1.https://github.com/BishopFox/bfdecrypt

Utility to decrypt App Store apps on jailbroken iOS 11.x

2.https://github.com/ivRodriguezCA/decrypt-ios-apps-script

Python script to SSH into your jailbroken device, decrypt an iOS App and transfer it to your local machine
This will decrypt the Instagram app and transfer it from your device to your ~/Desktop:

python ios_ssh.py –lport 2222 -p s3cr37 –app “Instagram”
This will give you an interactive shell to communicate with your device over USB:

python ios_ssh.py –lport 2222 -p s3cr37 -i

The missing guide to debug third party apps on iOS 12
如何调试第三方APP：https://medium.com/@felipejfc/the-ultimate-guide-for-live-debugging-apps-on-jailbroken-ios-12-4c5b48adf2fb

frida的cycript：https://github.com/nowsecure/frida-cycript