Speed Calculator
Android app by Ninth Gate Doorkeeper. Education · Ninth Gate Doorkeeper
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- Free to download
- In-app purchases
- Not listed in captured metadata
- Version
- 0.0.15
- Listing last refreshed
- 2026-09-16
View the original store listing
Store description excerpt
How fast can you calculate? Speed Calculator is the mental math quiz that challenges you to answer 10 questions as quickly as possible — and then beat your own best time. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW IT WORKS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Pick a category and a number limit, then race through 10 questions. Each question shows 6 possible answers — tap the right one as fast as you can. Your total time is recorded the moment you finish. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 4 CATEGORIES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Addition — train your sums up to the limit you choose • Subtraction — sharpen your mental subtraction skills • Multiplication — master your times tables and beyond • Division — practice clean, fast division ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 7 DIFFICULTY LEVELS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Choose your number limit: 10, 50, 100, 250, 500, 1000, or 10 000. Start easy and work your way up as your speed improves. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ TRACK YOUR PROGRESS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Your best time for every category and difficulty level is saved automatically. Every quiz is a chance to set a new personal record. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ CLEAN & DISTRACTION-FREE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ No accounts, no subscriptions, no complexity. Just you, the numbers, and the clock. Available in 10 languages: English, French, German, Spanish, Italian, Polish, Portuguese, Russian, Korean, and Chinese.
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