PoolChem: Pool Calculator

PoolChem Tracker

In-app purchases

About this app

Stop guessing. Start knowing.
Enter your water test results and get exact dosing recommendations for your pool size: what to add, how much, and in what order. A simple Pool Health Score (0-100) shows you where your water stands at a glance.

No account. No ads. No internet required. Your data stays on your device.

Works with chlorine pools, saltwater (SWG) pools, and all pool types. Imperial and Metric units supported.

Free: includes 5 complete water test logs
• Precise chemical doses calculated for your pool size
• Pool Health Score with prioritized treatment steps to avoid overcorrecting
• CYA-adjusted chlorine targets
• Log FC, TC, pH, Total Alkalinity, Calcium Hardness, CYA, Salt, Iron, Copper, and Phosphates
• Full LSI (Langelier Saturation Index) calculator
• Smart validation to catch typos before saving
• Equipment maintenance tracker with reminders for skimmer, pump basket, filter, and SWG cell
• Chemical inventory tracking
• Built-in reference guide with recommended ranges
• Automatic light and dark mode

Pro: one-time purchase, no subscription
• Unlimited water test history
• Charts and long-term trend tracking
• Detailed Health Score breakdown with per-parameter analysis
• Trend detection with actionable insights
• Six climate zone presets for more accurate water balance targets
• Borate tracking (30-50 ppm target range)
• Maintenance history and custom maintenance schedules
• Advanced reminders with custom intervals
• Liquid chlorine and muriatic acid concentration settings
• Advanced LSI factor breakdown with a "What If?" simulator
• CSV export and import

Built by a pool owner who wanted accurate, straightforward chemistry guidance without the guesswork or the subscription fee.

What’s new

Pro users can now opt in to borate tracking from Settings. Enable it to log borate levels, see a 30-50 ppm target range, and get a heads-up when levels drift out of range. Requires separate borate test strips (Taylor, LaMotte, or AquaChek).