AquaLog

Aquarium care records.
Your data stays on your device. We cannot see it.

AquaLog records water tests, feeding, water changes, maintenance and photos. No account, and no connection needed.

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AquaLog Today screen (in Chinese): quick records for water tests, feeding, water changes and observations
Daily care starts on one page.
AquaLog water quality tab (in Chinese): new test, overview and history
Water tests and trends.
AquaLog shared aquarium roles (in Chinese): what each role can do and who enforces it
See what each role can do before inviting anyone.

What "we cannot see your data" means

With a shared aquarium, records and photos are encrypted before they leave your device, and the server stores only ciphertext. We do not have the key to it.

Neither this site nor the app loads third-party analytics, advertising or trackers.

Paying does not change this: lose your Recovery Code and every device, and the data cannot be recovered. We cannot recover it either — we have never been able to read it. So the app guides you to keep and confirm your Recovery Code, and reminds you when your ways back become fewer.

One aquarium, a whole family caring for it

A shared aquarium can invite family to help, as owner, editor or viewer; every member sees the whole aquarium.