Possible use cases could be that you could use it with most if not all of the trivia apps out there in the market.
It works by analyzing the content shown in the screen by performing optical character recognition. So it works very reliably across variety of screen contents.
For each app you want to target, create a profile for them and use it in subsequent games.
Depending on the type of app you are targeting, while creating profile, if possible always specify question and option area separately to reduce chance of mistakes.
It uses 2 search engines to make searches. You can change that in Settings.
Settings screen is for advanced users who want more accuracy at the cost of most probably being blocked by search engine after few searches. However, it fallbacks to fallback search engine in that case. So not much to worry.
It makes 2 searches per click
1. Searches with question only (More trustworthy)
2. Searches with everything it can see(question and all 3 options) (Trustworthy but not as much as 1)
In those 2 searches, the app tries to find the occurrence of option words in the search result and tries to guess the answer.
Having said that, do not install this app if you are under impression to get 100% correct answers. The accuracy so far I have found is above 70%. Don't blindly trust the app. If you know the answer, then you are most probably correct. Use it's suggestion only in case you have no clue what the answer is.