This app was mentioned in 3 comments, with an average of 2.33 upvotes
Sporty's Study Buddy hands down. I have it installed, so I can't see the price, but I think it's something like 7-10 bucks. I saw questions on from the app on the new ACS written verbatim. If you're so inclined, get the Sporty's online Learn to Fly course. That helped me a lot, and they have a ton of questions that make up an infinite amount of practice tests you can take. Good luck!
oh no no, there's an app for only like $10 that just as a list of all the questions
Let me find it for you real quick
Edit:
I used exams4pilots.org until I found Sporty's free desktop version.
I used the free version (PPL only) on my desktop and used the $10 Android app (Play Store link) on my phone and tablet.
Memorize the cross-country and weight-and-balance questions and learn the rest. The book of figures I got during my actual test had sectional maps that were not to scale. Having the answers memorized made that part much easier.