# Pool Water Calculator vs Pool Math Calculator

The clearest difference is price: Pool Math Calculator at Free against Pool Water Calculator's $4.99. Pool Math Calculator also leads on rating (4.8 vs 4.6). Pool Water Calculator's advantage is in-app purchases (none vs 1) and update cadence (fortnightly vs every 2 months). On ratings volume, ads, monetization model and device support there is nothing between them.

Pool Math Calculator is free to download; Pool Water Calculator costs $4.99 up front. Pool Math Calculator sells 1 one-off in-app purchase. Pool Water Calculator asks for nothing beyond the download.

Pool Math Calculator holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 94 and 43 respectively.

Pool Water Calculator ships an update fortnightly, Pool Math Calculator every 2 months. The most recent releases landed on September 24, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Pool Water Calculator | Pool Math Calculator |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.6 (94 ratings)](https://appshunter.io/ios/app/pool-water-calculator/id1249919347/reviews) | **[4.8 (43 ratings)](https://appshunter.io/ios/app/pool-math-calculator/id6746519942/reviews)** |
| Number of ratings | **94** | 43 |
| Positive reviews | 76.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | Free |
| Size | 30 MB | 4 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ingenio Productions LLC](https://appshunter.io/developer/1249919346) | [Sergii Nesterenko](https://appshunter.io/developer/1686841405) |

## What reviewers say

### Pool Water Calculator

[App page](https://appshunter.io/ios/app/pool-water-calculator/id1249919347)

This app helps you precisely balance and maintain your pool or spa water chemistry. It offers a chemistry calculator, pool volume measurement, and detailed data logging with visual trend analysis. Get tailored recommendations and manage multiple water profiles with ease.

**Highlights:** Chemistry calculator for precise chemical dosages, Pool volume calculator, Data logging for test results and additions, Visual trend graphs for water chemistry, Personalized chemical recommendations, Manage multiple pool/spa profiles, Broad chemical support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Pool Math Calculator

[App page](https://appshunter.io/ios/app/pool-math-calculator/id6746519942)

This app simplifies pool water chemistry by calculating precise chemical dosages for balanced water. It helps estimate the impact of adding various chemicals and determines pool volume from basic measurements. Designed for practical, everyday pool maintenance, it keeps essential information readily accessible.

**Highlights:** Chemical dosing calculations, Water balance targets, Chemical addition effect estimation, Pool volume calculation, Pool settings tracking, CSI target checks

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $12.99 | one-time |


## Frequently asked questions

### Is Pool Water Calculator free?

Pool Water Calculator costs $4.99, with no in-app purchases.

### Is Pool Math Calculator free?

Pool Math Calculator is free to download, with in-app purchases available.

### Which has better reviews, Pool Water Calculator or Pool Math Calculator?

Pool Math Calculator is rated higher. Pool Water Calculator averages 4.6 out of 5 from 94 ratings, while Pool Math Calculator averages 4.8 from 43 ratings.

### Do Pool Water Calculator or Pool Math Calculator have ads?

Neither Pool Water Calculator nor Pool Math Calculator shows ads.

### Which is updated more often, Pool Water Calculator or Pool Math Calculator?

Pool Water Calculator ships an update fortnightly, and Pool Math Calculator every 2 months. Most recently, Pool Water Calculator was updated on September 24, 2026 and Pool Math Calculator on September 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*