I just published a new, free, app both on Google Play and Amazon Marketplace.
It’s free (and on Amazon probably will yield some “coins” as soon as I can get it cleared for the Developer’s Select program).
With my app, you can generate pretty secure passwords from any phrase you choose (at least 2 words).
It’s available at https://play.google.com/store/apps/details?id=com.cava.contrapass
Hope it’s useful! I welcome any and all kinds of feedback to improve it.