Not much experience in those, but you could try to locate the app's files with some... apps. Like these if you're using iPhone:
<a href='https://support.apple.com/en-us/HT206481'>https://support.apple.com/en-us/HT206481</a>
<a href='https://www.tigisoftware.com/default/?page_id=78'>https://www.tigisoftware.com/default/?page_id=78</a>
If the app stores passwords in some way, the file or files containing passwords are probably encrypted. So if you find a file like "passwords.txt" then the contents aren't readable, but the file might reveal something about the encryption or the password itself.
Not much experience in those, but you could try to locate the app's files with some... apps. Like these if you're using iPhone:
<a href='https://support.apple.com/en-us/HT206481'>https://support.apple.com/en-us/HT206481</a>
<a href='https://www.tigisoftware.com/default/?page_id=78'>https://www.tigisoftware.com/default/?page_id=78</a>
If the app stores passwords in some way, the file or files containing passwords are probably encrypted. So if you find a file like "passwords.txt" then the contents aren't readable, but the file might reveal something about the encryption or the password itself.