# RfnBMS vs Udan HESS

The clearest difference is update cadence: Udan HESS at every 3 months against RfnBMS's every 24 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.

RfnBMS ships an update every 24 months, Udan HESS every 3 months. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | RfnBMS | Udan HESS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 3 months** |
| Size | 2 MB | 33 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [亚妹 李](https://appshunter.io/developer/1621258401) | [Anhui Udan Technology Co., Ltd.](https://appshunter.io/developer/1593792520) |

## What reviewers say

### RfnBMS

[App page](https://appshunter.io/ios/app/rfnbms/id1621684342)

**Features:** macOS Compatibility

**In-app purchases:** none


### Udan HESS

[App page](https://appshunter.io/ios/app/udan-hess/id6443758347)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RfnBMS free?

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

### Is Udan HESS free?

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

### Do RfnBMS or Udan HESS have ads?

Neither RfnBMS nor Udan HESS shows ads.

### Which is updated more often, RfnBMS or Udan HESS?

RfnBMS ships an update every 24 months, and Udan HESS every 3 months. Most recently, RfnBMS was updated on September 25, 2026 and Udan HESS on September 10, 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.*