# Chấm Công vs OS PLUS

The clearest difference is update cadence: OS PLUS at fortnightly against Chấm Công's every 17 months. Chấm Công's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 16.6). On price, ads and in-app purchases there is nothing between them.

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

Chấm Công ships an update every 17 months, OS PLUS fortnightly. The most recent releases landed on September 17, 2026 and July 19, 2026 respectively.

## The numbers

| Metric | Chấm Công | OS PLUS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Fortnightly** |
| Size | 53 MB | 74 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MB360.VN ECOMMERCE JOINT STOCK COMPANY](https://appshunter.io/developer/741559139) | [cuong le](https://appshunter.io/developer/1677985116) |

## What reviewers say

### Chấm Công

[App page](https://appshunter.io/ios/app/cham-cong/id1481048736)

**Features:** macOS Compatibility

**In-app purchases:** none


### OS PLUS

[App page](https://appshunter.io/ios/app/os-plus/id6446452345)

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

**In-app purchases:** none


## Frequently asked questions

### Is Chấm Công free?

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

### Is OS PLUS free?

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

### Do Chấm Công or OS PLUS have ads?

Neither Chấm Công nor OS PLUS shows ads.

### Which is updated more often, Chấm Công or OS PLUS?

Chấm Công ships an update every 17 months, and OS PLUS fortnightly. Most recently, Chấm Công was updated on September 17, 2026 and OS PLUS on July 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.*