TankSync helps aquarium hobbyists understand their tank, not just log numbers. It shows you WHY your parameters shift — correlating water changes, feedings, and dosing with chemistry changes. Features: - 11 tank presets (reef, planted, discus, shrimp, cichlid) - Track pH, ammonia, salinity, calcium, CO2, and more - Smart maintenance reminders - PDF diagnostic reports - Local data storage, no subscription Free with one tank. Pro unlocks unlimited tanks and PDF reports.