たすひくバトルDX is an educational game developed by box-i.net and is available for free on Android. The game is designed to teach kids and adults basic math skills through an exciting monster-battling adventure. The gameplay involves solving addition and subtraction problems to defeat monsters. It is suitable for beginners, learners, and those who want to review their math skills.

The game features 220 monsters, including rare ones, that can be collected as cards when defeated. It has different stages that players can unlock as they level up. The game also has a ranking system that records players' calculation time and experience points. This feature motivates players to aim for the top of the leaderboard.

たすひくバトルDX is perfect for parents and children who want to have fun while improving their math skills. It is also great for adults who want to challenge themselves and practice their mental math. Overall, it is an enjoyable and engaging way to learn and practice basic math skills.