The Best Pool Chemistry App for Home Pool Owners
Most pool apps are designed for pool service companies or try to sell you a subscription. Pool Clarity is built for the person standing next to their pool with a test strip, wondering what to do next.
What makes a good pool chemistry app?
After testing dozens of pool apps, here is what actually matters: it needs to know your pool. A 12,000-gallon screened pool in Florida needs completely different treatment than a 25,000-gallon outdoor pool in Colorado. Generic calculators that do not account for your pool's specifics give you generic advice.
It also needs to speak plain English. Telling someone their "LSI is -0.3 and the water is slightly aggressive" is not helpful if they do not know what LSI means. Saying "your pH is a bit high at 7.9, which means your chlorine is only working at about 65% effectiveness, so add 14 oz of muriatic acid" is actionable.
And it should be affordable. You already spend enough on pool chemicals. You should not need a $10/month subscription just to figure out how much to add.
How Pool Clarity works
You set up a pool profile once with your pool's size, type, sanitizer, location, and environment. Then every time you test your water, you enter your readings and Pool Clarity tells you exactly what to add, how much, and in what order. The dosing amounts are calculated for your specific pool volume, not a generic "per 10,000 gallons" chart.
Pool Clarity is fully free. You get the personalized chemistry calculator, water assessments in plain English, unlimited reading history, trend charts, a maintenance schedule, a service report card if you have a pool company, a cost tracker, and weekly testing reminders. No subscription, no premium tier, no paywall.
We earn a small commission when you buy pool chemicals through the Amazon links inside the app. That is the entire business model. No ads, no data selling, no surprise charges.
Get Pool Clarity on your iPhone
Enter your test strip readings and get personalized dosing instructions in under a minute. Free on iOS.
How Pool Clarity compares
Most pool chemistry apps fall into two camps: over-simplified calculators that give generic advice, or complex tools designed for pool professionals. The simplified ones do not account for your specific pool, so their dosing is approximate at best. The professional ones assume you already understand water chemistry terminology and just need a calculation tool.
Pool Clarity sits in the middle. It does the same calculations a pool professional would do, but explains everything in language any pool owner can understand. And because it knows your pool's specifics, the dosing is accurate for your situation, not a one-size-fits-all estimate.
There is no subscription, no premium tier, and no signup wall. Most competing apps charge $5-10 per month. Pool Clarity is fully free, supported by a small Amazon affiliate commission when users buy chemicals we recommend.