# Ruler vs NSPower

The clearest difference is in-app purchases: NSPower at none against Ruler's 2. NSPower also leads on iOS requirement (13.0 vs 16.0). Ruler's advantage is update cadence (every 6 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Ruler sells 2 in-app purchases, starting at $4.99 per 7 days. NSPower asks for nothing beyond the download.

Ruler ships an update every 6 days, NSPower every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ruler | NSPower |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (42 ratings)](https://appshunter.io/ios/app/ruler-measuring-tape/id6752295073/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 108 MB | 28 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [URVO PIIRISILD](https://appshunter.io/developer/1840348316) | [Jiangsu Sooner Co., Ltd.](https://appshunter.io/developer/1854648026) |

## What reviewers say

### Ruler

[App page](https://appshunter.io/ios/app/ruler-measuring-tape/id6752295073)

Transform your phone into a precise measuring tool for any task. Accurately measure small objects on your screen or larger items using augmented reality. Save your measurements and switch between units effortlessly.

**Highlights:** Dual measurement modes (screen/AR), Supports inches, centimeters, millimeters, Fast and accurate results, Measurement history saving, Intuitive user interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler – Measure Tool | $4.99 | per 7 days |
| Ruler – Measure Tool | $19.99 | per year |


### NSPower

[App page](https://appshunter.io/ios/app/nspower/id6760094401)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ruler free?

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

### Is NSPower free?

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

### Do Ruler or NSPower have ads?

Neither Ruler nor NSPower shows ads.

### Which is updated more often, Ruler or NSPower?

Ruler ships an update every 6 days, and NSPower every 3 weeks. Most recently, Ruler was updated on November 5, 2026 and NSPower 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.*