Mental Math vs Subtraction for Kids
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mental Math
This app transforms mental math practice into an engaging game. Solve calculations by writing answers directly on the screen, track progress with badges and records, and enjoy a child-friendly, ad-free experience with parental controls.
- Finger-based answer input
- Timed calculation challenges
- Multiple math operations
- Progress tracking with badges
- Parental controls and profiles
- Ad-free and no data collection
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Calmenta is a playful mental math app to learn and practice addition, subtraction, multiplication and division. Work on times tables up to 12, take on timed challenges and write your answers straight on the screen with your finger. Made for children who want to get better at math at their own pace, Calmenta offers mental math exercises from beginner to extreme, with or without a timer. LEARN AND PRACTICE MENTAL MATH • Addition, subtraction, multiplication, division, comparisons and powers. • Times tables up to 12, one table at a time or all together. • 4 difficulty levels to progress at your own pace. • An “All” mode to mix different types of calculation. • Build your own sets by choosing the operations, the level and the number of calculations. WRITE YOUR ANSWER WITH YOUR FINGER No keyboard needed: just write your answer anywhere on the screen. Calmenta recognizes the digits directly on the device, bringing back a natural way of doing math, close to pencil and paper. 20 CALCULATIONS AGAINST THE CLOCK Take on the challenge with sets of 20 mental math exercises and try to beat your best time. Would you rather practice quietly? Turn on Training mode to play without a timer and without time pressure. PROGRESS EVERY DAY • Beat your records and earn stars. • Collect badges as you progress. • Grow your streak of days played. • Track the operations and levels you have mastered. • Keep improving, one calculation at a time. FOR PARENTS • No ads. • No account required. • Progress data stays on the device. • A parents’ area lets you follow each child’s progress. • See results by operation, mastered levels and records. • Create several child profiles for the whole family. FREE AND PREMIUM Calmenta is free to use with 3 games a day and the first 2 levels. Calmenta Premium unlocks: • Unlimited games. • All 4 difficulty levels. • Several child profiles. • Detailed parental tracking. Mental math, times tables, challenges and progress: practice every day with Calmenta. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Subtraction for Kids
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Free to try. One-time unlock — no subscriptions, no ads. Works offline. No data collected. Subtraction for Kids: Math helps children ages 6–8 learn to take away within 20 in a calm, playful way. Your child counts friendly objects, hops along a number line, solves number sentences and story problems, and traces the numbers 0–9 with the correct stroke order — all at their own pace, with gentle, encouraging feedback and never a timer or a score. What's inside: • Take Away — see subtraction come to life with objects you can tap • Count What's Left — pick-the-answer practice within 20 • Number Line Jumps — a clear, visual way to subtract • Number Sentences — build real math confidence • Missing Number — playful problem solving • Trace the Numbers — write 0–9 the right way • Story Problems — everyday subtraction to 20 Why parents love it: • No ads, no third-party tracking, no data collected — ever • Works completely offline • A parental gate protects every purchase and link • Kind by design: no timers, no scores, no pressure Free to download and try. A single one-time purchase — “Unlock Everything,” a lifetime unlock ($4.99) — opens all lessons and activities. This is a one-time purchase, not a subscription, and full access requires this in-app purchase. Privacy Policy: https://joykhansayan1.github.io/subtraction-for-kids-math/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: https://joykhansayan1.github.io/subtraction-for-kids-math/support.html Great for kindergarten and first grade math, homeschool, and Montessori-style practice.
Screenshots
Verdict
Mental Math and Subtraction for Kids are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Mental Math sells 3 in-app purchases, starting at $3.99 per month and Subtraction for Kids sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Mental Math | Subtraction for Kids |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 73 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | HelloProg | MD Shahariar Nazim Joy |
In-app purchases
Mental Math
- Premium Monthly$3.991 Month
- Abonnement annuel7 Days trial$9.991 Year
- Premium à vie$22.99
Subtraction for Kids
- Unlock Everything$4.99
Questions
Is Mental Math free?
Is Subtraction for Kids free?
Do Mental Math or Subtraction for Kids have ads?
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