Your tank health,
not guesswork.
Log every parameter, track your livestock, plan compatibility, and stay on top of maintenance — all free. Add Finn, our AI assistant, when you want something that actually reads your data before answering.
- Free to download
- Finn (optional)
The app
Built around how you actually keep a tank.
Parameters logged and charted. Livestock tracked with compatibility checks. Maintenance on a schedule you set. Supports as many tanks as you run — free on iOS and Android, no hardware required.
Your tank health, at a glance
See live status, latest parameters, and what needs attention the moment you open the app.
Finn — optional AI assistant
An optional AI agent that helps manage your tank by chat, whenever you want it.
Set up your tank in a minute
A guided onboarding builds a digital twin of your aquarium on first launch.
Free to download
Finn — optional AI assistant
Answers from your data, not a script.
Finn reads every parameter you've logged and knows what's living in your tank before it answers — so "why is my torch not opening?" gets a useful response, not a generic one. No tank camera, no subscription required to track.
Ask your tank anything
Finn knows your logged parameters and what's in your tank — so it gives you a real answer, not boilerplate care sheet advice.
Photo ID for fish & coral
Snap a photo and get a species ID with care notes, ideal parameters, and compatibility info — pulled straight from the species library.
Diagnose by photo
Point your camera at algae, a stressed fish, or off-color water and get a likely cause with clear next steps — not a wall of possibilities.
Catches slow drift
Most crashes don't happen overnight — they drift. AquaSense watches your parameter trends and warns you before the slow slide becomes a problem.
Stocking & compatibility
Check who gets along, size your bioload, and plan a tank before you buy — so you're not returning a $90 fish on a Saturday.
Maintenance that sticks
Set your water-change and dosing cadence once. AquaSense nudges you when it's due and keeps a clean log when you check it off.
Plenty of apps can log your tank. AquaSense helps you understand it.
Problem detection comes from the readings you log — there's no tank camera to mount, no video feed to pay for. The full app is always free. Finn is an optional upgrade for when you want a second opinion.
The basics, done right
The stuff every tank actually needs.
Log every parameter
Temperature, salinity, pH, alkalinity, calcium, magnesium — charted over time so you can see where things are drifting before they become problems.
Maintenance on schedule
Set your water-change and dosing cadence. AquaSense nudges you when it's due, and keeps a tidy log once you check it off.
Multi-tank support
Reef, planted, and quarantine tanks all in one app — each with its own parameters, livestock, and maintenance history.
Meet the AquaSense ATO — the zero-maintenance sump.
We're building the AquaSense ATO — an auto top-off that keeps your sump level rock-steady with strictly external, non-contact sensors. No optical sensors or float switches sitting in the water, so there's nothing to clean, foul, or stick. It isn't for sale yet — join the waitlist and you'll be the first to know when it ships.
- Strictly external, non-contact sensing — no optical sensors or float switches inside your sump
- Zero maintenance: nothing in the water to clean, calcify, or jam
- On-device failsafes that run even when Wi-Fi is down
- Pairs with the AquaSense app you already use
No spam — one email when it's ready to ship.
See the full ATO pageAlso from AquaSense
Meet the Beacon — the hub that connects it allCommon questions
Anything else?
Stop babysitting your tank.
Set up your first tank in minutes. Parameters, livestock, maintenance — the full app is free. Add Finn if you want it.
- Free on iOS & Android
- No ads or dark patterns