# Pool Chemistry - Chlor — Alkalinity, CYA & Chemical Log

> Alkalinity, CYA & Chemical Log (iPhone/iPad app by Karol Jaworski.)

- Source: https://appshunter.io/ios/app/pool-chemistry-chlor/id6759573566 (this page in markdown: same URL + `.md`)
- Developer: [Karol Jaworski](https://appshunter.io/developer/1799974477)
- Category: Utilities, Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18 · 7 MB
- Languages: American English
- Released: 2026-05-01
- Data updated: 2026-08-15
- User reviews in markdown: https://appshunter.io/ios/app/pool-chemistry-chlor/id6759573566/reviews.md

## What is Pool Chemistry?

Chlor is the precision pool chemistry companion built for serious pool owners. Stop guessing - test smarter, dose accurately, and swim in perfectly balanced water every time.

WHETHER YOU OWN A POOL, SPA, OR HOT TUB
Chlor tracks every body of water you manage. Log test results, calculate exact chemical doses, and follow a smart maintenance schedule - all in one beautifully designed app.

ACCURATE CHEMICAL CALCULATORS
- Free Chlorine - calculate exact liquid chlorine, Cal-Hypo, Dichlor, or Trichlor dose
- pH - calculate muriatic acid or soda ash to hit your target
- Total Alkalinity - sodium bicarbonate dosing with precise measurements
- CYA (Cyanuric Acid) - stabilizer additions with partial drain guidance
- Calcium Hardness - raise calcium with calcium chloride calculations
- Langelier Saturation Index (LSI) - prevent corrosion and scaling
- SLAM Calculator - shock treatment with CYA-adjusted FC targets
- Salt Level - sodium chloride additions for saltwater pools
- Volume Estimator - calculate gallons from pool dimensions

SMART TEST LOGGING
- Log your water test results with a clean, fast interface
- Color-coded status indicators show exactly which parameters are in or out of range
- Full test history with timestamps and test kit identification
- Filter tests by pool or hot tub

CYA-ADJUSTED FREE CHLORINE TARGETS
Chlor uses the scientifically correct FC:CYA ratio to calculate your ideal free chlorine range - not the oversimplified 1-3 ppm most apps use. Your pool is as unique as your CYA level.

MAINTENANCE SCHEDULE
- Create recurring tasks (skimming, filter cleaning, equipment checks) with custom frequencies
- Tasks are automatically sorted by urgency: overdue, due this week, and upcoming
- Mark tasks complete with a single tap

MULTIPLE POOLS AND SPAS
Manage your backyard pool, the hot tub, and the spa all in one app. Each body of water gets its own test history, calculator context, and maintenance schedule.

DESIGNED FOR ACCURACY
Chlor's calculation engine is based on the industry-standard chemistry formulas used by professional pool technicians. Every dose calculation accounts for your pool volume, current levels, target levels, and chemical concentration.

CHLOR PRO
Upgrade to unlock all 9 calculators, full test history, AI Pool Assistant, LSI and SLAM tools, and unlimited pools and spas.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Chlor Pro Yearly | $39.99 | per year |
| Chlor Pro Yearly Promo | $39.99 | per year |
| Chlor Pro Monthly | $4.99 | per month |



## Version history (last 4 releases)

### 1.2.1 — 2026-08-12

Under-the-hood improvements. Same features you know and use - thank you for using Chlor!

### 1.2 — 2026-07-15

Fixed "Restore Purchases" so it correctly confirms your subscription is active even when you were already subscribed before tapping it. Also improved account deletion to properly clear your Apple ID connection and guide you through revoking app access from your Apple settings.

### 1.1 — 2026-05-26

- Filter maintenance by pool or task type.
- Add heater and notes when creating a pool or spa.
- Fixed chlorine dose math and empty add flows.
- Improved light and dark mode readability.

### 1.0 — 2026-05-01

No release notes.

## More apps by Karol Jaworski

- [HairRush - End Hair Loss](https://appshunter.io/ios/app/hairrush-end-hair-loss/id6743035238)
- [Sparky - Daily Couple Fun](https://appshunter.io/ios/app/sparky-daily-couple-fun/id6744193208)
- [REMbank - Deposit Better Sleep](https://appshunter.io/ios/app/rembank-deposit-better-sleep/id6745431668)
- [Couple Duel - Fun Task Tracker](https://appshunter.io/ios/app/couple-duel-fun-task-tracker/id6745432130)
- [Snugli - Baby Tracker & Care](https://appshunter.io/ios/app/snugli-baby-tracker-and-care/id6747285231)
- [TellieTales: Bedtime Stories](https://appshunter.io/ios/app/tellietales-bedtime-stories/id6747285384)

All apps by Karol Jaworski: https://appshunter.io/developer/1799974477

## Related topics

[swimming pool chemistry](https://appshunter.io/ios/topics/swimming-pool-chemistry)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*