# Calculation Practice vs Know Abacus

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).

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.

## The numbers

| Metric | Calculation Practice | Know Abacus |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.8 (78 ratings)](https://appshunter.io/ios/app/know-abacus/id641867438/reviews)** |
| Number of ratings | — | **78** |
| Positive reviews | 0.0% of reviews | **96.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 28 MB |
| Requires iOS | 18.2 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hideomi Sato](https://appshunter.io/developer/601939713) | [Kittipong Mungnirun](https://appshunter.io/developer/488058533) |

## What reviewers say

### Calculation Practice

[App page](https://appshunter.io/ios/app/calculation-practice/id601939710)

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.

**Highlights:** Randomized calculation problems, Multiple-choice answers, Auditory feedback for correct answers, Progress tracking (correct answers, time), Daily practice reinforcement

**Features:** macOS Compatibility

**In-app purchases:** none


### Know Abacus

[App page](https://appshunter.io/ios/app/know-abacus/id641867438)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Calculation Practice free?

Calculation Practice costs $0.99, with no in-app purchases.

### Is Know Abacus free?

Know Abacus is free to download, with in-app purchases available.

### Do Calculation Practice or Know Abacus have ads?

Know Abacus shows ads; Calculation Practice does not.

### Which is updated more often, Calculation Practice or Know Abacus?

Calculation Practice ships an update every 17 months, and Know Abacus every 2 months. Most recently, Calculation Practice was updated on November 1, 2026 and Know Abacus on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*