# Aquarium Fish ID by Photo — Name the fish in your tank.

> Name the fish in your tank. (iPhone/iPad app by AKIHIRO MATSUYAMA.)

- Source: https://appshunter.io/ios/app/aquarium-fish-id-by-photo/id6806598298 (this page in markdown: same URL + `.md`)
- Developer: [AKIHIRO MATSUYAMA](https://appshunter.io/developer/6789115438)
- Category: Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 48 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, European Portuguese, Chinese (Simplified, China), European Spanish, Vietnamese
- Released: 2026-09-01
- Data updated: 2026-09-20
- User reviews in markdown: https://appshunter.io/ios/app/aquarium-fish-id-by-photo/id6806598298/reviews.md

## What is Aquarium Fish ID by Photo?

That fish drifting past the glass — do you know its name? Take one photo and the answer is worked out inside your phone. Your photos and your records never leave this device, and nothing is sent to a server to make the identification.

It knows ten kinds, and only ten
Arowana, angelfish, goldfish, guppy, corydoras, discus, neon tetra, pleco, betta and medaka (Japanese rice fish).
Photograph a fish outside that list and it will not force the picture onto the nearest name. When it cannot tell, it says so: "I could not tell." The full list is inside the app, readable before you take a single photo.

Honest beats certain
It offers up to three candidates and never commits to one. Each candidate carries how sure the AI actually is, in three plain steps: a close match, a match, possibly a match. Below that, no candidate is offered at all. Feed it the same photo twice and the answer does not wobble.

A guide to read, not just a button to press
Each of the ten has its own written entry: what to look at, how it lives, small facts worth knowing, and what to watch for when you observe it. Sources are given (Wikipedia, Japanese and English editions). There is plenty to read on a day you never open the camera.

How far the free version goes, in numbers
- AI identification: no limit at all for the first 7 days after you install it; 3 times a day from day 8.
- Today's quiz: 3 questions a day.
- Your observation records: all of them, free, and they stay that way. Nothing gets hidden or taken back later.
- All ten field guide entries: free.

What the one-time purchase opens
The daily limits on identification and quizzes disappear, and you gain three things: the map of where you found them, CSV export of your records, and the "photography tips and observation hints" guide. No monthly fee. No auto-renewal. No ads and no account to create. You pay once. "Restore purchase" carries it to a new phone.

About the training photographs
The AI learned only from photographs released under CC0, CC BY, or into the public domain. Images carrying share-alike terms such as CC BY-SA were deliberately left out. The photographers are credited in the app's settings screen.

What this app will not do
It cannot advise you on keeping fish, on a fish that seems unwell, or on looking after the tank. For those, please ask someone who knows the subject properly.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 撮りかたのコツ・記録のヒント | $1.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-09-17

• Improved how AI confidence results are shown
• Improved startup stability
• Fixed minor bugs

### 1.0.1 — 2026-09-04

• Minor display and stability improvements

### 1.0 — 2026-09-01

No release notes.

## More apps by AKIHIRO MATSUYAMA

- [Photo Calorie Log: Pashameshi](https://appshunter.io/ios/app/photo-calorie-log-pashameshi/id6789115436)
- [Fishing Log & Tide Times](https://appshunter.io/ios/app/fishing-log-and-tide-times/id6789152736)
- [Oshi Ticket Planner: Oshichike](https://appshunter.io/ios/app/oshi-ticket-planner-oshichike/id6789172055)
- [目利きカメラ せどり・物販の利益計算](https://appshunter.io/ios/app/id6789199082)
- [AI英会話 にゃんと｜話す練習・初心者・文法チェック](https://appshunter.io/ios/app/ai/id6789363105)
- [AI韓国語 にゃんと｜推し活・ハングル・初心者から](https://appshunter.io/ios/app/ai/id6789367043)

All apps by AKIHIRO MATSUYAMA: https://appshunter.io/developer/6789115438

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-20.*