# Screen Ruler vs 1C IoT

The clearest difference is in-app purchases: 1C IoT at none against Screen Ruler's 2. 1C IoT also leads on ads (none vs shown) and update cadence (weekly vs every 3 months). Screen Ruler's advantage is iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Screen Ruler sells 2 one-off in-app purchases. 1C IoT asks for nothing beyond the download.

Screen Ruler ships an update every 3 months, 1C IoT weekly. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Screen Ruler | 1C IoT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (26 ratings)](https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 53.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [向阳 杨](https://appshunter.io/developer/1174757734) | [1C Ltd](https://appshunter.io/developer/1724284853) |

## What reviewers say

### Screen Ruler

[App page](https://appshunter.io/ios/app/screen-ruler-measure-length/id1174757735)

Transform your iPhone or iPad into a digital ruler. Measure small objects directly on your screen using centimeters or inches, with magnifier assistance and haptic feedback for precise alignment. Calibrate the ruler for accurate results.

**Highlights:** Calibratable digital ruler, Centimeter and inch scales, Magnifier for precise alignment, Haptic feedback, Measure small objects on screen

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ads-free experience | $1.99 | one-time |
| Support for a cup of coffee | $2.99 | one-time |


### 1C IoT

[App page](https://appshunter.io/ios/app/1c-iot/id6746370106)

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

**In-app purchases:** none


## Frequently asked questions

### Is Screen Ruler free?

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

### Is 1C IoT free?

1C IoT is free to download, with no in-app purchases.

### Do Screen Ruler or 1C IoT have ads?

Screen Ruler shows ads; 1C IoT does not.

### Which is updated more often, Screen Ruler or 1C IoT?

Screen Ruler ships an update every 3 months, and 1C IoT weekly. Most recently, Screen Ruler was updated on November 6, 2026 and 1C IoT on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*