Acro Reef

Acro is the reef tracker for SPS keepers who care about every frag.

Every Acropora, Stylophora, and Montipora gets its own record — not a line in a spreadsheet. Track where you got it, what you paid, and how it's growing. Compare today's photo against last month's with a side-by-side slider, and watch bleaching or recession build up week by week instead of catching it too late.

WATER TRENDS THAT MATTER
Daily alkalinity, calcium, magnesium, nitrate, phosphate, salinity, temperature, and pH readings stop being numbers and start being a line. Acro draws a target band for each parameter, flags swings before they kill, and overlays your treatment markers so you can see what changed when.

TREATMENT SCHEDULING, DONE RIGHT
Built-in protocols for the dips and tank treatments serious SPS keepers actually use — Bayer Dip (AEFW), Interceptor (Red Bugs), Levamisole (AEFW), Peroxide Dip (algae/cyano), Fluconazole (Bryopsis). Dose-progress pips track which doses you actually completed, not just what was scheduled. Today-screen reminders surface what's due.

ON-DEVICE, NO ACCOUNTS
Your reef data lives on your device. No cloud account to sign up for, no analytics, no telemetry, no tracking. Acro adapts to both iPhone and iPad — log a water test from your phone in the morning, review photo timelines on the iPad in the evening.

FREE TO TRY
Free tier: track up to 2 corals, keep 30 days of water history, and store up to 3 photos per coral. Treatment logging is unlimited so new SPS keepers can get help with the protocols immediately.

ACRO PRO — ONE-TIME PURCHASE
Unlock unlimited corals, full water history, unlimited photos per coral, CSV export, and advanced reminders. Buy once. Yours forever. No subscription, no recurring charge.

IMPORTANT — TREATMENT DISCLAIMER
Treatment protocols, dosages, and durations shown in Acro are hobbyist references compiled from public reefkeeping sources. They are not veterinary advice. Always verify dosing with the chemical's product label and your own research before use; some compounds (e.g. levamisole, fluconazole, imidacloprid-based dips) are hazardous to invertebrates, pets, and humans if misused.

Acro runs on iPhone and iPad. Requires iOS / iPadOS 18 or later.