MathTango by Originator is a free educational app for Android that teaches kids aged 5-10 the basics of addition, subtraction, multiplication, and division in an enjoyable and intuitive way. The app combines math puzzles with classic world-building activities to create a fun and engaging learning experience for kids.

MathTango offers over 500 puzzles that cover more than 40 math levels, with additional review levels for lesson reinforcement and advanced play. The app generates a customized, age-appropriate curriculum for every user through its lesson plan wizard, which adapts dynamically based on the child's learning progress.

The addition and subtraction lessons include 9 unique puzzle game types, such as counting forwards and backwards, number patterns, and adding single and double-digit numbers. Meanwhile, the multiplication and division lessons include 7 different puzzle game types that cover various multiplication and division factors.

MathTango is structured around two worlds, Island and Starbase, and offers never-ending missions that allow kids to earn unique characters and in-game items to customize their worlds. The app also offers a 7-day free trial, multiple user profiles, and is 100% free of advertisements and offers.

Overall, MathTango is a well-designed app that helps kids learn math in a fun and interactive way.