# Lark one vs Zlen 扫描

The clearest difference is update cadence: Lark one at every 3 months against Zlen 扫描's every 5 months. Lark one also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Lark one ships an update every 3 months, Zlen 扫描 every 5 months. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Lark one | Zlen 扫描 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Size | 23 MB | 45 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Hefei Yingsaite Information Technology Co., Ltd.](https://appshunter.io/developer/1583528469) | [Haifeng Zhao](https://appshunter.io/developer/1894176651) |

## What reviewers say

### Lark one

[App page](https://appshunter.io/ios/app/lark-one/id6754667515)

**Features:** macOS Compatibility

**In-app purchases:** none


### Zlen 扫描

[App page](https://appshunter.io/ios/app/zlen/id6763501853)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lark one free?

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

### Is Zlen 扫描 free?

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

### Do Lark one or Zlen 扫描 have ads?

Neither Lark one nor Zlen 扫描 shows ads.

### Which is updated more often, Lark one or Zlen 扫描?

Lark one ships an update every 3 months, and Zlen 扫描 every 5 months. Most recently, Lark one was updated on October 18, 2026 and Zlen 扫描 on October 19, 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.*