# ARuler vs SWM | Pool & Spa

The clearest difference is in-app purchases: SWM | Pool & Spa at none against ARuler's 1. SWM | Pool & Spa also leads on update cadence (every 4 days vs every 3 months). ARuler's advantage is iOS requirement (11.0 vs 15.6). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. ARuler sells 1 one-off in-app purchase. SWM | Pool & Spa asks for nothing beyond the download.

ARuler ships an update every 3 months, SWM | Pool & Spa every 4 days. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ARuler | SWM | Pool & Spa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/aruler/id1290158408/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 47 MB | 43 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [思远 伍](https://appshunter.io/developer/1128300278) | [iot flowers](https://appshunter.io/developer/1850785990) |

## 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 |


### SWM | Pool & Spa

[App page](https://appshunter.io/ios/app/swm-pool-and-spa/id1537308493)

This application provides real-time control and management for pools, spas, and other connected environments. It analyzes water, air, and soil parameters, allowing you to manage up to 15 devices remotely. Enjoy secure, encrypted data transfers for efficient and reliable operation.

**Highlights:** Real-time control, Analyze water, air, and soil parameters, Control up to 15 connected devices, Secure encrypted data transfers, Remote access from anywhere, Pool and spa automation

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

**In-app purchases:** none


## Frequently asked questions

### Is ARuler free?

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

### Is SWM | Pool & Spa free?

SWM | Pool & Spa is free to download, with no in-app purchases.

### Do ARuler or SWM | Pool & Spa have ads?

Neither ARuler nor SWM | Pool & Spa shows ads.

### Which is updated more often, ARuler or SWM | Pool & Spa?

ARuler ships an update every 3 months, and SWM | Pool & Spa every 4 days. Most recently, ARuler was updated on October 7, 2026 and SWM | Pool & Spa on October 24, 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.*