Calculation Practice vs Know Abacus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculation Practice
Master fundamental math skills with this interactive flashcard app. Choose the correct answer from multiple choices for randomly generated calculations. Track your progress with accuracy and time metrics after each session.
- Randomized calculation problems
- Multiple-choice answers
- Auditory feedback for correct answers
- Progress tracking (correct answers, time)
- Daily practice reinforcement
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A "calculation card" is a study application for mastering fundamental calculation. You choose the answer regarded as right as the numerical calculation displayed at random from three candidates. We announce you a correct answer to sound. After all the lessons finish, the number of correct answers and time are displayed. The skill of calculation could be made to raise by repeating every day.
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.
- 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
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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
Screenshots
Verdict
The clearest difference is review sentiment: Know Abacus at 96% against Calculation Practice's 0%. Know Abacus also leads on price (Free vs $0.99) and update cadence (every 2 months vs every 17 months). Calculation Practice's advantage is in-app purchases (none vs 1) and ads (none vs shown).
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Know Abacus is free to download; Calculation Practice costs $0.99 up front. Know Abacus sells 1 one-off in-app purchase. Calculation Practice asks for nothing beyond the download.
Calculation Practice ships an update every 17 months, Know Abacus every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | Calculation Practice | Know Abacus |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 4.8 (78 ratings) — better |
| Positive reviews | 0.0% of reviews | 96.4% of reviews — better |
| Number of ratings | — | 78 — better |
| Update frequency | Every 17 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.2 | 11.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Hideomi Sato | Kittipong Mungnirun |
Customer experience
Calculation Practice
Know Abacus
In-app purchases
Calculation Practice
No in-app purchases
Know Abacus
- Remove Ads$2.99
Questions
Is Calculation Practice free?
Is Know Abacus free?
Do Calculation Practice or Know Abacus have ads?
Which is updated more often, Calculation Practice or Know Abacus?
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