Anzan Expert vs Flash Mental Math (Anzan)

Ever find that "6 + 9" is easy, but "7 + 9" feels tricky? Do you struggle with certain number combinations? I did! As the author of this app, I used to find combinations involving 8 or 9 particularly challenging. I also found it difficult to quickly calculate prices while shopping. That's why I created this flash calculation app – to improve my own mental math skills! And while developing and testing it, I've already noticed a real improvement in my addition skills. I'm confident you'll see a boost in your own mental math abilities too! I hope you have fun and enjoy your challenges! HOW TO US Numbers flash on the screen at a set interval. Add them up in your head! STAGES There are 20 stages, each combining one of 5 different digit lengths (1 to 5 digits) with one of 4 flash intervals (6, 3, 1, and 0.5 seconds). The most challenging stage is 5 digits with a 0.5-second interval – a true test of your skills! If you ever reach that level, you'll be a real "expert"! Each stage has a unique name. - 1 digit, 6-second interval: "Shell" stage - 1 digit, 3-second interval: "Prawn" stage - 1 digit, 1-second interval: "Turtle" stage and so on... EXPERT MEDALS AND LEVELS Earn an expert medal for each stage by answering correctly 5 times in a row at that stage. Your current level is determined by the highest-level stage where you've earned a medal. How far can you go? Find out now! PRACTICE Unlike the timed challenges, you can advance at your own pace by tapping the buttons. Easily switch between numbers, review previous values, and practice as much as you like until you feel confident and ready to ace the challenges! REVIEW After each challenge, review the numbers you just worked on. Practice the questions you missed until you can solve them correctly within the time limit. OTHER USEFUL FEATURES - Register multiple challengers so that the whole family can enjoy the app on a single device! - Customize the look with multiple colorful themes - great for distinguishing each challenger! - Share your success! Post your challenge results with a photo on social media.

A flash anzan trainer built around precise timing. The numbers keep an exact rhythm and the sound lands with them, so even at high speed you can keep your mind on the calculation. THREE THINGS ABOUT THIS APP Precise display and sound The moment each number appears is worked out from the time since the start, on every frame, so the spacing never drifts however many numbers there are. The sound plays at the same moment the number changes. From 20 Kyu to 20 Dan, step by step You start with 2 one-digit numbers and work up as the count grows and the time shrinks. Test Mode puts you through the same 40 grades as the abacus, from 20 Kyu to 20 Dan. Ten questions, seven right to pass. Compete with your class Set the same Room ID and you see a ranking of just that room. A soroban class or a family can share one Room ID and keep practising against people they know. There is a global ranking too. MAIN FEATURES Stages 1 to 6 digits, 350 steps per digit, 2,100 in all. The count of numbers and the speed change little by little. Test Mode 40 grades from 20 Kyu to 20 Dan. Ten questions a round, seven right to pass. Grades you pass are recorded. From 20 Kyu to 17 Kyu the first number appears as abacus beads. Rankings Five rankings: stages cleared, test grade, attempts, login streak and total logins. Global and room, both. No account and no sign-in. You can change your display name and Room ID in the settings. Custom Mode (monthly plan) Choose the digits, the count of numbers, the seconds and how many questions run back to back. Digits 1 to 7, numbers 2 to 30, seconds in steps of 0.1, and 1 to 30 questions. Display settings Four text colours and two fonts. Light and dark modes. Login streak Counts the days you keep coming back, and the total. You can compare those in the rankings too. WHO IT IS FOR • People learning at a soroban class who want to practise flash anzan at home • People who want grades to aim at while they practise • Teachers who want their students practising on the same terms • Adults who want to work their head FREE AND THE MONTHLY PLAN All 2,100 stages, Test Mode and the rankings are free. The monthly plan removes the ads and unlocks Custom Mode. QUESTIONS Do I need an account? No. Open it and practise. A display name is given to you and you can change it in the settings. What age is it for? Once you can add numbers. It starts at 2 one-digit numbers in 4 seconds. Can a soroban class use it? Yes. Set the same Room ID and the ranking covers just that class. Can I practise multiplication or division? No. This app is addition only. LANGUAGES Japanese, English, Chinese (Simplified), Korean, Spanish, Portuguese, French, German and Italian. It follows the language of your device. Note: the Kyu and Dan grades in Test Mode are our own yardstick inside the app. They are not connected to any examining body. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/