FOR SPS REEFKEEPERS

Track every frag.
Catch every swing.

Reef companion for iPhone and iPad, built for serious SPS keepers. Photo timelines so you spot bleaching early, water trend analytics that flag swings before they kill, and treatment scheduling that remembers which doses you actually did. All on-device. No accounts.

Download on the App Store See features →
Acro Today view on iPad showing the daily summary — populated water tiles, Tank Pulse score, and recent coral photos

WHAT IT'S BUILT FOR

The way you actually keep SPS

Per-frag identity

Each coral is its own object — not a line in a spreadsheet. Acquired from where, when, at what price, with which photos.

Trend awareness

Daily readings stop being numbers and start being a line. Swings show up against your target band before the corals show stress.

Treat with care

Built-in hobbyist protocols, dose-progress tracking, and treatment markers overlaid on the water chart. With the disclaimer it deserves.

DEEP DIVE

Feature highlights

CoralDetail showing a WWC Bounce coral with photo timeline and dose markers

Photo timelines

Baseline + follow-up shots, with a compare slider. See bleaching or recession by week, not by memory.

Learn more →
Alkalinity trend chart with target band and treatment markers

Water trend charts

Range pills, target band, swing band, treatment markers — all on one chart.

Learn more →
Treatment inspector showing Interceptor (Red Bugs) protocol mid-progress on TSA Vivid Confusion

Treatment scheduling

Built-in protocols, dose-progress pips, and Today-screen reminders for what's due.

Learn more →
Tissue event panel showing an active RTN at the coral's left base

Tissue events & STN/RTN

Mark coral events on the timeline. Cross-reference with chemistry to find root causes.

Learn more →

NO SUBSCRIPTION

Buy once. Yours forever.

Free to start — track up to 2 corals, keep 30 days of water history, store 3 photos per coral. Unlock Acro Pro for a one-time US$5.99 to lift every limit. No subscription, no cloud account, no recurring charge.

  • Unlimited corals and photos per coral
  • Full water history with custom date ranges
  • CSV export & sharing
  • Advanced reminders
  • Custom water parameters
Acro Pro paywall sheet — one-time US$5.99 with Unlimited corals, Full water history, CSV export, Advanced reminders, and Custom parameters listed as benefits

WHAT'S NEW

v1.0.0 — Initial release

v1.0.0 2026-05-28
  • Aurora visual system across CoralDetail, EnhancedChart, Today, and HomeView
  • iPhone HomeView replaces the old TankSidebar root
  • SwiftData fallback banner when the persistent store can't open
  • EnhancedChart: 24h-anchored swing band, single-reading X-domain padding

Full changelog →

Ready to track your reef?

iPad & iPhone · iOS 17+ · Free with optional Pro upgrade

Download on the App Store