# Pool vs Pool Math Calculator

The clearest difference is price: Pool Math Calculator at Free against Pool's $4.99. Pool Math Calculator also leads on rating (4.8 vs 4.2). Pool's advantage is in-app purchases (none vs 1) and ratings volume (629 vs 43). On update cadence, ads, monetization model and device support there is nothing between them.

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

Pool Math Calculator holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Pool has 629 ratings behind it against 43, so its average is the more settled of the two.

Pool ships an update every 5 weeks, Pool Math Calculator every 2 months. The most recent releases landed on September 23, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Pool | Pool Math Calculator |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.2 (629 ratings)](https://appshunter.io/ios/app/pool-calculator/id412876581/reviews) | **[4.8 (43 ratings)](https://appshunter.io/ios/app/pool-math-calculator/id6746519942/reviews)** |
| Number of ratings | **629** | 43 |
| Positive reviews | 21.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 17 MB | 4 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pool and Spa Resources, LLC](https://appshunter.io/developer/1358030201) | [Sergii Nesterenko](https://appshunter.io/developer/1686841405) |

## What reviewers say

### Pool

[App page](https://appshunter.io/ios/app/pool-calculator/id412876581)

This app simplifies swimming pool and hot tub chemistry maintenance by performing all necessary calculations. It provides clear instructions on chemical dosages to maintain balanced, clear water, eliminating the need for complex charts and formulas.

**Highlights:** Chemical dosage calculations, Pool volume calculation, Chemical effects analysis, Customizable chemical ranges, Offline functionality

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Useful pool chemistry calculator
- 🚀 Makes pool maintenance easy
- 👍 Provides chemical dosage recommendations
- 🔍 Helpful 'Effects' tool to understand chemical impacts

**What reviewers complain about**

- 🐛 Accuracy issues with certain chemical calculations
- 🔍 Confusing or outdated chemical names
- 🔍 Limited customization options
- 🐛 Crashes and compatibility issues with newer iOS versions

**Reported bugs**

- App crashes on launch for many users
- Keyboard issues preventing data entry
- Incorrect chemical effect information (e.g. soda ash)
- Volume calculation not updating properly

**Requested features**

- Ability to save and track test history
- Support for multiple pools/spas
- Metric-only unit support
- More detailed chemical dosage information (e.g. weight-based)


### 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 free?

Pool 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 or Pool Math Calculator?

Pool Math Calculator is rated higher. Pool averages 4.2 out of 5 from 629 ratings, while Pool Math Calculator averages 4.8 from 43 ratings.

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

Neither Pool nor Pool Math Calculator shows ads.

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

Pool ships an update every 5 weeks, and Pool Math Calculator every 2 months. Most recently, Pool was updated on September 23, 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.*