# Pool Water Calculator vs iopool

The clearest difference is price: iopool at Free against Pool Water Calculator's $4.99. Pool Water Calculator's advantage is ads (none vs shown) and rating (4.6 vs 4.3). On ratings volume, update cadence, in-app purchases and device support there is nothing between them.

iopool is free to download; Pool Water Calculator costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pool Water Calculator holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 95 and 95 respectively. Written reviews point the same way: 77% of Pool Water Calculator's written reviews are positive against 60% of iopool's.

Pool Water Calculator ships an update fortnightly, iopool every 2 weeks. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Pool Water Calculator | iopool |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.6 (95 ratings)](https://appshunter.io/ios/app/pool-water-calculator/id1249919347/reviews)** | [4.3 (95 ratings)](https://appshunter.io/ios/app/iopool/id1449698927/reviews) |
| Number of ratings | 95 | 95 |
| Positive reviews | **76.7% of reviews** | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 30 MB | 78 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ingenio Productions LLC](https://appshunter.io/developer/1249919346) | [Iopool](https://appshunter.io/developer/1449698926) |

## 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


### iopool

[App page](https://appshunter.io/ios/app/iopool/id1449698927)

This app helps pool owners manage their water treatment with continuous analysis from a smart probe. It provides step-by-step guidance for product additions and intelligent recommendations for maintenance, eliminating the need for manual inventory checks.

**Highlights:** Continuous water analysis, Automated product addition notifications, Step-by-step treatment guidance, Intelligent maintenance recommendations, Product inventory and quantity management, Pool health monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pool Water Calculator free?

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

### Is iopool free?

iopool is free to download, with no in-app purchases.

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

Pool Water Calculator is rated higher. Pool Water Calculator averages 4.6 out of 5 from 95 ratings, while iopool averages 4.3 from 95 ratings.

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

iopool shows ads; Pool Water Calculator does not.

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

Pool Water Calculator ships an update fortnightly, and iopool every 2 weeks. Most recently, Pool Water Calculator was updated on October 29, 2026 and iopool on October 24, 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.*