KoiLog
Koi Growth & Pond Water Log
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
For keepers of living treasures — record each koi's growth, health, and your pond's water, quietly.
Record each koi's growth as a living asset — a keeping journal for serious nishikigoi keepers.
■ Koi detail (the hero)
Open a koi and its whole history rises like a hanging scroll: overhead photos and a length growth curve by year, body / skin / pattern ratings, and acquisition date, price and bloodline.
■ Health & treatment log
Record symptoms, treatment, dose, quarantine and outcome — so you can look back on the whole course when it matters.
■ Pond water
Log temperature, pH, KH, GH, ammonia, nitrite, nitrate and salt, with a calm warning when a reading is out of range.
■ PDF / CSV export
For a show entry, or to hand to the next keeper. Your records are always yours.
• Fully offline — data stays on your device
• No ads
• For recording and visualising only (not medical advice).
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KoiLog Pro — auto-renewable subscription
KoiLog Pro unlocks the full app (no limits on koi, health logs and export). Monthly and yearly plans are available; the current price is shown in the app before you confirm. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. You can manage or cancel your subscription anytime in your Apple Account settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://abolabo.com/privacy-koilog.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, ABOLAB SOFTWARE DEVELOPMENT OFFICE, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ABOLAB SOFTWARE DEVELOPMENT OFFICE
- Size
- 57.5 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- KoiLog Pro (Monthly) $4.99
- KoiLog Pro (Yearly) $34.99
- Copyright
- © 2026 Abolabo