# Abacus Simulator vs OptClass

The clearest difference is in-app purchases: OptClass at none against Abacus Simulator's 10. OptClass also leads on update cadence (every 2 days vs every 3 weeks). Abacus Simulator's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Abacus Simulator sells 10 one-off in-app purchases. OptClass asks for nothing beyond the download.

Abacus Simulator ships an update every 3 weeks, OptClass every 2 days. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Abacus Simulator | OptClass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (31 ratings)](https://appshunter.io/ios/app/abacus-simulator/id1558355099/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 72.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 51 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Ang](https://appshunter.io/developer/1558355101) | [Round Bytes](https://appshunter.io/developer/1867730432) |

## What reviewers say

### Abacus Simulator

[App page](https://appshunter.io/ios/app/abacus-simulator/id1558355099)

Enhance your mental math abilities with interactive abacus exercises. This app offers guided lessons and daily drills to improve calculation speed, focus, and accuracy. Customize your abacus for a fun and engaging learning experience.

**Highlights:** Interactive abacus exercises, Guided step-by-step lessons, Daily skill-sharpening exercises, Focus, speed, and accuracy improvement, Customizable abacus

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud Beads | $1.99 | one-time |
| Coconut Beads | $1.99 | one-time |
| Lemon Beads | $1.99 | one-time |
| Mushroom Beads | $1.99 | one-time |
| Penguin Beads | $1.99 | one-time |
| Flower Beads | $1.99 | one-time |
| Orange Beads | $1.99 | one-time |
| Snail Beads | $1.99 | one-time |
| Snowman Beads | $1.99 | one-time |
| Watermelon Beads | $1.99 | one-time |


### OptClass

[App page](https://appshunter.io/ios/app/optclass/id6760636981)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Abacus Simulator free?

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

### Is OptClass free?

OptClass is free to download, with no in-app purchases.

### Do Abacus Simulator or OptClass have ads?

Neither Abacus Simulator nor OptClass shows ads.

### Which is updated more often, Abacus Simulator or OptClass?

Abacus Simulator ships an update every 3 weeks, and OptClass every 2 days. Most recently, Abacus Simulator was updated on September 21, 2026 and OptClass on September 13, 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.*