# KoiControl vs Starcool

The clearest difference is in-app purchases: Starcool at none against KoiControl's 5. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. KoiControl sells 5 in-app purchases, starting at $11.99 per year. Starcool asks for nothing beyond the download.

KoiControl ships an update every 3 weeks, Starcool every 6 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | KoiControl | Starcool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (11 ratings)](https://appshunter.io/ios/app/koicontrol-the-koi-app/id1558517332/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 87.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 85 MB | 47 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Make IT Simple GmbH](https://appshunter.io/developer/1820364433) | [ASURE GROUP PTE LTD](https://appshunter.io/developer/1606327920) |

## What reviewers say

### KoiControl

[App page](https://appshunter.io/ios/app/koicontrol-the-koi-app/id1558517332)

Digitally manage your koi population and pond water quality. Track fish growth, calculate optimal feeding amounts, and monitor water parameters with automated analysis and suggestions.  View trends with generated charts and manage multiple ponds.

**Highlights:** Water parameter tracking and analysis, Koi profile creation and growth history, Automated food calculator, Trend analysis with charts, Multiple pond management, Offline functionality

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KoiControl premium version | $11.99 | per year |
| Koi Dealer Bronze | $14.99 | per month |
| KoiControl premium version | $17.99 | per year |
| Koi Dealer Silver | $17.99 | per month |
| Koi Dealer Gold | $24.99 | per month |


### Starcool

[App page](https://appshunter.io/ios/app/starcool/id6452590021)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is KoiControl free?

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

### Is Starcool free?

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

### Do KoiControl or Starcool have ads?

Neither KoiControl nor Starcool shows ads.

### Which is updated more often, KoiControl or Starcool?

KoiControl ships an update every 3 weeks, and Starcool every 6 weeks. Most recently, KoiControl was updated on October 24, 2026 and Starcool on October 27, 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.*