# Angle Gradient Inclinometer vs AR Ruler

The clearest difference is in-app purchases: Angle Gradient Inclinometer at none against AR Ruler's 13. Angle Gradient Inclinometer also leads on review sentiment (51% vs 36%) and iOS requirement (13 vs 16.0). AR Ruler's advantage is update cadence (every 3 weeks vs every 8 months) and rating (4.6 vs 4.3). On price, ads and device support there is nothing between them.

Both are free to download. AR Ruler sells 11 in-app purchases, starting at $4.99 per 7 days. Angle Gradient Inclinometer asks for nothing beyond the download.

AR Ruler holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 314 and 975 respectively. Written reviews complicate that: 51% of Angle Gradient Inclinometer's written reviews are positive against 36% of AR Ruler's, so the app with the better star average is not the one people write more warmly about.

Angle Gradient Inclinometer ships an update every 8 months, AR Ruler every 3 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Angle Gradient Inclinometer | AR Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (314 ratings)](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112/reviews) | **[4.6 (975 ratings)](https://appshunter.io/ios/app/ar-ruler-digital-tape-measure/id1326773975/reviews)** |
| Number of ratings | 314 | **975** |
| Positive reviews | **51.1% of reviews** | 35.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | **Ad-supported** | Freemium |
| Size | 11 MB | 397 MB |
| Requires iOS | **13** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Grymala sp. z o.o.](https://appshunter.io/developer/1686597408) |

## What reviewers say

### Angle Gradient Inclinometer

[App page](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112)

Easily measure tilt angles with this free protractor app. It displays inclination from 0 to 359 degrees, along with gradient percentages and angles summing to 180 or 360 degrees. Switch to theodolite mode to set a specified angle to zero.

**Highlights:** Measure tilt angles 0-359 degrees, Display gradient percentage, Show sum angles (180/360), Theodolite mode, Set specified angle to zero

**Features:** Vision Pro support

**In-app purchases:** none


### AR Ruler

[App page](https://appshunter.io/ios/app/ar-ruler-digital-tape-measure/id1326773975)

This app uses your phone's camera and AR technology to measure distances, lengths, angles, areas, and volumes of real-world objects. It offers a variety of tools for quick and precise measurements, suitable for both home and professional use.

**Highlights:** AR technology for precise measurements, Measure length, height, distance, and angles, Calculate area, volume, and perimeters, Tools for various shapes (rectangles, circles, cubes), Room measurement and wall adjustments, Home screen widgets for faster access

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AR Ruler Weekly | $4.99 | per 7 days |
| AR Ruler Weekly | $12.99 | per 7 days |
| Premium | $19.99 | per 7 days |
| AR Ruler Monthly | $19.99 | per month |
| AR Ruler Monthly | $19.99 | per month |
| Special Annual Subscription | $44.99 | per year |
| Three-month AR Ruler | $49.99 | per 3 months |
| Annual AR Ruler | $69.99 | per year |
| Premium | $89.99 | per year |
| Annual AR Ruler | $89.99 | per year |
| Remove ads | $7.99 | one-time |

**What reviewers like**

- 🔍 Accurate measurements
- 📐 Useful for home projects
- 🔍 Precise for smaller objects
- 🔍 Helpful for architects

**What reviewers complain about**

- 💰 Expensive subscription model
- 🐛 Buggy and crashes frequently
- 📢 Aggressive advertising
- 🔍 Inaccurate for larger spaces
- 📚 Poor documentation and instructions

**Reported bugs**

- Freezes on launch
- Measurement errors
- Incompatibility with newer devices

**Requested features**

- Free trial version
- One-time purchase option
- Improved accuracy for larger areas


## Frequently asked questions

### Is Angle Gradient Inclinometer free?

Angle Gradient Inclinometer is free to download, with no in-app purchases.

### Is AR Ruler free?

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

### Which has better reviews, Angle Gradient Inclinometer or AR Ruler?

AR Ruler is rated higher. Angle Gradient Inclinometer averages 4.3 out of 5 from 314 ratings, while AR Ruler averages 4.6 from 975 ratings.

### Do Angle Gradient Inclinometer or AR Ruler have ads?

Both Angle Gradient Inclinometer and AR Ruler show ads.

### Which is updated more often, Angle Gradient Inclinometer or AR Ruler?

Angle Gradient Inclinometer ships an update every 8 months, and AR Ruler every 3 weeks. Most recently, Angle Gradient Inclinometer was updated on October 26, 2026 and AR Ruler on October 27, 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.*