Anzan Expert vs 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.

Solve it. Feel the beat. Anzan+ turns mental math into a quick, playful challenge. Answer 10 questions, build your combo, and hear the music grow with every streak. A QUICK ROUND, ANYTIME Choose Easy, Normal, or Hard and jump into a 10-question challenge. Practice addition and subtraction on Easy, or mix in multiplication and division on Normal and Hard. BUILD THE BEAT Consecutive correct answers build your combo. Reach 3 to add the bass, then 5 to bring in the melody. Enjoy responsive keys, short sound effects, and optional haptic feedback. GO FOR FEVER Get all 10 questions right to unlock an optional 15-second bonus round. Keep solving and see how many bonus answers you can get. BEAT YOUR PERSONAL BEST Complete a perfect round to save your best time for that difficulty. See your accuracy, time, and best combo, then share your result with friends. PRACTICE AT YOUR OWN PACE Practice without a countdown and revisit questions you missed. Choose the difficulty that suits you and make progress one round at a time. MAKE IT YOURS Turn music, haptics, and celebration effects on or off. No account is required, and your personal bests are stored on your device. “Anzan” means mental arithmetic in Japanese. Pick a level, press Start, and find your flow.