TankMate - Fishtank management

New in 1.0: smart stocking calculator, 30-day water trends, and a 15,000-fish encyclopedia. Plan your tank, log every change, and keep your fish thriving.

TankMate is the friendly companion for everyone with a fish tank — from a first-time betta keeper to a seasoned reef hobbyist. Plan tanks, look up fish, log every change, and get gentle reminders so your aquarium stays healthy. No ads. No accounts. No subscriptions. Everything works offline.

MANAGE EVERY TANK Add as many tanks as you like — freshwater, saltwater, or brackish Each tank gets its own colour, volume, and temperature range Beautiful animated cards with a calming bubble field

15,000+ FISH AT YOUR FINGERTIPS Search by common or scientific name Care cards include temperature, pH, max size, diet, behaviour, and aggression Curated "popular" list to get you started Powered by FishBase data, cached on-device for full offline access

SMART STOCKING CALCULATOR Real-time capacity bar shows exactly how full your tank is Bioload model adjusts for body shape, not just length Suggests compatible species that fit your remaining space Clear status: Healthy → Busy → Near full → Overcrowded

COMPATIBILITY CHECKER Warns about water-type and temperature mismatches Flags aggressive pairings before you commit Surfaces issues right on the tank screen — no buried menus

WATER PARAMETER TRACKING Log pH, ammonia, nitrite, nitrate, and temperature 30-day trend charts with safe / caution / danger colour bands Status badges remind you when it's time for the next test

MAINTENANCE LOG One-tap entries for feeding, water change, filter clean, and water test Add notes and timestamps to anything you observe Filter by tank or activity type

REMINDERS THAT RESPECT YOU Daily, weekly, or custom intervals per tank Native iOS notifications — no email spam Toggle individual reminders on or off in a tap

BUILT THE WAY YOU LIKE IT Switch between metric (L, °C, cm) and imperial (gal, °F, in) any time Rich haptics, rounded typography, and gentle animations Designed for iOS 18 with full Dynamic Type support

PRIVACY-FIRST Everything stays on your device No tracking, no ads, no third-party SDKs Optional notifications are the only permission we ask for

Whether you're cycling your first 10-gallon or maintaining a planted 200-gallon community, TankMate keeps the boring bits organised so you can focus on the fish.

Happy keeping!

Fish data courtesy of FishBase (rOpenSci). TankMate is an independent app and is not affiliated with FishBase. https://fishbaseapi.readme.io/reference/license