Pool Chemical Calculator Pro
Dosing, Water Test & Log
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
The pool is green and people are coming Saturday. You shocked it twice. Still green.
You just tested your pool water. The numbers mean nothing to you.
pH 7.8. Alkalinity 150. Free chlorine 1.5. CYA 60. Now what? Which chemical do you add first? How much? Do you wait between them? The chlorine bucket says "1-3 ppm" but your pool keeps turning green anyway.
The pool store will happily sell you $400 of chemicals you don't need. The forums will tell you to "just read the sticky." The other apps will show you a number and leave you staring at it.
Poolably tells you what to do.
Enter your test results. Get a numbered plan:
1. Add 16 oz muriatic acid to lower alkalinity → target 80
2. Wait 30 min. Re-test pH.
3. Add 52 oz liquid chlorine to raise FC to 6 (your CYA is 60, so you need at least 5 — not the "1-3" on the bucket)
Every step tells you why. Alkalinity before pH, because lowering one lowers the other. Chlorine last, because pH affects how well it works. Wait times between additions so they don't cancel each other out.
This is what "pool chemical calculator" actually means — not a number on a screen, but a plan you can walk outside and follow.
YOUR CYA IS PROBABLY WRONG
The #1 reason pools stay green despite constant shocking: cyanuric acid (CYA) is too high, and nobody told you that your chlorine target changes with it. If your CYA is 80, you need FC of 6-8 — not the 1-3 that every chlorine label says. Every pool store test ignores this. Poolably doesn't. Your chlorine target adjusts automatically based on your actual CYA reading.
SEE THE RESULT BEFORE YOU POUR
Tap any recommendation and see exactly what your water chemistry will look like after you add it. No surprises. No "I think I added too much." Adjust the dose, see the numbers move, then commit when you're confident.
STOP FORGETTING WHAT YOU DID LAST WEEK
Log test results in seconds. See trends over days, weeks, and months. Spot patterns — "pH spikes every Monday after weekend pool parties" — that you'd never catch testing blind.
Track every chemical you own. When you follow a treatment plan, inventory drops automatically. Get a heads-up before you run out mid-treatment.
At the end of the season, see exactly what you spent. Compare it to last year. The average pool service customer spends $1,200-$4,800/year. DIY owners who know their chemistry spend $300-$500. Now you have the receipts.
POOLS, HOT TUBS, AND SALT WATER
Chlorine, saltwater, bromine — all supported with correct chemistry for each. Hot tubs and spas get their own parameter ranges (not pool defaults crammed into a smaller volume). Run multiple pools and spas from one app.
FREE
• Full chemistry calculator with CYA-aware targets
• Step-by-step treatment plans with chemical sequencing
• Chemical effects preview
• 1 pool or spa, 30 days of history
PRO — $12.99/year or $29.99 lifetime
• Unlimited pools, spas, and hot tubs
• Unlimited history with trend charts
• Chemical inventory with auto-deduction
• Cost tracking and seasonal spend reports
• Weather-aware recommendations
• CSV export
No ads. No product pushing. No strip scanner that gives a different reading every time. Just honest chemistry from people who actually maintain pools.
poolably.com/support
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
• Re-test reminders: after treating your water, Poolably can remind you tomorrow to re-test — or weekly once your water is balanced
• Tap once to re-test when your treatment plan is done
• The guided SLAM checklist stays available while your SLAM is in progress
The developer, Solid Code, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SOLID CODE, TOO
- Size
- 13.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Poolably Pro Yearly $12.99
- Poolably Pro Lifetime $29.99
- Copyright
- © 2026 Poolably