According to OWASP, we have a list of top ten mobile application vulnerabilities.
But we are damn sure that the number of vulnerabilities on mobile apps, especially android apps are far more than listed here. And also I couldn't find a comprehensive checklist for either android or iOS penetration testing anywhere in the internet. If anyone have such a list with mobile application vulnerabilities and their testing methodologies please share here. Anything like a link to any such sources are also entertained.