1x1. Lite vs Sugoku

1x1 helps to teach children how to multiply the numbers from 1 to 10. The app doesn't use any words, so it can be used by children in any language. The app has been tested by teachers — you will find the references inside the app, under "references". This version shows the multiplication sign as a dot: 3 · 4. There is also a version with a cross (3 × 4), called "1x1..". This is the Lite version: the first three games of every level are free. If you like the app, one single in-app purchase unlocks all nine games — a one-time purchase, and it works with Family Sharing. The app has eight levels, from BEGINNER to INSANE. Each level has nine games, its own tasks and its own trophy — 72 games and eight trophies in all. By the end of the level HARD, all 100 multiplication tasks from 1×1 to 10×10 have been practiced; CHAMPION and INSANE are an extra challenge on top. Our apps are based on a modification of the Leitner system: https://en.wikipedia.org/wiki/Flashcard This means that a task comes back until the child answers it correctly. The app also remembers every task the child has ever got wrong and brings it back later. This is how the answers stay in the child's memory, so real learning happens. Under the equation the answer is also shown as a picture: in a field of a hundred dots, as many light up as the result of the task. A child who does not know the answer yet can count them. If the child answers all the tasks of a game correctly, the game is finished, and the next game opens only when the score is high enough. Every game can earn up to three stars. To earn the third star, the child has to play the game again, this time without the help of the dots. • Eight levels with nine games each, and a trophy for every level • Every player has their own name, their own scores and their own settings • Two settings per child: how many different tasks one game holds (easy, medium or hard), and how often a task comes back • A row of diamonds shows how many tasks the game holds • The scores can be reset, so that a child can repeat the lessons later, or another child can do the exercises • No advertising from third parties • No account and no registration • Links out of the app only behind a parental gate Please note that our apps are real educational apps, made, among others, for the classroom and for homework. In our apps the education is more important than fun. Our apps are more like doing homework than playing a game, so finishing them can be some work for a child. It might be helpful if the parents or teachers support the child's motivation. The reward for the work is that the child will master all multiplication tasks up to 10×10 without any problems. We would very much appreciate any feedback from you: info@creasoft.app Recommended for ages 8 and up

Sugoku is a drill app for high school mathematics, shown the way it looks in a printed textbook: fractions stacked with a horizontal bar, √ with a vinculum, raised exponents, and ∫, Σ, lim rendered properly. Problems are generated on the fly, so you never run out of practice. WHAT YOU CAN PRACTICE - 235 topics covering the full Japanese high school curriculum (Math I, A, II, B, C, III): algebra and proof, quadratic functions, sets and logic, trigonometry, exponentials and logarithms, analytic geometry, differentiation and integration, sequences, statistical inference, vectors, complex plane, conic sections, limits and calculus. - Three difficulty levels, from fundamentals to university entrance exam level. - Answers are not forced to be integers: type fractions and radicals directly. The answer boxes show the shape of the answer, so you learn how results are written. - Figures label vertices, angles and side ratios; graphs plot key points (intercepts, vertex, center). - Missed problems come back immediately. Bookmarks and mistake analysis let you drill only your weak spots. KYOKUISEN (RANKING) - A daily rating match with a leaderboard grouped by school year. - One attempt per day; watch a video ad to add attempts, up to three per day. - Your nickname and rating are visible to other players. Do not enter your real name or anything you would not want public. - Offline, your own records are shown instead. SUGOKU PREMIUM (IN-APP PURCHASE) - Removes ads. - Three Kyokuisen attempts every day, no video ads needed. - 20 coins at the start of each Kyokuisen season. - Bookmarks up to 500 items (20 on the free tier). - Answer timer with time analysis, plus the Sakura skin. - One-time purchase. Restore from the settings screen. COMMON TEST PREP PLAN (AUTO-RENEWABLE SUBSCRIPTION) - Topic-by-topic practice booklets in the style of Japan's Common Test (in Japanese). One booklet per field (14 in total) is free; the rest are included in the Common Test Prep Plan. - Monthly plan: ¥480 per month. Yearly plan: ¥3,800 per year (prices in Japan; other regions follow the App Store price). - Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically for the same period and price unless auto-renew is turned off at least 24 hours before the end of the current period. - Manage or cancel in your device's Settings > Apple ID > Subscriptions. Restore purchases from the subscription screen. ADS - On the free tier, banner ads appear on the topic list and the result screen. - Video ads play only when you choose to add a Kyokuisen attempt. Ads never interrupt you mid-problem. PLEASE NOTE - The app is available in English and Japanese. When your device language is not Japanese, problem statements, answer fields and choices are shown in English. Hints, step-by-step explanations and Common Test prep booklets remain in Japanese. - Requires iOS 17.0 or later, iPhone and iPad. Study records are stored on your device. Leaderboard data is stored in Apple CloudKit. See the privacy policy for details, or contact us through the support page. Terms of Use: https://ottub.github.io/sugoku/terms.html Privacy Policy: https://ottub.github.io/sugoku/privacy-policy.html