# AquariumNotes vs Fish Disease Identifier

The clearest difference is ads: Fish Disease Identifier at none against AquariumNotes's shown. Fish Disease Identifier also leads on update cadence (weekly vs monthly) and iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. AquariumNotes sells 3 in-app purchases, starting at $2.99 per month and Fish Disease Identifier sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

AquariumNotes ships an update monthly, Fish Disease Identifier weekly. The most recent releases landed on September 23, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | AquariumNotes | Fish Disease Identifier |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Size | 7 MB | 40 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Yusuke Morimoto](https://appshunter.io/developer/1702989537) | [Szymon Niemiec](https://appshunter.io/developer/1853026562) |

## What reviewers say

### AquariumNotes

[App page](https://appshunter.io/ios/app/aquariumnotes/id6480376453)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PremiumMember/1Month | $2.99 | per month |
| PremiumMember/6Month | $9.99 | per 6 months |
| PremiumMember/1Year | $19.99 | per year |


### Fish Disease Identifier

[App page](https://appshunter.io/ios/app/fish-disease-identifier/id6761323697)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per 7 days |
| Premium | $29.99 | per year |


## Frequently asked questions

### Is AquariumNotes free?

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

### Is Fish Disease Identifier free?

Fish Disease Identifier is free to download, with in-app purchases available.

### Do AquariumNotes or Fish Disease Identifier have ads?

AquariumNotes shows ads; Fish Disease Identifier does not.

### Which is updated more often, AquariumNotes or Fish Disease Identifier?

AquariumNotes ships an update monthly, and Fish Disease Identifier weekly. Most recently, AquariumNotes was updated on September 23, 2026 and Fish Disease Identifier on August 22, 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.*