# Arrow Propane vs Master Clear Salt System

The clearest difference is update cadence: Master Clear Salt System at every 3 weeks against Arrow Propane's every 4 months. Arrow Propane's advantage is iOS requirement (12.2 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Arrow Propane ships an update every 4 months, Master Clear Salt System every 3 weeks. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Arrow Propane | Master Clear Salt System |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 57 MB | 62 MB |
| Requires iOS | **12.2** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) | [Master Spas](https://appshunter.io/developer/574204539) |

## What reviewers say

### Arrow Propane

[App page](https://appshunter.io/ios/app/arrow-propane/id1639403080)

**Features:** macOS Compatibility

**In-app purchases:** none


### Master Clear Salt System

[App page](https://appshunter.io/ios/app/master-clear-salt-system/id6738960674)

Monitor and control your spa's water chemistry remotely. Adjust settings, check salt levels, and manage chlorine cycles to ensure optimal water quality with minimal effort.

**Highlights:** Monitor salt level, Adjust chlorine sensor sensitivity, Manually override chlorine cycle, Check Smart Cell life, Remote control and monitoring

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

**In-app purchases:** none


## Frequently asked questions

### Is Arrow Propane free?

Arrow Propane is free to download, with no in-app purchases.

### Is Master Clear Salt System free?

Master Clear Salt System is free to download, with no in-app purchases.

### Do Arrow Propane or Master Clear Salt System have ads?

Neither Arrow Propane nor Master Clear Salt System shows ads.

### Which is updated more often, Arrow Propane or Master Clear Salt System?

Arrow Propane ships an update every 4 months, and Master Clear Salt System every 3 weeks. Most recently, Arrow Propane was updated on October 4, 2026 and Master Clear Salt System on October 14, 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.*