# Aquarist's Notes vs AquaSense.fish

The clearest difference is in-app purchases: AquaSense.fish at none against Aquarist's Notes's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Aquarist's Notes sells 2 in-app purchases, starting at $1.99 per month. AquaSense.fish asks for nothing beyond the download.

Aquarist's Notes ships an update every 6 days, AquaSense.fish every 5 days. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Aquarist's Notes | AquaSense.fish |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/aquasensefish/id6777320311/reviews)** |
| Number of ratings | — | **2** |
| 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 | 16 MB | 54 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ludek Slouf](https://appshunter.io/developer/1664390856) | [BRYCE SCOTT SMITH](https://appshunter.io/developer/6777320313) |

## What reviewers say

### Aquarist's Notes

[App page](https://appshunter.io/ios/app/aquarists-notes/id6451252680)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $1.99 | per month |
| Annual subscription | $9.99 | per year |


### 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 Aquarist's Notes free?

Aquarist's Notes 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 Aquarist's Notes or AquaSense.fish have ads?

Neither Aquarist's Notes nor AquaSense.fish shows ads.

### Which is updated more often, Aquarist's Notes or AquaSense.fish?

Aquarist's Notes ships an update every 6 days, and AquaSense.fish every 5 days. Most recently, Aquarist's Notes was updated on September 30, 2026 and AquaSense.fish on October 11, 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.*