Multiplication Master 99, developed by Sugar Soy Sauce, is a free Android app that helps users learn multiplication from 1x1 up to 99x99. The app offers three different modes: Tables, Exercise, and Examination, to suit the user's learning style.

In Tables mode, users can view all multiplication tables to help with memorization. Exercise mode allows users to hide the answer, the multiplier, or multiplicand to improve memory. Test mode offers the user the option to choose the number of questions from 10 up to 50 questions, allowing for more practice.

This app is not only for kids but also for adults who want to exercise their brain. Multiplication Master 99 is a useful tool for anyone who wants to improve their math skills.