Pool Log
Water Chemistry & Maintenance
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
0.1.4
June 12, 2026
Bug fixes: • Calculated values like CSI no longer show a dozen decimal places in History (0.10000000000000142 is now just 0.1). • CSV export now rounds numbers properly, and water temperature exports in your unit (°F or °C, named in the column header) instead of raw Celsius. Thanks for using PoolLog.
MoreSubscription plans
Monthly Plan
Monthly Subscription to Premium
Developer apps
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.