The intelligent reef tank app for ICP and Apex.
Imports Triton results. Reads your Hanna Checker.
Forecasts when you'll run out of salt.
Because reefing is hard enough without running out of salt the day you need a water change.
What it does
Every other reef app shows you numbers. AquaSensei reads them, explains them, and knows your tank.
Reads your ICP
Triton today. ATI and Oceamo soon. Interpreted against your livestock. Fixes your tank, not upsells you.
Watches your Apex
Probes, outlets, DOS rates. In an interface that breathes. Coming summer 2026.
Thinks like a reefer
Reads R2R, not Reddit. Cites its sources. Won't dose at 1000x.
From new tank to in control, in three steps.
No spreadsheets. No CLI. No reading the manual. Just the loop reefers actually run.
Tell Sensei about your tank.
Pick saltwater or freshwater, the style (SPS, mixed, soft / LPS, FOWLR, planted, shrimp), size and age. Snap a photo if you have one. Sensei says hello in your voice — not boilerplate.
Log readings the way you actually test.
Photo of a Hanna Checker LCD. Photo of a colour strip against the reference card. Refractometer eyepiece. Triton ICP PDF. Manual entry. Whatever is in front of you, Sensei reads it and lets you confirm before it saves.
Get the answer, not the dump.
The Sensei Score tells you what's actually going on, in three short sentences with one concrete next step. Tasks remind you before things drift. Supplies forecast when you'll run out. Reefing without the Friday-night panic.
What's missing everywhere else
What the rest of the reef-app shelf actually charges for.
| Feature | AquaSensei | Apex Fusion | Aquarimate | Aquabuildr | Reefability |
|---|---|---|---|---|---|
| Unlimited tanks | Free | N/A | Limited | $60/yr | Limited |
| Reminders & tasks | Free | Manual | Yes | Yes | $25/yr |
| Triton / ATI / Oceamo ICP import | Yes | No | No | Manual rows | No |
| Photo OCR (Hanna / strip / refractometer) | Yes | No | No | No | No |
| AI tank narrative grounded in your readings | Yes | No | No | No | No |
| Apex Fusion live data | Summer 2026 | Native | No | No | No |
| Supply forecasting (run-out date) | Yes | No | No | Manual | No |
| Works offline | Yes | Cloud-only | Limited | Limited | No |
| Export your data | Anytime | No | Limited | Limited | No |
| Subscription required | No | Tied to hardware | Yes | Yes | Yes |
Free. Forever for the core.
- Unlimited tanks · display, frag, quarantine
- Unlimited readings, tasks, supplies
- Triton ICP import · ATI & Oceamo soon
- Photo OCR for Hanna, strip, refractometer
- Sensei Score with AI-generated narrative
- Reminders, supply forecasting, photo timeline
- Export your data anytime
Free during beta and free at launch for the core. We may add optional paid extras later (Apex live polling, advanced AI). Affiliate links on reorder cards keep the lights on. No subscription ransom for basic reef-keeping.
Built by reefers, for reefers.
AquaSensei is built by Tom Linly and the team at PrintedReef — the reef-keeper-owned shop that makes 3D-printed reef gear. Tom runs a 120-gallon SPS-dominant reef on Apex, Trident, and DOS. Every feature you see here came from a real frustration on his own tank.
The app is the reef-keeping companion he wanted but couldn't find — so we built it. No subscription ransom. No data sales. No upsell loop disguised as advice. Just the calm, specific reef-tank operator we wish we'd had on our first build.
We ship every week and listen to every piece of feedback. The changelog is our receipts.