How to Troubleshoot App Signing in Secured Android & iOS Apps

Last updated January 11, 2024 by Appdome

Signing mobile apps is complex and prone to error. Appdome provides tools to validate app signing when users sign mobile apps locally or privately on their own systems. This Knowledge Base article offers step-by-step instructions for using Appdome to troubleshoot app signing in secured Android and iOS mobile apps.

We hope you find this knowledge base useful and enjoy using Appdome!

Using Appdome to Troubleshoot App Signing in Secured Android & iOS Apps

Appdome is a mobile security platform that allows users to add a wide variety of features, SDKs, and APIs to Android and iOS apps. Using a simple ‘click to add’ user interface, Appdome allows anyone to easily add additional functionality to any mobile app – instantly, with no code or coding required.

In order to deploy a secured app, it must be signed. Users have the flexibility of signing fused applications inside or outside of Appdome. We highly recommend using the built-in app signing functionality in Appdome. Appdome uses multiple input validation mechanisms to ensure the proper signing of each mobile app. Deploying an Appdome-Fused app is only possible if it has been properly signed.

If you choose to sign an Appdome-Fused app outside of Appdome, Appdome offers an App Validation service to troubleshoot app signing in secured Android & iOS apps. The service also verifies that the app wasn’t tampered with in any way that may prevent it from running on any mobile device.

Prerequisites for using Appdome’s App Validation

In order to use Appdome’s app validation, you’ll need:

  • Appdome account – IDEAL or higher.
  • Signed mobile app (.ipa for iOS, or .apk or .aab for Android)

Easy Steps to Troubleshoot App Signing in Secured Android & iOS Apps

Follow these step-by-step instructions to troubleshoot app signing in secured Android & iOS apps:

  1. Login to your Appdome account
  2. Click on your username in the top-right corner of the screen
  3. Select App Validation.



4. Upload your signed mobile app by dragging the app file to the dropbox or by browsing your device for the app file.
Note! You cannot validate an app unless you are authorized to change its functionality

Adding Your App 2

5. Once your app has fully loaded, Appdome’s app validation process will start automatically.

Validation In Progres 3

When the app validation process is complete, Appdome will present the results of the validated app signing at the bottom of the screen.

Here Are a Few Examples of App Validation Results:

  • Correctly signed app:


  • Falsely signed iOS app (private signing):

Private Sigining Ios [ Failed ]

  • Android app signed with incorrect keystore (private signing):

Private Sign [failed] Android

How Do I Correctly Sign My App?

Signing an iOS app and Signing an Android app is easy using Appdome. Alternatively, you can use Private Signing, which requires downloading your unsigned app and signing it locally using your own signing methods.

Make sure to sign correctly, as an incorrect signature can trigger Appdome’s Anti-Tampering protection.

How to Validate the Signing SHA-1 or SHA-256 of a Google Play App

In some cases, Google Play resigns the application. In these cases, the SHA1 or the SHA-256 can be extracted via the Google Play Console. Or Via extracting the downloaded apk from an Android phone and uploading it to the verification tool as depicted above.

How Do I Learn More?

Check out Appdome’s platform or request a demo at any time.

If you have any questions, please send them our way at 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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