If you’re having trouble opening Cydia, it may be because you don’t have it installed on your device. If you do, follow these steps to delete Cydia from your device:

  1. Open the Settings app and navigate to the General section.
  2. Scroll down and tap on the Security button.
  3. Tap on the Remove Cydia button.
  4. Type in your password when prompted and press OK to confirm deletion.