# AquaSense.fish vs TankDiary

The clearest difference is rating: TankDiary at 5.0 against AquaSense.fish's 4.3. AquaSense.fish's advantage is in-app purchases (none vs 2) and update cadence (every 5 days vs every 11 days). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. TankDiary sells 2 in-app purchases, starting at $9.99 per year. AquaSense.fish asks for nothing beyond the download.

TankDiary holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

AquaSense.fish ships an update every 5 days, TankDiary every 11 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | AquaSense.fish | TankDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/aquasensefish/id6777320311/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 11 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 54 MB | 2 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [BRYCE SCOTT SMITH](https://appshunter.io/developer/6777320313) | [TOBY M BERGER](https://appshunter.io/developer/6776950197) |

## What reviewers say

### AquaSense.fish

[App page](https://appshunter.io/ios/app/aquasensefish/id6777320311)

This app helps you maintain healthy aquariums by monitoring water parameters, identifying fish from photos, and providing compatibility information. It offers tools for planning tank setups, tracking livestock, and logging maintenance, with AI-powered guidance for both freshwater and saltwater tanks.

**Highlights:** Water parameter monitoring (pH, ammonia, etc.), Photo-based fish identification, Livestock compatibility checker, Species library with care requirements, Tank build planning tool, Maintenance logging and reminders, AI-powered care guidance

**Features:** macOS Compatibility

**In-app purchases:** none


### TankDiary

[App page](https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172)

Easily track aquarium water parameters, schedule maintenance, and monitor your tank's health. This app helps you understand your tank's cycling stage and provides reliable reminders for water changes and other tasks. It offers detailed logging and historical charts for long-term trend analysis.

**Highlights:** Log water test results (ammonia, nitrite, nitrate, pH, etc.), Identify aquarium cycle stage, Schedule maintenance reminders (water changes, dosing), Water change calculator, Livestock and photo journal, Offline functionality, Interactive historical charts

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TankDiary Pro — Yearly | $9.99 | per year |
| TankDiary Pro — Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is AquaSense.fish free?

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

### Is TankDiary free?

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

### Which has better reviews, AquaSense.fish or TankDiary?

TankDiary is rated higher. AquaSense.fish averages 4.3 out of 5 from 3 ratings, while TankDiary averages 5.0 from 2 ratings.

### Do AquaSense.fish or TankDiary have ads?

Neither AquaSense.fish nor TankDiary shows ads.

### Which is updated more often, AquaSense.fish or TankDiary?

AquaSense.fish ships an update every 5 days, and TankDiary every 11 days. Most recently, AquaSense.fish was updated on October 31, 2026 and TankDiary on October 31, 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.*