# Udan HESS vs Octopus BMS Lite

The clearest difference is update cadence: Udan HESS at every 3 months against Octopus BMS Lite's every 12 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.

Udan HESS ships an update every 3 months, Octopus BMS Lite every 12 months. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Udan HESS | Octopus BMS Lite |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 12 months |
| Size | 33 MB | 32 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Anhui Udan Technology Co., Ltd.](https://appshunter.io/developer/1593792520) | [Shanghai Xinzhiheng Electronic Technology Co., Ltd.](https://appshunter.io/developer/1745374020) |

## What reviewers say

### Udan HESS

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Octopus BMS Lite

[App page](https://appshunter.io/ios/app/octopus-bms-lite/id6505063095)

**In-app purchases:** none


## Frequently asked questions

### Is Udan HESS free?

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

### Is Octopus BMS Lite free?

Octopus BMS Lite is free to download, with no in-app purchases.

### Do Udan HESS or Octopus BMS Lite have ads?

Neither Udan HESS nor Octopus BMS Lite shows ads.

### Which is updated more often, Udan HESS or Octopus BMS Lite?

Udan HESS ships an update every 3 months, and Octopus BMS Lite every 12 months. Most recently, Udan HESS was updated on September 10, 2026 and Octopus BMS Lite on September 9, 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.*