# 手环钥匙 vs Popusign

The clearest difference is update cadence: 手环钥匙 at fortnightly against Popusign's every 5 weeks. 手环钥匙 also leads on iOS requirement (9.0 vs 15.0). 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.

手环钥匙 ships an update fortnightly, Popusign every 5 weeks. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | 手环钥匙 | Popusign |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 65.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Size | 44 MB | 105 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [BYD Auto Industry Company Limited](https://appshunter.io/developer/888165335) | [General Lighting Electronic Co., Ltd.](https://appshunter.io/developer/1775395523) |

## What reviewers say

### 手环钥匙

[App page](https://appshunter.io/ios/app/id1406134435)

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

**In-app purchases:** none


### Popusign

[App page](https://appshunter.io/ios/app/popusign/id6737228339)

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

**In-app purchases:** none


## Frequently asked questions

### Is 手环钥匙 free?

手环钥匙 is free to download, with no in-app purchases.

### Is Popusign free?

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

### Do 手环钥匙 or Popusign have ads?

Neither 手环钥匙 nor Popusign shows ads.

### Which is updated more often, 手环钥匙 or Popusign?

手环钥匙 ships an update fortnightly, and Popusign every 5 weeks. Most recently, 手环钥匙 was updated on October 20, 2026 and Popusign on October 16, 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.*