A free program for Android, by Olaf Titz.
Home Network SSL Checker for Android provides a simple and reliable way to check the validity of SSL certificates and find potential issues. If an SSL-protected web page cannot be reached, the app will present a warning and provide the URL and a detailed explanation. The app will work on any device with Android 4.1 or above.
If you want to check the validity of your SSL certificates for the websites in your Android device, Home Network SSL Checker is the app you should use.
How to use the app
Home Network SSL Checker can be used in several ways. You can check the validity of your SSL certificates for the websites in your Android device by simply opening the app and pressing the "Check web pages" button. You can also configure the app to check a given URL for a specific site.