Comparison

Know Abacus vs Mental Math

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Know Abacus

This app teaches children how to use an abacus for various math operations. It covers counting, addition, subtraction, multiplication, and division, helping to develop their mathematical abilities and brain potential. It offers multiple learning modes and customization options.

Highlights
  • Abacus counting
  • Addition and subtraction (1 & 2 digits)
  • Multiplication and division (1-2 digits)
  • Mental math practice
  • Review and random lessons
  • Customizable abacus (color, touch)
  • Multiple languages
Read full description

Abacus is a wonderful mathematical instrument used for calculation. This app will help your children learn about Abacus, Numbers, Counting, Addition, and Subtraction. This is the first step to tap the unexploited potential in their brain and unleash their mathematical capability. Suitable for children age 5 and up, who know about numbers and some basic addition and subtraction. For smaller children, recommend KnowNumber app. * Counting with Abacus * Addition/Subtraction 1 digit * Addition/Subtraction 2 digits * Multiplication 1-2 digits * Division 1-2 digits * Mental math * Review lessons * Unlimited random lessons * Black/white or colorful abacus * Learning modes * Two-touch or multi-touch abacus * Left-handed mode Localized Languages: * English, French, Spanish, Thai, Turkey, Arabic, Portuguese, and Russian

About

Mental Math

Enhance your arithmetic abilities with daily math challenges. This app offers over 30 difficulty levels, personalized exercises, and progress tracking to help users of all ages improve their calculation speed and accuracy.

Highlights
  • 30+ difficulty levels
  • Personalized exercises
  • Progress tracking
  • Quick sessions
  • User-friendly design
  • Engaging and interactive
Features
Read full description

Boost Your Mental Math Skills – Anytime, Anywhere! Sharpen your mental math skills or take on exciting number challenges with the ultimate math-practice companion! Challenge Your Brain: Explore 30+ difficulty levels, from basic addition and subtraction to multiplication tables and division. Perfect for kids, students, and math enthusiasts! Tailored Learning: Progress at your own pace with exercises matched to your skill level. Each level has its own icon to help you track achievements and keep improving. Track Your Progress: Review detailed summaries after each session to spot strengths and areas to improve. Restart levels anytime to aim for perfection! Fun for All Ages: Designed to be engaging, interactive, and rewarding for learners of all ages. Why Choose Us? • Clean, user-friendly design. • Quick sessions to fit any schedule. • Perfect for students, educators, and lifelong learners. Download now and start your journey to mental-math mastery! Practice smarter, calculate faster, and enjoy the challenge. Subscription Information: The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage your subscription or turn off auto-renew in your iTunes account settings. Any unused portion of a free trial period will be forfeited when you purchase a subscription. Support & Policies: • support@ulilab.com • https://ulilab.com • Privacy Policy: https://ulilab.com/privacy • Terms of Use: https://ulilab.com/terms

Screenshots

Know Abacus4 screens
Mental Math4 screens

Verdict

The call

The clearest difference is ads: Mental Math at none against Know Abacus's shown. Mental Math also leads on rating (5.0 vs 4.7) and update cadence (every 3 weeks vs every 2 months). Know Abacus's advantage is ratings volume (67 vs 5) and iOS requirement (11.0 vs 17.1). On price, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Know Abacus sells 1 one-off in-app purchase and Mental Math sells 10 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Mental Math holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Know Abacus has 67 ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

Know Abacus ships an update every 2 months, Mental Math every 3 weeks. The most recent releases landed on July 6, 2026 and September 22, 2026 respectively.

Scorecard5 real differences · 5 level
Know Abacus versus Mental Math: the parameters behind the verdict, then further details
ParameterKnow AbacusMental Math
PriceFreeFree
Rating4.7 (67 ratings)5.0 (5 ratings) — better
Positive reviews96.4% of reviews—
Number of ratings67 — better5
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better17.1
Further details — not scored
Size28 MB28 MB
Age rating4+4+
DeveloperKittipong MungnirunAndrey Lebedev

Customer experience

Know Abacus

All ratings67 ratings
Positive94.0%
Neutral1.5%
Negative4.5%
Written reviews28 reviews
Positive96.4%
Neutral3.6%
Negative0.0%

Mental Math

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Know Abacus

One-time1
  • Remove Ads$2.99
10 purchases

Mental Math

Subscriptions9
  • Premium Plus$4.997 Days
  • Premium Plus3 Days trial$4.997 Days
  • Premium Plus$5.991 Month
Show 6 more
  • Premium Plus$11.993 Months
  • Premium Plus$14.991 Year
  • Premium Plus$17.491 Year
  • Premium Plus$24.991 Year
  • Premium Plus7 Days trial$24.991 Year
  • Premium Plus7 Days trial$39.991 Year
One-time1
  • Premium Plus$39.99

Questions

Is Know Abacus free?
Know Abacus is free to download, with in-app purchases available.
Is Mental Math free?
Mental Math is free to download, with in-app purchases available.
Which has better reviews, Know Abacus or Mental Math?
Mental Math is rated higher. Know Abacus averages 4.7 out of 5 from 67 ratings, while Mental Math averages 5.0 from 5 ratings.
Do Know Abacus or Mental Math have ads?
Know Abacus shows ads; Mental Math does not.
Which is updated more often, Know Abacus or Mental Math?
Know Abacus ships an update every 2 months, and Mental Math every 3 weeks. Most recently, Know Abacus was updated on July 6, 2026 and Mental Math on September 22, 2026.

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