# Pool Chem – Calculator & Log — Water testing, dosing & CSI

> Water testing, dosing & CSI (iPhone/iPad app by Gun woo Kim.)

- Source: https://appshunter.io/ios/app/pool-chem-calculator-and-log/id6787830427 (this page in markdown: same URL + `.md`)
- Developer: [Gun woo Kim](https://appshunter.io/developer/1700263119)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 34 MB
- Languages: American English
- Released: 2026-07-15
- Data updated: 2026-09-13
- User reviews in markdown: https://appshunter.io/ios/app/pool-chem-calculator-and-log/id6787830427/reviews.md

## What is Pool Chem?

Test your water, type the numbers, get exact doses. Pool Chem tells you precisely how much of each chemical to add — and keeps your whole test history on your device.

EXACT DOSING
• Free chlorine: liquid chlorine (any strength), cal-hypo, dichlor, trichlor — with CYA/CH side-effect warnings
• pH: muriatic or dry acid amounts computed with real carbonate-buffer chemistry (not a rough chart)
• Alkalinity, calcium hardness, stabilizer and salt doses in oz / lb / gallons
• CSI (saturation index) so plaster doesn't etch and heaters don't scale
• FC targets that follow your stabilizer (CYA) level
• Chlorine, saltwater (SWG) and bromine pools

YOUR LOG, YOUR DEVICE
• Unlimited test logging — free, forever
• Partial tests welcome: log only what you measured
• Data stays on your device. No account. No cloud.
• Export everything to CSV anytime

ONE-TIME PURCHASE
The free version is a complete calculator with unlimited logging for one pool. Pool Chem Pro is a single one-time purchase that adds unlimited pools, trend charts, CSV export and custom targets.

No subscription. No ads. No feature removals. Ever.

Always follow chemical product labels. Add, circulate, retest.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pool Chem Pro | $9.99 | one-time |



## Version history (last 3 releases)

### 1.2.1 — 2026-08-03

Stability and reliability improvements.

### 1.1.0 — 2026-07-20

New in 1.1: Backup & restore (export/import your data) · Spanish and French localization · minor fixes.

### 1.0 — 2026-07-15

No release notes.

## More apps by Gun woo Kim

- [picswap - picture swap](https://appshunter.io/ios/app/picswap-picture-swap/id6456039579)
- [mubo - dance formation editor](https://appshunter.io/ios/app/mubo-dance-formation-editor/id6753949227)
- [LinePrompter](https://appshunter.io/ios/app/lineprompter/id6784582453)
- [Conduit Bender: Bend Calc](https://appshunter.io/ios/app/conduit-bender-bend-calc/id6786548483)
- [Tape Calc: Feet Inch Fraction](https://appshunter.io/ios/app/tape-calc-feet-inch-fraction/id6786612707)
- [Pipe Calc: Pipefitter Offsets](https://appshunter.io/ios/app/pipe-calc-pipefitter-offsets/id6786981763)

All apps by Gun woo Kim: https://appshunter.io/developer/1700263119

## Related topics

[chlorine dose calculator](https://appshunter.io/ios/topics/chlorine-dose-calculator) · [salt chlorinator](https://appshunter.io/ios/topics/salt-chlorinator)

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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 2026-09-13.*