KoiLog is a private, offline-first koi pond logbook for iOS: water testing with safe-range charts, a temperature-driven feeding guide, koi growth tracking, maintenance reminders, treatment logs, and a salt-treatment calculator.
Where is my data? Entirely on your device. There is no account and no cloud. Deleting the app deletes your data, so export CSVs first if you need a backup.
Why does it say "Do not feed"? The feeding guide follows water temperature. Below 50 °F koi can't digest food, and below 40 °F they're dormant — this is normal for cold ponds.
Do koi need salt? No — koi are freshwater fish. The salt calculator is for optional short-term therapeutic treatments only.
Restore purchases: Settings → Restore Purchases with the same Apple ID.
Email tobysneaker6@gmail.com and we'll get back to you.