# KoiKnife — Koi ID, History, Prices & Care

> Koi ID, History, Prices & Care (iPhone/iPad app by LIBCSYSTEMS LLC.)

- Source: https://appshunter.io/ios/app/koiknife/id6822839703 (this page in markdown: same URL + `.md`)
- Developer: [LIBCSYSTEMS LLC](https://appshunter.io/developer/6808884435)
- Category: Reference, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 29 MB
- Languages: American English
- Released: 2026-10-21
- Data updated: 2026-10-28

## What is KoiKnife?

KoiKnife is the Swiss Army Knife of koi knowledge: everything a koi keeper, buyer or admirer needs, in one beautifully illustrated app. Presented with B&M Aquatics of Hamburg, New Jersey, family owned since 2003.

IDENTIFY
• 33 koi varieties, from the Gosanke (Kohaku, Taisho Sanke, Showa) to Asagi, Shusui, Ogon, Kujaku, Chagoi, Ochiba, Goromo, Tancho, Doitsu, Ginrin and butterfly koi
• Large photographs, kanji names, colour swatches and rarity
• "Often confused with" links that teach the real differences
• Search and filter by variety group
• Save favourites to My Koi

PRICES
• Price bands from Pond grade and Hobbyist to Japanese import, Breeder-attributed and Show quality, at every size
• A size calculator: price grows with the square of length
• Why two koi the same size cost wildly different money

HISTORY
• Ten researched chapters on the real story of nishikigoi, from Chinese paddy carp and Niigata's snow country to the 1914 Tokyo exposition, the ¥203 million S Legend and the 2004 earthquake
• Myths busted, facts sourced
• A gallery of woodblock prints by Hokusai, Hiroshige, Kuniyoshi and more

POND CARE & SUPPLIES
• Feeding by water temperature (°F / °C)
• The pond year, season by season
• Water tests explained: ammonia, nitrite, nitrate, pH, KH
• The gear every pond needs, with practical tips
• Pond FAQ: green water, winter, UV, stocking

EXTRAS
• Name That Koi: a photo quiz where the wrong answers are the real lookalikes
• Koi of the Day
• A living koi pond to feed and play with

No account, no ads, no tracking. Everything works offline.

## Is KoiKnife safe?

Not enough ratings yet to assess KoiKnife.

## Is KoiKnife legit?

KoiKnife has limited verification signals. The AppsHunter Legitimacy Score for KoiKnife is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.1 — 2026-10-27

No release notes.

## More apps by LIBCSYSTEMS LLC

- [JellyDazzle](https://appshunter.io/ios/app/jellydazzle/id6808884433)

All apps by LIBCSYSTEMS LLC: https://appshunter.io/developer/6808884435

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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 2026-10-28.*