Mathris - A Math Game is described as follows:
Do Sums. Have Fun.The free version of Mathris - A Math Game is rated at 3.8 stars in Google Play. It is rated at 2.3 stars in the Amazon Appstore.
Mathris - A Math Game is a Tetris-style game for kids to learn numbers and build their basic math skills while still having a blast. Players must scramble to solve arithmetic problems while correctly stacking the blocks.
The numbers fall like Tetris bricks, but you can only remove the bricks by matching a question and an answer (4+2 with 6), a question with a question that has the same result (4+2 with 3+3), or two of the same numbers (5 with 5).
Math Tetris features three game modes (addition, subtraction, and multiplication) and four themes (winter, spring, summer, and autumn).
Mathris features high scores, and is integrated with OpenFeint so you can compete with players around the world. Toggle sound effects and background music. Mathris also comes with a tutorial and option to customize the number space (1 to 10, 1 to 20, and 1 to 50). Just how fast are your arithmetic skills?
There are only 17 reviews in the Amazon Appstore, which means that negative reviews skew the overall rating mightily but most of the negatives were about bugs and poor performance.
what it means to developers.
Amazon.com opened up the Appstore despite a lawsuit by Apple, which has previously trademarked the term "App Store." Microsoft has filed an appeal against that trademark, saying the term is too generic. Amazon.com has responded to the lawsuit in the same manner.