PoolFu - Pool & Spa Chemistry

Pool chemistry calculated for your water. Exact doses matched to your equipment, surface, and conditions. Ask Splash about your water and get answers based on your pool.

PoolFu is a complete pool and spa care system that tells you exactly what and how much to add, and when your water is safe to use. It goes beyond a simple pool chemical calculator by checking how your readings, equipment, surface, weather, and history affect each other before giving clear recommendations for safe, clean, crystal-clear water.

You can go as deep as you like, or just follow the recommendations. Basic pool calculators treat each reading in isolation. PoolFu considers how everything works together with as a unified system. A saltwater generator can push pH upward. Total alkalinity affects pH stability. CYA changes the meaning of your chlorine level. Temperature changes how heated pools and spas behave.

Note: PoolFu requires a subscription to use. Every new account includes a 14-day free trial, and you can cancel anytime during the trial. No trial is available for Pro subscriptions.

PoolFu works offline when you need it, and keeps your pools, spas, tests, and history synced across devices.

SAFER WATER GUIDANCE PoolFu tells you whether your pool or spa is safe to use, needs caution, or should stay closed for now. If sanitizer is too low, a chemical combination is risky, or a recovery plan needs time to work, PoolFu explains the reason before anyone gets in the water.

SMARTER DOSING Every recommendation tells you what to add, how much to add, and why. PoolFu coordinates chlorine, pH, alkalinity, calcium, stabilizer, salt, temperature, surface, equipment, and recent test history, so one correction does not create another problem.

ASK SPLASH Ask Splash questions like: Why is my pool cloudy? What does CYA do? Is it safe to swim right now? Splash uses your pool or spa profile, recent readings, equipment, and history to answer in plain language.

HEALTH SCORE See one clear score from 0 to 100 showing where your water stands. PoolFu weighs the full chemistry picture, tracks trends, and uses water balance analysis to flag corrosive or scale-forming conditions.

HOT TUBS AND SPAS PoolFu supports spa-specific chemistry, bromine guidance, drain-and-refill flows, and over 1,700 hot tub models from 160+ brands. Your spa model helps PoolFu give more specific water-care guidance instead of generic hot tub advice.

SALTWATER POOLS PoolFu includes specs for 616 saltwater generator models from 129 manufacturers, with model-specific salt targets, output guidance, pH drift handling, and sanitizer behavior.

WEATHER-AWARE Real-time conditions, freeze warnings, and rain correlation help PoolFu understand why your water changed. If salt drops after a storm, PoolFu connects the dots.

TRUST No ads. No chemical company sponsors. PoolFu recommends what your water actually needs, based on real chemistry, not what a brand wants to sell you.

MULTI-LINGUAL PoolFu supports English, Spanish, Portuguese, German, Italian, French, Chinese (Simplified and Traditional), and Japanese.

FOR POOL SERVICE PROFESSIONALS PoolFu Pro is also available as a separate monthly subscription for pool service businesses. Manage customers, pools, spas, visits, photos, videos, service notes, recurring schedules, branded PDF reports, and chemical inventory from one place.

Start a visit, test water, apply treatments, log geotagged media, and check out with a workflow that helps prevent data from being saved to the wrong pool. Track truck inventory and personal chemical products from 2,721 chemicals across 180+ brands, so PoolFu can reference your actual products in every dosing calculation.

Master your water.

Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Payment is charged to your Apple ID account at confirmation of purchase. Manage or cancel anytime in Apple ID settings.

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