This app was mentioned in 4 comments, with an average of 2.25 upvotes
If your comprehension is that low, reading it with a translation alongside is probably the best course of action. Most of the benefits of using a dictionary for a fraction of the time and effort. You can use two physical books (book stands help with this), a parallel text, you can read it in your L1 first, you can make your own parallel text on the computer, or you can use this great app that turns your epubs into a parallel text for you.
The first time through I wouldn't write anything down. If you want to go back through and write down the words that come up frequently that you're still not sure about, that can help. 100% comprehension of most any book won't happen until you're well advanced enough to know how you like to read, so don't try to learn every word in the book. Not for now, at least.
Do you have screenshots? This page is missing them
https://play.google.com/store/apps/details?id=com.book2.book2&ah=QkSrzOzbm-2rE27piA7OZIRqnlQ
Bible is translated verse by verse so I am looking for something that can take an advantage of it. Like that: http://verseview.info/verseview/wp-content/uploads/2012/01/Screenshot_2015-06-16-22-43-56.png
I ting the easiest way would be to ask WordProject to add Polish version to the mobile variant. They have the text.
hope this helps https://play.google.com/store/apps/details?id=com.book2.book2
follow https://www.reddit.com/r/de, watch German movie or listen to radio, read German book or read it in parallel with English book https://play.google.com/store/apps/details?id=com.book2.book2