# 北斗星HD vs 水质多参数APP

The clearest difference is iOS requirement: 北斗星HD at 8.0 against 水质多参数APP's 12.0. On price, update cadence, 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.

北斗星HD ships an update every 4 months, 水质多参数APP every 7 months. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 北斗星HD | 水质多参数APP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Size | 216 MB | 29 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ShenZhen Jimi IoT Co.,Ltd](https://appshunter.io/developer/1147090382) | [Xiamen Standards Scientific Instrument Co.,Ltd.](https://appshunter.io/developer/1194436536) |

## What reviewers say

### 北斗星HD

[App page](https://appshunter.io/ios/app/hd/id1234161950)

**In-app purchases:** none


### 水质多参数APP

[App page](https://appshunter.io/ios/app/app/id1450483863)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 北斗星HD free?

北斗星HD is free to download, with no in-app purchases.

### Is 水质多参数APP free?

水质多参数APP is free to download, with no in-app purchases.

### Do 北斗星HD or 水质多参数APP have ads?

Neither 北斗星HD nor 水质多参数APP shows ads.

### Which is updated more often, 北斗星HD or 水质多参数APP?

北斗星HD ships an update every 4 months, and 水质多参数APP every 7 months. Most recently, 北斗星HD was updated on October 5, 2026 and 水质多参数APP on October 6, 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.*