I'm currently using CDP Math! 😀
Even though it's little pricey, I think it's worth getting them. 🙂
It has 10 practice tests, and after you take each test, it gives you the breakdown. (i.e. how many you got right/wrong for each subcategories...like algebra, geometry, probability, trig, etc...)
But if you dont feel like spending too much money, I would suggest you to do the Quantitative reasoning section in Destroyer.