# Ruler App vs Physics Labs

The clearest difference is review sentiment: Physics Labs at 100% against Ruler App's 0%. Physics Labs also leads on price (Free vs $0.99) and update cadence (every 2 weeks vs every 11 months). Ruler App's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.6). On in-app purchases and device support there is nothing between them.

Physics Labs is free to download; Ruler App costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ruler App ships an update every 11 months, Physics Labs every 2 weeks. The most recent releases landed on October 14, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Ruler App | Physics Labs |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/ruler-app/id303731879/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | Paid | **Ad-supported** |
| Size | 2 MB | 32 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Huseyin Aykut Uludag](https://appshunter.io/developer/1469165629) |

## What reviewers say

### Ruler App

[App page](https://appshunter.io/ios/app/ruler-app/id303731879)

Transform your iPhone or Apple Watch into a precise measuring tool. Easily switch between imperial and metric units and adjust the ruler's height for direct comparisons. Customize your experience with different color schemes.

**Highlights:** Imperial and metric scale switching, Adjustable ruler height, Color scheme customization, Apple Watch compatibility, Switchable ruler scales

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Physics Labs

[App page](https://appshunter.io/ios/app/physics-labs/id6472849584)

This app uses your device's sensors to measure various physical quantities like acceleration, magnetic fields, and sound levels. View data in coordinates or scalar magnitude, and export it to Excel for analysis. It's a digital lab for your phone.

**Highlights:** Measure acceleration, magnetic fields, and sound levels, View data in X, Y, Z coordinates or scalar magnitude, Export sensor data to Excel for analysis, Eliminate gravity from acceleration measurements, Measure atmospheric pressure

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ruler App free?

Ruler App costs $0.99, with no in-app purchases.

### Is Physics Labs free?

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

### Do Ruler App or Physics Labs have ads?

Physics Labs shows ads; Ruler App does not.

### Which is updated more often, Ruler App or Physics Labs?

Ruler App ships an update every 11 months, and Physics Labs every 2 weeks. Most recently, Ruler App was updated on October 14, 2026 and Physics Labs on September 18, 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.*