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
1.2
September 30, 2026
Better recommendations: • High combined chlorine now gets a real dose. PoolLog calculates breakpoint chlorination, raising free chlorine to 10 × combined chlorine, instead of showing "Unable to calculate". • Choosing water to lower a level now tells you how much to drain and refill, as a percentage and in your pool's volume unit. Fixes and polish: • A number typed just before tapping the checkmark is now always saved. Previously the last value could be missed, or the form could say no results were entered. • Closing a form with unsaved entries now asks before discarding them. • Deleting a pool now asks first and shows how many logged events will be removed. Your last remaining pool can no longer be deleted. • Levels and ranges are formatted consistently, with the right number of decimals for each test. • Text on the level colors is easier to read in both light and dark mode. • History shows the year on entries from previous years, and no longer flashes "No history yet" while it loads. • On iPad, level tiles no longer cut off values, and the entry open in History is highlighted. • Readings from the last minute show "Just now" instead of "in 0 seconds". • The country picker lists only countries. • Better VoiceOver labels throughout. • Improved Spanish and French translations. 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.
