Quick Math Jam vs デカ文字計算
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Quick Math Jam
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Quick Math Jam turns everyday math practice into fast, focused two-minute sessions that actually stick. Whether you're building fluency in addition or leveling up to multiplication and division, every jam adapts to you — so practice always feels challenging but never overwhelming. WHY QUICK MATH JAM • Two-minute jams — bite-sized timed rounds that fit any schedule • Adaptive learning path — a 100-level journey that adjusts to your skill • Instant feedback — see what you got right and learn from every miss • Real motivation — streaks, XP, badges, and clear progress reports PRACTICE EVERY SKILL • Addition, subtraction, multiplication, and division • Mixed operations for all-round fluency • Compare, missing number, missing sign, and match-the-answer challenges • Vertical or horizontal problem layouts — solve it the way you think ANSWER YOUR WAY • Tap a choice, type it in, write by hand, or say it out loud • Handwriting and voice input make practice feel natural FIND YOUR LEVEL • A quick adaptive skill check places you at the right starting point • Custom practice lets you target exactly what you want to improve TRACK EVERYTHING • Daily goals and gentle reminders build a consistent habit • Complete history, accuracy, and speed reports show how you're growing • Review your mistakes and turn them into strengths • Progress syncs across your devices with iCloud BUILT FOR FOCUS • Clean, friendly design with no ads and no distractions • Great for kids, students, and adults keeping their math sharp QUICKMATH PRO Unlock the full adaptive learning path, custom practice, handwriting and voice answers, complete reports, and every future feature with QuickMath Pro. Choose a monthly or annual subscription, or buy Lifetime once and own it forever. Start your first jam today — two minutes is all it takes. — Payment is charged to your Apple Account. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period; manage or cancel anytime in your Apple Account settings. Terms of Service: https://van-soft.github.io/support/mj-terms.html Privacy Policy: https://van-soft.github.io/support/mj-privacy.html
デカ文字計算
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デカ文字計算 (Dekamoji Keisan) is an arithmetic app with big text that anyone can pick up and enjoy. There is no time limit. Go at your own pace, 10 questions at a time. A little exercise for the mind whenever you have a spare moment. ■ Easy to see, easy to tap ・Numbers and buttons are shown large ・Choose from three text sizes ・A landscape layout that makes full use of the screen ■ Never rushed ・No time limits and no countdowns ・When you miss one, the app simply shows you the right answer ・A handwriting memo pad for working things out ■ Choose what to practice ・Addition, subtraction, multiplication, division, decimals and fractions ・"Random" picks the questions for you ・"Review" lets you retry the questions you missed ■ Reasons to keep going ・Your level goes up as you answer correctly ・Earn a gold, silver or bronze medal for each set of 10 questions ・Look back at your records at any time ■ Use it with peace of mind ・Works without an internet connection ・No account or login needed ・No personal information is collected ・Export your records to a file and carry them over to a new device ■ And more ・Turn background music, sound effects and vibration on or off separately ・Available in Japanese and English
Screenshots
Verdict
The clearest difference is in-app purchases: デカ文字計算 at none against Quick Math Jam's 3. デカ文字計算 also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Quick Math Jam sells 3 in-app purchases, starting at $0.99 per month. デカ文字計算 asks for nothing beyond the download.
Quick Math Jam ships an update every 3 weeks, デカ文字計算 every 4 weeks. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.
| Parameter | Quick Math Jam | デカ文字計算 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 44 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Guizhou Vanilla Information Technology Co., Ltd. | maple project |
In-app purchases
Quick Math Jam
- QuickMath Pro Monthly$0.991 Month
- QuickMath Pro Annual$5.991 Year
- QuickMath Pro Lifetime$12.99
デカ文字計算
No in-app purchases





