# Fish Harmony vs Aquatrak

The clearest difference is rating: Aquatrak at 4.4 against Fish Harmony's 3.4. Aquatrak also leads on update cadence (every 2 months vs every 9 months). Fish Harmony's advantage is iOS requirement (12.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Aquatrak holds the better App Store score, 4.4 against 3.4. Both are backed by a comparable volume of ratings — 10 and 5 respectively.

Fish Harmony ships an update every 9 months, Aquatrak every 2 months. The most recent releases landed on October 13, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Fish Harmony | Aquatrak |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (10 ratings)](https://appshunter.io/ios/app/fish-harmony/id1309770017/reviews) | **[4.4 (5 ratings)](https://appshunter.io/ios/app/aquatrak/id6444168241/reviews)** |
| Number of ratings | **10** | 5 |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 33 MB | 37 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pat Canella](https://appshunter.io/developer/1309770016) | [Nika Magradze](https://appshunter.io/developer/1652791879) |

## What reviewers say

### Fish Harmony

[App page](https://appshunter.io/ios/app/fish-harmony/id1309770017)

This app provides comprehensive compatibility data for various aquarium fish species, helping you determine if they will coexist peacefully. It also offers reef safety information for saltwater fish to protect your coral. Users can perform direct comparisons between two fish species.

**Highlights:** Fish compatibility data, Reef safe ratings, Freshwater and saltwater modes, Fish-to-fish comparison, Compatibility warnings

**Features:** macOS Compatibility

**In-app purchases:** none


### Aquatrak

[App page](https://appshunter.io/ios/app/aquatrak/id6444168241)

This app helps users manage and learn about aquariums. It features a species library, educational guides, and tools to track water parameters and manage aquarium tasks. It aims to support both beginner and experienced fishkeepers.

**Highlights:** Comprehensive species library, In-depth educational guides, Water parameter tracking, Personalized aquarium profiles, Task manager for maintenance, User account management

**In-app purchases:** none


## Frequently asked questions

### Is Fish Harmony free?

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

### Is Aquatrak free?

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

### Which has better reviews, Fish Harmony or Aquatrak?

Aquatrak is rated higher. Fish Harmony averages 3.4 out of 5 from 10 ratings, while Aquatrak averages 4.4 from 5 ratings.

### Do Fish Harmony or Aquatrak have ads?

Neither Fish Harmony nor Aquatrak shows ads.

### Which is updated more often, Fish Harmony or Aquatrak?

Fish Harmony ships an update every 9 months, and Aquatrak every 2 months. Most recently, Fish Harmony was updated on October 13, 2026 and Aquatrak on October 20, 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.*