ReefTracker - Aquarium Log

Track every parameter, dose, and maintenance task for your reef - with tank health scores, trends, and ICP import. 100% offline, no account needed.

ReefTracker is the offline reef-aquarium logbook built for hobbyists who want real insight into their tank's chemistry - not just a spreadsheet.

Log your water tests and instantly see whether each parameter is healthy, borderline, or critical with clear green/amber/red zones. Watch trends over time, catch a slow drift before it becomes a crash, and get an overall tank Health Score at a glance.

What you can track

• Core parameters: temperature, pH, salinity, alkalinity, calcium, magnesium, nitrate, phosphate, ammonia, nitrite, ORP
• 33-element ICP micro-panel for trace elements - import lab reports directly from Fauna Marin or any ZIMS-format export instead of typing every value by hand
• Multiple tanks, each with its own parameter set, targets, and history
• Water changes, carbon changes, and equipment cleaning logs
• Supplement dosing plans and a dose calculator that estimates consumption from your own test history
• Key ratios (PO4:NO3, Mg:Ca) and free-ammonia toxicity, computed automatically from your existing readings

Read your equipment directly

• Hanna checkers: connect over Bluetooth and save each result as it arrives, or point your camera at the display and let the app read the number
• ReefFactory meters, Red Sea ReefBeat devices and Neptune Apex controllers (experimental): take probe values straight off the hardware and save them as measurements
• All of it on one Connected devices page, over your own Wi-Fi - no cloud service in between

Stay on top of maintenance

• Reminders for testing, dosing, and recurring maintenance tasks (water changes, filter socks, glass cleaning, and more)
• Reverse-osmosis filter stage tracking, so you always know when the next cartridge is due

See the big picture

• Tank Health Score and Stability Score summarize where you stand and how steady you've been
• Trend detection projects when a value is headed out of range, and says so plainly when a parameter is merely swinging rather than guessing a direction
• Smart insights surface the handful of things that actually deserve your attention this week

Private by design Everything is stored locally on your device. There's no account, no sign-up, and no ads - your data is yours. Connections to aquarium hardware stay on your own network. Back up and restore anytime via the share sheet.

Built for fish-only, soft coral, LPS, SPS, and mixed reef setups alike, ReefTracker adapts its default parameters and targets to the kind of tank you run.