# 扫描仪 vs Arbiter

The clearest difference is update cadence: Arbiter at fortnightly against 扫描仪's every 2 months. 扫描仪's advantage is iOS requirement (11.0 vs 18.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 扫描仪 sells 2 in-app purchases, starting at $40.99 per 3 months and Arbiter sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

扫描仪 ships an update every 2 months, Arbiter fortnightly. Both last shipped on October 8, 2026.

## The numbers

| Metric | 扫描仪 | Arbiter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (16 ratings)](https://appshunter.io/ios/app/arbiter-local-ai-chat/id6747954532/reviews)** |
| Number of ratings | — | **16** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 52 MB | 40 MB |
| Requires iOS | **11.0** | 18.4 |
| Devices | iPhone, iPod | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Herui Business(Guangzhou) Co., Ltd.](https://appshunter.io/developer/1627152786) | [Jordan Stone](https://appshunter.io/developer/1823554814) |

## What reviewers say

### 扫描仪

[App page](https://appshunter.io/ios/app/pdf/id1627152664)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包季 | $40.99 | per 3 months |
| 终身会员 | $59.99 | one-time |


### Arbiter

[App page](https://appshunter.io/ios/app/arbiter-local-ai-chat/id6747954532)

This privacy-focused AI assistant operates entirely on your device, offering offline functionality. Choose from various open-source models to suit your needs, with all conversations securely stored locally. It's ideal for brainstorming, proofreading, and exploring AI capabilities without data collection.

**Highlights:** On-device AI processing, Offline model execution, Document summarization, Privacy-focused design, Multiple AI model selection, Local data storage

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |
| Extra Large Tip | $19.99 | one-time |


## Frequently asked questions

### Is 扫描仪 free?

扫描仪 is free to download, with in-app purchases available.

### Is Arbiter free?

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

### Do 扫描仪 or Arbiter have ads?

Neither 扫描仪 nor Arbiter shows ads.

### Which is updated more often, 扫描仪 or Arbiter?

扫描仪 ships an update every 2 months, and Arbiter fortnightly. Most recently, 扫描仪 was updated on October 8, 2026 and Arbiter on October 8, 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.*