# 蓝牙标签 vs Ruler Studio

The clearest difference is in-app purchases: 蓝牙标签 at none against Ruler Studio's 1. 蓝牙标签 also leads on update cadence (every 9 days vs every 6 weeks). Ruler Studio's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Ruler Studio sells 1 one-off in-app purchase. 蓝牙标签 asks for nothing beyond the download.

蓝牙标签 ships an update every 9 days, Ruler Studio every 6 weeks. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 蓝牙标签 | Ruler Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (3 ratings)](https://appshunter.io/ios/app/id1601790987/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 6 weeks |
| Size | 34 MB | 19 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Picksmart Technology Co., Ltd.](https://appshunter.io/developer/1600223541) | [Spyridon Bousios](https://appshunter.io/developer/1168309944) |

## What reviewers say

### 蓝牙标签

[App page](https://appshunter.io/ios/app/id1601790987)

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

**In-app purchases:** none


### Ruler Studio

[App page](https://appshunter.io/ios/app/ruler-studio/id6777489772)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler Pro Lifetime | $2.99 | one-time |


## Frequently asked questions

### Is 蓝牙标签 free?

蓝牙标签 is free to download, with no in-app purchases.

### Is Ruler Studio free?

Ruler Studio is free to download, with in-app purchases available.

### Do 蓝牙标签 or Ruler Studio have ads?

Neither 蓝牙标签 nor Ruler Studio shows ads.

### Which is updated more often, 蓝牙标签 or Ruler Studio?

蓝牙标签 ships an update every 9 days, and Ruler Studio every 6 weeks. Most recently, 蓝牙标签 was updated on November 12, 2026 and Ruler Studio on October 31, 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.*