AquaLog: Aquarium Water Log

AquaLog is a simple water-quality log for people who keep aquariums — freshwater, planted or reef.

Test your water, write the numbers down, and let AquaLog remind you what needs doing. No spreadsheet, no guesswork, no account to create.

LOG A TEST IN SECONDS • pH, ammonia, nitrite, nitrate, temperature, GH and KH in one short form • Backdate a test you took earlier, or copy your last one and change only what moved • Edit any reading later — mistakes happen

NEVER MISS MAINTENANCE • Reminders for water changes, filter cleaning, feeding and anything else you do • Repeating daily, weekly or monthly, with a notification when it is due • Everything that needs attention, in one place on the home screen

FOLLOW EACH TANK OVER TIME • A dated photo album for every aquarium • A full timeline of every test, with swipe to delete and CSV export • A fish list with a stocking check that warns you before a tank gets crowded

AQUALOG PRO • Parameter trends and charts, so you spot a problem forming before your fish do • Cycle tracker for new tanks — watch ammonia and nitrite fall as nitrate rises • Symptom checker: pick what you are seeing and get the likely causes and what to do next • Unlimited aquariums, reminders and photos • iCloud sync, so your iPhone and iPad stay in step

FREE TO START One aquarium, up to three reminders, five photos per tank — and unlimited water tests, always. Testing your water is the habit that matters, so we never limit it.

PRIVATE BY DESIGN No account and no sign-up. Your log stays on your device and everything works offline. iCloud sync is optional and uses your own private iCloud account.

Available in English, French, Italian, Spanish and Portuguese.

Stop guessing. Start keeping.