# ARuler vs Smart Aqua

The clearest difference is in-app purchases: Smart Aqua at none against ARuler's 1. Smart Aqua also leads on update cadence (monthly vs every 3 months). ARuler's advantage is iOS requirement (11.0 vs 13.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. ARuler sells 1 one-off in-app purchase. Smart Aqua asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 1.0 for ARuler against 1.0 for Smart Aqua. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

ARuler ships an update every 3 months, Smart Aqua monthly. The most recent releases landed on September 20, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | ARuler | Smart Aqua |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/aruler/id1290158408/reviews) | [1.0 (1 ratings)](https://appshunter.io/ios/app/smart-aqua/id6449386967/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 47 MB | 34 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [思远 伍](https://appshunter.io/developer/1128300278) | [Shenzhen Kinwayn Tech Co., Ltd.](https://appshunter.io/developer/1688849456) |

## What reviewers say

### ARuler

[App page](https://appshunter.io/ios/app/aruler/id1290158408)

This utility app provides a convenient measuring tool directly on your smartphone. It allows for accurate measurements of objects without any extra hardware, and you can save and share your results.

**Highlights:** Accurate measurements, No additional hardware required, Save measurements, Share measurements

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version | $0.99 | one-time |


### Smart Aqua

[App page](https://appshunter.io/ios/app/smart-aqua/id6449386967)

Control your aquarium products with this app. Features include product connectivity, customizable sunrise and sunset lighting, and personalized lighting programs to enhance your aquatic environment.

**Highlights:** Product connectivity, Sunrise and sunset control, Customized lighting programs, Aquarium product management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ARuler free?

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

### Is Smart Aqua free?

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

### Which has better reviews, ARuler or Smart Aqua?

ARuler and Smart Aqua are both rated 1.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do ARuler or Smart Aqua have ads?

Neither ARuler nor Smart Aqua shows ads.

### Which is updated more often, ARuler or Smart Aqua?

ARuler ships an update every 3 months, and Smart Aqua monthly. Most recently, ARuler was updated on September 20, 2026 and Smart Aqua on September 23, 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.*