ReefTracker

ReefTracker helps you keep your reef aquarium healthy by tracking your water parameters over time — completely offline, with no account and no ads.

Log a reading in seconds, see at a glance whether each value is in a safe range, and watch trends build up over time so you can react before problems start.

WHAT YOU CAN TRACK
- Alkalinity, calcium, magnesium and the key salts
- Salinity, pH and temperature
- Nitrate, phosphate, ammonia and nitrite
- Trace elements: potassium, strontium, iodine, ORP and more

HEALTH ZONES
Every parameter shows a clear green / amber / red zone so you instantly know if a value is good, borderline, or out of range. Target ranges are tailored to your tank type — fish-only, soft coral, LPS, SPS or mixed reef.

HISTORY & GRAPHS
View your readings as easy-to-read graphs with the safe ranges drawn right on the chart, so trends and drift are obvious.

HANDY TOOLS
- Dosing calculator for your supplements
- Magnesium-to-calcium ratio view
- Salinity converter (ppt ↔ SG)
- Multiple tanks, each with its own setup

YOUR DATA STAYS YOURS
ReefTracker works fully offline. All your data is stored only on your device — nothing is uploaded, tracked or shared. Create your own backups whenever you like.

Whether you run a single nano tank or a mixed reef system, ReefTracker keeps your parameters organized and your corals thriving.