# Master Clear Salt System vs Smart Drainage System Control

The clearest difference is update cadence: Smart Drainage System Control at every 5 days against Master Clear Salt System's every 3 weeks. On price, ads, in-app purchases and monetization model there is nothing between them.

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

Master Clear Salt System ships an update every 3 weeks, Smart Drainage System Control every 5 days. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Master Clear Salt System | Smart Drainage System Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smart-drainage-system-control/id6752671573/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free | Free |
| Size | 62 MB | 37 MB |
| Requires iOS | **15.0** | 15.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Master Spas](https://appshunter.io/developer/574204539) | [Agri Drain](https://appshunter.io/developer/1783382657) |

## What reviewers say

### 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


### Smart Drainage System Control

[App page](https://appshunter.io/ios/app/smart-drainage-system-control/id6752671573)

Manage farm water systems for increased profitability and environmental protection. Optimize drainage, sub-irrigation, and conservation practices to improve water quality, boost yields, and reduce soil erosion.

**Highlights:** Water management optimization, Drainage water management, Sub-irrigation, Conservation practices, Improved water quality, Increased farm profitability

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Master Clear Salt System free?

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

### Is Smart Drainage System Control free?

Smart Drainage System Control is free to download, with no in-app purchases.

### Do Master Clear Salt System or Smart Drainage System Control have ads?

Neither Master Clear Salt System nor Smart Drainage System Control shows ads.

### Which is updated more often, Master Clear Salt System or Smart Drainage System Control?

Master Clear Salt System ships an update every 3 weeks, and Smart Drainage System Control every 5 days. Most recently, Master Clear Salt System was updated on October 14, 2026 and Smart Drainage System Control on October 13, 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.*