Who is the best app for math?

I'm curious to know, when it comes to math apps, which one stands out as the ultimate solution? With so many options available, it can be overwhelming to choose the right one. Is there a particular app that has garnered rave reviews for its user-friendliness, comprehensiveness, and effectiveness in helping users master math concepts? I'm looking for an app that not only covers the basics but also delves into more advanced topics, making it suitable for students of all levels. Additionally, how does it compare to its competitors in terms of features, such as personalized learning plans, interactive lessons, and practice exercises? Ultimately, I'm seeking the app that's considered the best in the math app market.