Drutiko vs Sorokun

Numbers don't have to be scary. They can be magic. Ever watched someone multiply huge numbers in their head and wondered if they were secretly a wizard? Spoiler: they're not. They just know the ancient secrets of Vedic Mathematics — and now, so can you. Drutiko turns 1,500-year-old Indian math sutras into a beautiful, playful learning adventure. No dusty textbooks. No endless drills. Just clever shortcuts, satisfying "aha!" moments, and the quiet superpower of solving problems faster than a calculator can boot up. Learn the legendary Vedic techniques Step-by-step interactive tutorials walk you through the four core methods — each one a different flavor of mental-math wizardry: - Nikhilam — multiply numbers near a base in seconds - Urdhva-Tiryak — the famous "vertically and crosswise" trick for multiplying anything - Nikhilam Division — division without the dread - Paravartya — elegant division that feels like cheating (it's not) Practice that actually sticks Guided practice holds your hand at first, then gradually lets go — with hints right when you need them and gentle nudges when you're close. Build real fluency, not memorized tricks. Level up through game stages Turn study sessions into a quest. Climb through difficulty levels, chase high scores, earn feathers for clean solves, and unlock badges that prove just how far you've come. Each stage is a little tougher, a little more satisfying to conquer. Watch yourself get smarter Your personal dashboard tracks your progress, scores, and rewards — so every session feels like leveling up a character that's actually... you. Why you'll love it: - Beautiful, hand-crafted Pattachitra-inspired design - Real mental-math speed you can show off in real life - Bite-sized lessons that fit into any spare moment - Badges, high scores & feathers to keep you coming back - Perfect for students, parents, teachers & lifelong learners Whether you're a student trying to ace exams, a parent wanting to make math fun for once, or just someone who likes feeling like a genius at dinner - Drutiko meets you where you are and takes you somewhere impressive. Download Drutiko today and discover the mathematician hiding inside you. Your future self — the one mentally multiplying three-digit numbers while everyone else reaches for their phone — says thanks. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Main Events (総合種目) This section presents events found in abacus competitions and exams—addition/subtraction, multiplication, and division, along with their respective mental calculation counterparts—tailored to your proficiency level. You can enter your answers directly within the app. In "Practice Mode," you receive immediate feedback on whether your answers are correct or incorrect. "Exam Mode" imposes a time limit, and you cannot check your results until you submit your answers. The problems correspond to the grade levels defined by both the Zen-Shu-Ren and the Nisshu-Ren standards. Flash Anzan (フラッシュ暗算) Flash Anzan involves mentally adding up a rapid succession of numbers displayed on the screen. Two modes are available: "Exam Mode," where you challenge yourself based on specific grade levels, and "Free Mode," which allows you to freely customize the number of entries, number of digits, and display speed. Exam Mode supports the grade standards of both the Zenshuren and the Japan Flash Anzan Association. Dictation of Sums (読上算) This training involves mentally adding and subtracting numbers as they are read aloud. Problems are read using VOICEVOX speech synthesis, and you can select the character who reads them. Like Flash Mental Arithmetic, this feature offers both Exam Mode and Free Mode. In Exam Mode, you can take mock exams based on the Zenshuren's standards. In Free Mode, you can customize the number of entries, the digit range, and the reading speed, as well as choose whether to include only addition or both addition and subtraction.