# Bosswell博士韋爾 vs ±0正負零

The clearest difference is update cadence: ±0正負零 at every 9 days against Bosswell博士韋爾's monthly. 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.

Bosswell博士韋爾 ships an update monthly, ±0正負零 every 9 days. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Bosswell博士韋爾 | ±0正負零 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free | — |
| Size | 4 MB | 75 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WISDOM CITY TECHNOLOGY LTD.](https://appshunter.io/developer/1118243095) | [冠源 余](https://appshunter.io/developer/1100084170) |

## What reviewers say

### Bosswell博士韋爾

[App page](https://appshunter.io/ios/app/bosswell/id1118243096)

Monitor and control your air purifier remotely. View real-time air quality data, adjust settings, and manage your devices. Includes features for reporting issues and initial setup.

**Highlights:** Real-time air quality monitoring, Remote device control, Device information management, Password management, Online repair reporting, Device initialization and Wi-Fi setup

**Features:** macOS Compatibility

**In-app purchases:** none


### ±0正負零

[App page](https://appshunter.io/ios/app/0/id6739824373)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bosswell博士韋爾 free?

Bosswell博士韋爾 is free to download, with no in-app purchases.

### Is ±0正負零 free?

±0正負零 is free to download, with no in-app purchases.

### Do Bosswell博士韋爾 or ±0正負零 have ads?

Neither Bosswell博士韋爾 nor ±0正負零 shows ads.

### Which is updated more often, Bosswell博士韋爾 or ±0正負零?

Bosswell博士韋爾 ships an update monthly, and ±0正負零 every 9 days. Most recently, Bosswell博士韋爾 was updated on October 16, 2026 and ±0正負零 on October 13, 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.*