# Angle Gradient Inclinometer vs Smart Level & AR Ruler

The clearest difference is in-app purchases: Angle Gradient Inclinometer at none against Smart Level & AR Ruler's 4. Angle Gradient Inclinometer also leads on iOS requirement (13 vs 15.6). Smart Level & AR Ruler's advantage is ads (none vs shown) and review sentiment (83% vs 51%). On price, ratings volume and device support there is nothing between them.

Both are free to download. Smart Level & AR Ruler sells 4 in-app purchases, starting at $4.99 per 7 days. Angle Gradient Inclinometer asks for nothing beyond the download.

Smart Level & AR Ruler holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 295 and 484 respectively. Written reviews point the same way: 51% of Angle Gradient Inclinometer's written reviews are positive against 83% of Smart Level & AR Ruler's.

Angle Gradient Inclinometer ships an update every 8 months, Smart Level & AR Ruler every 2 weeks. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Angle Gradient Inclinometer | Smart Level & AR Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (295 ratings)](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112/reviews) | **[4.7 (484 ratings)](https://appshunter.io/ios/app/smart-level-and-ar-ruler/id6698865336/reviews)** |
| Number of ratings | 295 | **484** |
| Positive reviews | 51.1% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 11 MB | 42 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [卓 张](https://appshunter.io/developer/1765233606) |

## 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


### Smart Level & AR Ruler

[App page](https://appshunter.io/ios/app/smart-level-and-ar-ruler/id6698865336)

This app transforms your iPhone into a versatile digital toolbox. It offers a wide array of measurement and utility tools, utilizing advanced AI and computer vision for precise results.  From measuring lengths and areas to using a protractor and level, it helps you tackle various tasks.

**Highlights:** Length, area, height, distance measurement, Protractor and unit conversion, Level and light sensor, Decibel meter, Scientific calculator, Magnifying glass and compass

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| VIP - Week | $9.99 | per 7 days |
| Monthly Subscription | $19.99 | per month |
| VIP - Year | $69.99 | per year |


## Frequently asked questions

### Is Angle Gradient Inclinometer free?

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

### Is Smart Level & AR Ruler free?

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

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

Smart Level & AR Ruler is rated higher. Angle Gradient Inclinometer averages 4.4 out of 5 from 295 ratings, while Smart Level & AR Ruler averages 4.7 from 484 ratings.

### Do Angle Gradient Inclinometer or Smart Level & AR Ruler have ads?

Angle Gradient Inclinometer shows ads; Smart Level & AR Ruler does not.

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

Angle Gradient Inclinometer ships an update every 8 months, and Smart Level & AR Ruler every 2 weeks. Most recently, Angle Gradient Inclinometer was updated on October 14, 2026 and Smart Level & AR Ruler on October 9, 2026.

---

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