# HNN Work vs SERS CSKH

The clearest difference is update cadence: HNN Work at every 3 weeks against SERS CSKH's every 3 months. 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.

HNN Work ships an update every 3 weeks, SERS CSKH every 3 months. The most recent releases landed on September 23, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | HNN Work | SERS CSKH |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 48 MB | 33 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [HUNONIC VIET NAM JOINT STOCK COMPANY](https://appshunter.io/developer/1422372871) | [CENTRAL POWER CORPORATION](https://appshunter.io/developer/1679266544) |

## What reviewers say

### HNN Work

[App page](https://appshunter.io/ios/app/hnn-work/id1626800042)

**Features:** macOS Compatibility

**In-app purchases:** none


### SERS CSKH

[App page](https://appshunter.io/ios/app/sers-cskh/id6736721540)

**In-app purchases:** none


## Frequently asked questions

### Is HNN Work free?

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

### Is SERS CSKH free?

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

### Do HNN Work or SERS CSKH have ads?

Neither HNN Work nor SERS CSKH shows ads.

### Which is updated more often, HNN Work or SERS CSKH?

HNN Work ships an update every 3 weeks, and SERS CSKH every 3 months. Most recently, HNN Work was updated on September 23, 2026 and SERS CSKH on October 15, 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.*