Librivox has the entire Douay Rheims, but it is in hour-long segments.
You can either download it to a downloads app that plays MP3s (I think one can d/l the zip file and have it unzip automatically; that’s worth trying.). Or one can get for free the Librivox app. The one I like best is called Librivox and has a purplish-pink background wjth a weird multi-colored open book with an icon of headphones on it.
You can listen to the book over wifi, or download it in its entirety at the top, or download segments at a time. This should be easy to see how to do when you look at it.
The one thing to do is to hit Save when you find what you are looking for–that will save it to your favorites and does not download it. (I do not know if they fixed the glitch which allowed you to d/l the book without putting into your favorites and then not allow you to put it in your favorites after the download, requiring wifi to access the entry into the downloaded book.)
They also have quite a few good Catholic books

including GK Chesterton!!! and Light and Peace by Fr Quadrupani, and Robert Hughs Benson…
There are lots of other good Catholic audio sources when you need more