# Ruler ++ vs Smart Level & AR Ruler

The clearest difference is review sentiment: Smart Level & AR Ruler at 83% against Ruler ++'s 15%. Smart Level & AR Ruler also leads on rating (4.7 vs 3.5) and update cadence (every 2 weeks vs every 5 months). Ruler ++'s advantage is iOS requirement (8.0 vs 15.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Ruler ++ sells 1 one-off in-app purchase and Smart Level & AR Ruler sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Smart Level & AR Ruler holds the better App Store score, 4.7 against 3.5. Both are backed by a comparable volume of ratings — 954 and 485 respectively. Written reviews point the same way: 15% of Ruler ++'s written reviews are positive against 83% of Smart Level & AR Ruler's.

Ruler ++ ships an update every 5 months, Smart Level & AR Ruler every 2 weeks. The most recent releases landed on November 10, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Ruler ++ | Smart Level & AR Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (954 ratings)](https://appshunter.io/ios/app/ruler-plus-plus/id381682088/reviews) | **[4.7 (485 ratings)](https://appshunter.io/ios/app/smart-level-and-ar-ruler/id6698865336/reviews)** |
| Number of ratings | **954** | 485 |
| Positive reviews | 14.9% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 43 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Fapps World et Cie S.E.C.S.](https://appshunter.io/developer/881437066) | [卓 张](https://appshunter.io/developer/1765233606) |

## What reviewers say

### Ruler ++

[App page](https://appshunter.io/ios/app/ruler-plus-plus/id381682088)

This app allows you to measure lengths accurately in both inches and centimeters. It provides a simple and straightforward tool for quick measurements.

**Highlights:** Measure in inches, Measure in centimeters, Accurate length measurement, Simple interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advertisement-free upgrade | $0.99 | one-time |

**What reviewers like**

- 👍 Simple and quick to use
- 👍 Includes both metric and Imperial measures
- 🚀 Great for wanting to measure displayed length

**What reviewers complain about**

- 🐛 Measurements are not accurate
- 🐛 Ruler not matching real-world measurements
- 🐛 Ruler not scaling properly on different devices
- 🔋 Ads make it impossible to use
- 🔋 Constant, intrusive ads

**Reported bugs**

- Ruler markings are incorrect
- Ruler not displaying full length on screen
- Incompatible with newer iPhone models

**Requested features**

- Add ability to calibrate ruler for different devices
- Improve accuracy of measurements
- Reduce or remove ads


### Smart Level & AR Ruler

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

Transform your iPhone into a versatile digital toolbox with advanced AR and AI. Measure length, area, height, and distance with precision, or utilize tools like a protractor, level, and unit converter. This app offers a comprehensive suite of utilities for various tasks.

**Highlights:** Length, Area, Height, Distance Measurement, Protractor and Unit Conversion, Level and Light Sensor, Scientific Calculator, Magnifying Glass and Compass, Flashlight

**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 Ruler ++ free?

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

### Is Smart Level & AR Ruler free?

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

### Which has better reviews, Ruler ++ or Smart Level & AR Ruler?

Smart Level & AR Ruler is rated higher. Ruler ++ averages 3.5 out of 5 from 954 ratings, while Smart Level & AR Ruler averages 4.7 from 485 ratings.

### Do Ruler ++ or Smart Level & AR Ruler have ads?

Neither Ruler ++ nor Smart Level & AR Ruler shows ads.

### Which is updated more often, Ruler ++ or Smart Level & AR Ruler?

Ruler ++ ships an update every 5 months, and Smart Level & AR Ruler every 2 weeks. Most recently, Ruler ++ was updated on November 10, 2026 and Smart Level & AR Ruler on November 8, 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.*