# Kactoily vs Koi Worth

The clearest difference is rating: Koi Worth at 5.0 against Kactoily's 2.5. Kactoily's advantage is in-app purchases (none vs 3) and update cadence (every 2 weeks vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Koi Worth sells 3 in-app purchases, starting at $6.99 per month. Kactoily asks for nothing beyond the download.

Koi Worth holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: Kactoily has 11 ratings behind it against 1, so its average is the more settled of the two.

Kactoily ships an update every 2 weeks, Koi Worth every 5 weeks. The most recent releases landed on October 30, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Kactoily | Koi Worth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (11 ratings)](https://appshunter.io/ios/app/kactoily/id6744716298/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/koi-worth/id6758781822/reviews)** |
| Number of ratings | **11** | 1 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 62 MB | 12 MB |
| Requires iOS | 13 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [彦浩 宋](https://appshunter.io/developer/1808803601) | [Scott Hause](https://appshunter.io/developer/1521582010) |

## What reviewers say

### Kactoily

[App page](https://appshunter.io/ios/app/kactoily/id6744716298)

This application monitors water quality for pools, aquariums, and other water bodies. It helps users track essential parameters to maintain healthy water conditions.

**Highlights:** Pool monitoring, Water quality tracking, Aquarium monitoring, Parameter analysis

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

**In-app purchases:** none


### Koi Worth

[App page](https://appshunter.io/ios/app/koi-worth/id6758781822)

This app uses AI to analyze and grade koi fish from photos, providing insights into their body shape, color, pattern, and growth potential. It also estimates market value, identifies potential investments, and helps users track their koi collections.

**Highlights:** AI koi grading (body shape, color, pattern, growth), Real market value estimates, 5K Sleeper analysis for investment potential, Dealer price insights, Compare multiple koi, Track koi collection and development, Development forecasts

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hobby Plan | $6.99 | per month |
| Collector Plan | $14.99 | per month |
| MASTER | $29.99 | per month |


## Frequently asked questions

### Is Kactoily free?

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

### Is Koi Worth free?

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

### Which has better reviews, Kactoily or Koi Worth?

Koi Worth is rated higher. Kactoily averages 2.5 out of 5 from 11 ratings, while Koi Worth averages 5.0 from 1 ratings.

### Do Kactoily or Koi Worth have ads?

Neither Kactoily nor Koi Worth shows ads.

### Which is updated more often, Kactoily or Koi Worth?

Kactoily ships an update every 2 weeks, and Koi Worth every 5 weeks. Most recently, Kactoily was updated on October 30, 2026 and Koi Worth on September 16, 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.*