1ケタけいさん - 1ケタ暗算マスター！同い年とスコアバトル

[Improve your child's calculation skills while having fun! Compete against same-age rivals with the math app "Single-Digit Calculations"]

"My child quickly gets bored with math drills..."
"I want my child to study math more independently..."
"My child struggles with memorizing multiplication tables and carrying over and over..."
"Single-Digit Calculations" was created to solve these problems for parents!

Single-digit calculations are the foundation of all arithmetic and mathematics. Being able to solve these problems quickly and accurately is the key to overcoming future fears about math.
This educational and learning app is designed to engage children in repetitive practice, which can be difficult to sustain with paper drills, in a game-like, engaging way.

[3 Reasons to Choose Single-Digit Calculations]

① The "graph function" lets you see their progress at a glance, boosting motivation!
Daily play records and scores are automatically saved and displayed in easy-to-read graphs.
By comparing their progress with their past selves, children can experience a real sense of accomplishment and self-affirmation, saying things like, "Yesterday I only got this far, but today my score improved!" or "I can solve so many more problems now!" Today's score and best score are always displayed on the home screen, making daily goals clear and encouraging self-motivated learning.

② Battle Rivals Nationwide! Age Ranking Feature
Don't just beat your personal best. By registering your birthday (age), you can compete against players from around the country.
The greatest appeal of this app is the "age filtering feature (years old to year old)"!
Seeing rankings for only the same age, such as "7 to 7 years old," will ignite your child's competitive spirit, making them think, "There's a kid my age getting such an amazing score! I can't lose!"
Of course, you can also view the overall ranking for "All Ages." Continue challenging yourself a little each day with the goal of becoming the nation's number one "Calculation Master"!

③ A safe design for children to play alone and a premium plan
Our app is packed with features to help children enjoy the stress-free pace of calculation, including a simple, intuitive interface, easy-to-read text (using the M PLUS Rounded 1c font), and a lively sound when a correct answer is reached.

What's more, to prevent accidental taps on ads that take children to another site and disrupt their concentration, we offer a "Premium Plan (one-time purchase)" that completely hides in-app ads. A single purchase permanently removes ads, providing an extremely safe and comfortable learning environment where children can fully immerse themselves in calculations (purchases can also be restored when changing devices).

[Four calculation modes cover everything from basic to advanced]

Children can try their favorite calculations as many times as they like, tailored to their learning pace and grade level.

◆ Addition
The first step in math! This app trains children to quickly solve single-digit + single-digit calculations. Practice repeatedly until the answer pops into their head without using your fingers. This is an important mode that lays the foundation for carrying.

◆ Subtraction
Subtraction is the next hurdle after addition. Smoothly mastering it will greatly increase your confidence in math. It's perfect for speeding up mental arithmetic.

◆ Multiplication
This mode is specialized for mastering the multiplication tables, the most hurdle for second graders. Rather than just memorizing them in order, you can instantly answer randomly generated multiplication questions to fully master them.

◆ Division
This division mode trains students to think in the opposite direction to multiplication. It can also be used as a test to check whether they have a solid grasp of the basics of multiplication. Once you've mastered this, you'll be perfect at single-digit calculations!

[Recommended for the following children, families, and adults!]

▼ For toddlers and preschoolers (younger, middle, and older)
As an advanced learning tool for children entering elementary school. Children who are beginning to develop an interest in numbers can naturally engage with calculations as if they were playing a game.

▼ For elementary school children (lower, middle, and upper grades)

Perfect for warming up before daily homework or as a way to refresh children who struggle with paper worksheets. Encouraging them to "Let's do just five more minutes of math with the app!" will help foster a study habit.

▼ For parents and grandparents too

In fact, quickly performing single-digit mental arithmetic in succession is an extremely effective form of "brain training" (brain activation) for adults as well.

Set the ranking to "All Years" and show off your serious score to your children. The goal of "beating Dad's score!" is often the greatest motivation for children. It can also be used as a new communication tool, allowing the whole family to compete for scores.

[Frequently Asked Questions (FAQ)]

Q. Does the app cost anything?
A. Basic play is completely free. Ranking participation and graph features are all free. A "Premium Plan" that hides ads is available for a fee upon request.

Q. Why do I need to register my date of birth?
A. This is used to consistently calculate and display accurate ages (in years old) in the "Same Age Ranking" feature, which is the app's main feature. Please rest assured that the entered date of birth is used only within the app's system and will never be disclosed or shared with third parties for personal identification.

Q. Can I change my nickname or birthday later?
A. Yes, you can easily change or modify them at any time by going to "Profile Settings" on the settings screen.

[Message from the Developer]
Thank you for reading to the end.
We developed this app with the desire to help children learn math in a fun way.
The more you practice calculations, the faster and more accurate they will become. We encourage parents and children to experience the joy of watching the graph grow ever-increasing and the excitement of gradually climbing the rankings.

Just a few minutes of play each day will transform your child's math skills and confidence in the months and years to come.
Rivals from all over the country are waiting for your challenge!
Download now and aim to become the number one "Calculation Master"!