Pool Log
Pool & Spa Chemistry, Solved
About
This app provides precise chemical dosing instructions for pools and spas based on your test results. It tracks multiple water bodies, integrates local weather data, and offers advanced features like SLAM mode for algae and CSI calculations. All data is stored locally for privacy.
What's New in Pool Log
1.1
August 13, 2026
PoolLog is now on Mac, included with your purchase. The same pools, history, and subscription carry over through iCloud. Chemistry fix: • Liquid stabilizer is now modeled correctly as Sodium Cyanurate. Bottles sold as "liquid stabilizer" or "liquid conditioner" are the dissolved salt of cyanuric acid, and they deliver less CYA than the percentage on the front of the label. PoolLog now defaults to the common 28.8% label strength and doses by the actual 22% cyanuric acid equivalent. The previous dose raised CYA about 25% less than expected. Fixes and polish: • The iCloud Sync toggle in Settings now actually turns sync on and off. • Deleting an event from History no longer leaves a stale detail view behind. • The Add Chemical, Record Expense, Log Maintenance, and Add Note screens now use the same card layout as Log Test Results, so every editor looks and feels consistent. • Tapping a maintenance reminder now opens the log with that task already checked. Previously it opened an empty checklist. • Spanish and French translations are now complete throughout the app. Your existing history and chemical preferences carry over automatically. Thanks for using PoolLog.
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FAQ
What is Pool Log?
Pool Log is a utility app designed to help pool and spa owners manage their water chemistry. It provides precise chemical dosing instructions based on user-input test results and integrates local weather data to help identify patterns affecting water balance.
How does Pool Log calculate chemical doses?
Pool Log uses established industry formulas from Taylor Technologies and the Pool & Hot Tub Alliance, the same ones used by professionals. It accounts for your pool's volume, current chemistry, and the specific concentration of the chemical product you have.
Can Pool Log manage multiple bodies of water?
Yes, Pool Log can manage multiple pools, spas, and hot tubs from a single interface. Each water body can have its own sanitizer system, surface type, target ranges, and historical data, allowing for easy switching between them.
Does Pool Log require an account to use?
No, Pool Log does not require an account to use. Your data is stored locally on your device for privacy. Optional iCloud sync is available for use across your own Apple devices.
What is SLAM mode in Pool Log?
SLAM mode (Shock, Level, And Maintain) is a feature in Pool Log designed to help users combat algae. It automatically adjusts the chlorine target, guides you through the treatment procedure, and resets once your water is back to normal.
Does Pool Log have ads?
No, Pool Log does not contain advertisements. It is a free application that focuses on providing a clean and uninterrupted user experience for managing pool and spa water chemistry.
What units does Pool Log support?
Pool Log supports Imperial, UK imperial, and metric units for measurements. This allows users to select the unit system they are most familiar with for managing their pool or spa.
How often is Pool Log updated?
The latest version of Pool Log is 0.1.4, last updated on June 12, 2026. While specific update frequency isn't detailed, this indicates active development and maintenance of the application.