Aquarium Water Test: Tank Log

Is your water safe, and when — and how much — should you change it?

Support

Something not working, or an idea for the app? Email tankgauge@doesonejob.com and include your device model and iOS version — we read everything.

Common questions

How do I get started?

Open the app and follow the on-screen guide — no account or setup required.

Where is my data stored?

On your device. Aquarium Water Test has no accounts and no analytics; nothing leaves your phone.

How do I manage my subscription?

In your device's Settings → Apple Account → Subscriptions.