How should a Flutter app properly detect whether it is currently running on a rooted Android device or a jailbroken iOS device, and what genuine security risks does running on such a compromised device actually introduce?

A rooted Android device or a jailbroken iOS device has effectively had its normal, standard operating system level security restrictions deliberately removed or bypassed by its owner, which means a malicious app running on that exact same compromised device could potentially gain unauthorized access to another app's own private data or actively tamper with that other app's genuine runtime behavior in ways that would simply not otherwise be possible on a properly secured, unmodified device, and specialized detection packages can help a genuinely security sensitive app, such as one handling real financial transactions, detect this specific compromised state and appropriately respond, such as by restricting certain particularly sensitive features or clearly warning the user about the increased inherent risk.

final isJailbroken = await FlutterJailbreakDetection.jailbroken;
if (isJailbroken) {
  showSecurityWarning();
}