How to detect that the app is running on a jailbroken device? [duplicate]

You can detect through code that if the app is running on a jail broken device or not. Through that way you can pop up an alert and close the app. You can do whatever you want to do. Here is a tutorial for it:

http://thwart-ipa-cracks.blogspot.com/2008/11/detection.html

and here is a Stack Overflow post:

How do I detect that an iOS app is running on a jailbroken phone?

Also, if you want a complete solution, you can see in tapjoy sdk code. They are detecting jailbroken iPhone. Here is tapjoy URL https://www.tapjoy.com/

Check for these paths

+ (BOOL)isJailBroken {#ifdef TARGET_IPHONE_SIMULATOR    return NO;#endif    NSArray *paths = @[@"/bin/bash",                       @"/usr/sbin/sshd",                       @"/etc/apt",                       @"/private/var/lib/apt/",                       @"/Applications/Cydia.app",                       ];    for (NSString *path in paths) {        if ([self fileExistsAtPath:path]) {            return YES;        }    }    return NO;}+ (BOOL)fileExistsAtPath:(NSString *)path {    FILE *pFile;    pFile = fopen([path cStringUsingEncoding:[NSString defaultCStringEncoding]], "r");    if (pFile == NULL) {        return NO;    }    else        fclose(pFile);    return YES;}

Additionally, you can take a look https://github.com/OneSignal/OneSignal-iOS-SDK/blob/master/iOS_SDK/OneSignalSDK/Source/OneSignalJailbreakDetection.m

Try to find a file which cydia or jailbroken device create. Or try to write in a file outside the app's blackbox. If you succeed to do that, the device is compromised/jailbroken :)

- (BOOL)jailbroken{    NSFileManager * fileManager = [NSFileManager defaultManager];    return [fileManager fileExistsAtPath:@"/private/var/lib/apt/"];}