# TankDiary vs AquaSense.fish

The clearest difference is in-app purchases: AquaSense.fish at none against TankDiary's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. TankDiary sells 1 one-off in-app purchase. AquaSense.fish asks for nothing beyond the download.

TankDiary ships an update every 6 days, AquaSense.fish every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | TankDiary | AquaSense.fish |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/aquasensefish/id6777320311/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 55 MB | 54 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [kazuki korenori](https://appshunter.io/developer/1884835388) | [BRYCE SCOTT SMITH](https://appshunter.io/developer/6777320313) |

## What reviewers say

### TankDiary

[App page](https://appshunter.io/ios/app/tankdiary/id6762593557)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TankDiary Pro | $5.99 | one-time |


### 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


## Frequently asked questions

### Is TankDiary free?

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

### Is AquaSense.fish free?

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

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

Neither TankDiary nor AquaSense.fish shows ads.

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

TankDiary ships an update every 6 days, and AquaSense.fish every 5 days. Most recently, TankDiary was updated on October 24, 2026 and AquaSense.fish on October 24, 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.*