> For the complete documentation index, see [llms.txt](https://docs.talsec.app/freerasp/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.talsec.app/freerasp/freerasp/wiki/threat-detection/emulator-detection.md).

# Emulator detection

Running an application inside an emulator/simulator allows an attacker to hook or trace program execution. For applications running inside an emulator, it is easy to inspect the system's state, reset it to a saved image, or monitor how the app operates. Keep in mind that not every emulator/simulator usage means an ongoing potential threat for the application.

Below are code snippets demonstrating emulator detection across various platforms:

```dart
// Android emulator check
override fun onSimulator() {
    TODO("Not yet implemented")
}

// iOS simulator detection
case simulator

// Flutter emulator and simulator detection
onSimulator: () => print("Simulator")

// Cordova emulator and simulator detection
simulator: () => {
    // Place your reaction here
}

// React Native emulator and simulator detection
simulator: () => {
    // Place your reaction here
}

// Capacitor emulator and simulator detection
simulator: () => {
    // Place your reaction here
}
```

{% hint style="info" %}
**Recommended action:** Notify users that their device is insecure and log the event on your BE. Some of the applications (mostly banking) are often even killed upon the detection of this threat.
{% endhint %}


---

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