, and mobile data from being compromised or attacked by a malicious actor using Jailbreaking.

3 Easy Steps to Protect iOS apps against Checkra1n 

Please follow these 3 easy steps to add Jailbreak Prevention to any iOS app and prevent hackers from using tools like Checkra1n to weaken the app’s security model. 

  1. Upload an iOS App to Appdome’s no code security platform (.ipa)
  2. In the Build Tab, under Security, Select Jailbreak Prevention (shown below)
  3. Click Build My App

No code jailbreak prevention ios apps

Congratulations! The app can now defend itself against Checkra1n.

Appdome’s no-code mobile app security platform offers mobile developers, DevSec and security professionals a convenient and reliable way to protect Android and iOS apps with RASP (Runtime Application Self-Protection), such as Jailbreak Prevention. When an Appdome user clicks “Build My App,” Appdome leverages a microservice architecture filled with 1000s of security plugins, and an adaptive code generation engine that matches the correct required plugins to the development environment, frameworks, and methods in each app.


Here’s what you need to build secured apps with

No Coding Dependency

Using Appdome, there are no development or coding prerequisites to build secured apps with Jailbreak prevention and prevent Checkra1n. There is no SDK and no library to manually code or implement in the app. The Appdome technology adds the relevant standards, frameworks, and logic to the app automatically, with no manual development work at all.

How to Sign & Publish Secured Mobile Apps Built on Appdome  

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

Or, see this quick reference Releasing Secured Android & iOS Apps built on Appdome. 

 How to Learn More

Check out the following related KB articles:

Jailbreaking Prevention

Rooting Android 

Prevent Jailbreak Bypass and Jailbreak Hiding 

Check out the full menu of features in the Appdome Mobile Security Suite

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

Or request a demo at any time.

Thank you!

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. If you don’t already have an account, you can sign up for free.




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