KoiApp is the complete app for koi keepers and breeders — track every
fish, care for your pond, and control it all from your phone. Part of
the KoiSoft system.

TRACK YOUR FISH
• Register every koi with photos, variety, length, weight and history
• Follow growth over time with clear charts, and compare fish in a pond
• Measure a fish straight from a photo — mark a known reference and get
exact length
• Scan a fish with AI to identify species and variety and estimate size
• Turn a phone photo into a polished studio ID card with its own QR code
• Build a family tree with parents and offspring

KOIDOCTOR — YOUR AI ADVISOR
• Ask about health, symptoms, water chemistry, feeding and seasonal care
• Attach a photo and get an answer about your own fish
• Log a water test and have KoiDoctor read it: it weighs pH against KH,
nitrite against temperature and stocking, and tells you what the
situation actually is
• Find fish vets near you
• Guidance, not a replacement for a vet — in an acute case, call one

WATER TESTS AND POND CARE
• Log temperature, pH, ammonia, nitrite, nitrate, KH and GH in under a
minute
• Every reading is colour-coded as you type, and you can photograph the
test strip as documentation
• See each value charted over time so you can tell where the pond is
heading
• Feeding plans that follow water temperature, fish size and food type
• Pond overview with live status

CONTROL YOUR POND WITH KOIBOX (optional hardware)
• Monitor and automate: pump, UV, heating, lights and feeding
• Water level with automatic top-up, and live water temperature
• Energy control that follows the electricity price
• Push alerts on critical events, wherever you are
• KoiPlugg smart plug for equipment you would rather not hard-wire

BREEDING
• KoiMix weighs a pairing: likely offspring varieties, which of your
fish to breed from, and why
• Generate an image of the expected offspring

KOI MARKETPLACE
• Browse koi for sale and reach the seller directly
• List your own koi and share your personal storefront
• Transfer a koi to its new owner with the full history — photos,
measurements, logs and water tests

Available in English, Norwegian, German, Dutch and Japanese.

Built at the pond's edge by a koi enthusiast, for koi enthusiasts.

No account is needed to explore the shop, browse the marketplace or use
the feeding calculator. Create a free account to manage your own koi,
ponds and devices. Premium adds unlimited ponds and fish, monthly studio
image credits and custom control panels.