# SEASLUG.WORLD — Nudibranch ID & Field Guide

> Nudibranch ID & Field Guide (iPhone/iPad app by NOBUHIKO KIMOTO.)

- Source: https://appshunter.io/ios/app/seaslugworld/id6785337563 (this page in markdown: same URL + `.md`)
- Developer: [NOBUHIKO KIMOTO](https://appshunter.io/developer/6785337565)
- Category: Education, Books
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 16 MB
- Languages: Japanese
- Released: 2026-07-12
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/seaslugworld/id6785337563/reviews.md

## What is SEASLUG.WORLD?

Found a sea slug on a dive and came home without knowing what it was?

Sea Slugs of the World is the official app of seaslug.world, a community-built field guide grown from the contributions of 630 divers, snorkelers and researchers. It covers more than 2,200 species and over 50,000 photographs.

■ A guide you search by sight
Search by scientific or Japanese common name, or narrow down by colour, the region where it was observed, and taxonomy (family and genus). Even when you have no name to go on, you can get there from what the animal looked like.

■ AI identification
Pick a photo and the AI proposes candidate species with similarity scores. Straight after the dive, while it is still fresh. Tap a candidate to open its full entry in the guide.

■ Works offline
Save the guide data and cover photographs to your device and it keeps working on the dive boat, on a remote island, in airplane mode.

■ Updated daily
New species descriptions, digests of recent papers, and photographs the community posted today.

Premium membership (JPY 500 / month, auto-renewing)
- Save the entire guide offline
- Unlimited AI identification (the free tier has a usage limit)
- Unlimited access to members-only articles
- No ads

Payment is charged to your Apple Account. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the period. Manage or cancel it in iOS Settings > Apple Account > Subscriptions.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://seaslug.world/blog/privacypolicy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Membership | $4.99 | per month |



## Version history (last 4 releases)

### 1.1.2 — 2026-08-21

minor change

### 1.1.1 — 2026-07-17

軽微な不具合の修正

### 1.1 — 2026-07-15

・プッシュ通知に対応しました。新着ブログ記事などをお知らせします
・不具合の修正と安定性の改善

### 1.0 — 2026-07-12

No release notes.

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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 2026-08-22.*