# Abacus AI vs EchoMuseum

The clearest difference is in-app purchases: EchoMuseum at none against Abacus AI's 5. EchoMuseum also leads on update cadence (every 3 weeks vs every 6 weeks). Abacus AI's advantage is iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Abacus AI sells 5 one-off in-app purchases. EchoMuseum asks for nothing beyond the download.

Abacus AI ships an update every 6 weeks, EchoMuseum every 3 weeks. The most recent releases landed on October 18, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Abacus AI | EchoMuseum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 884 MB | 6 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Guangzhou Fabaceous Seedling Iinformation Technology Co., Ltd.](https://appshunter.io/developer/1231700775) | [北京竞律网络科技有限公司](https://appshunter.io/developer/1647096676) |

## What reviewers say

### Abacus AI

[App page](https://appshunter.io/ios/app/abacus-ai-student-version/id6677015880)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 珠心算Ai学生端会员(3月) | $49.99 | one-time |
| 珠心算Ai学生端会员（半年） | $99.99 | one-time |
| 珠心算Ai学生端会员（1年） | $129.99 | one-time |
| 珠心算Ai学生端会员（3年） | $149.99 | one-time |
| 珠心算Ai学生端会员（2年） | $199.99 | one-time |


### EchoMuseum

[App page](https://appshunter.io/ios/app/echomuseum/id6764727941)

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

**In-app purchases:** none


## Frequently asked questions

### Is Abacus AI free?

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

### Is EchoMuseum free?

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

### Do Abacus AI or EchoMuseum have ads?

Neither Abacus AI nor EchoMuseum shows ads.

### Which is updated more often, Abacus AI or EchoMuseum?

Abacus AI ships an update every 6 weeks, and EchoMuseum every 3 weeks. Most recently, Abacus AI was updated on October 18, 2026 and EchoMuseum on October 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.*