# PoolCalc vs Swimming Pool Calculator

The clearest difference is price: PoolCalc at Free against Swimming Pool Calculator's $4.99. PoolCalc also leads on iOS requirement (7.1 vs 14.0). Swimming Pool Calculator's advantage is rating (4.0 vs 1.0) and review sentiment (49% vs 17%). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

PoolCalc is free to download; Swimming Pool Calculator costs $4.99 up front. PoolCalc sells 1 one-off in-app purchase and Swimming Pool Calculator sells 4 in-app purchases, starting at $4.49 per 3 months. Whichever you choose, the download price is not the number that matters.

Swimming Pool Calculator holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: Swimming Pool Calculator has 43 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 17% of PoolCalc's written reviews are positive against 49% of Swimming Pool Calculator's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 15, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | PoolCalc | Swimming Pool Calculator |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/poolcalc/id514707093/reviews) | **[4.0 (43 ratings)](https://appshunter.io/ios/app/swimming-pool-calculator/id1591745680/reviews)** |
| Number of ratings | 1 | **43** |
| Positive reviews | 16.7% of reviews | **49.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 116 MB |
| Requires iOS | **7.1** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bonham Customs](https://appshunter.io/developer/514707096) | [Fernando Montero](https://appshunter.io/developer/1591745682) |

## What reviewers say

### PoolCalc

[App page](https://appshunter.io/ios/app/poolcalc/id514707093)

This utility calculates the scaling potential of pool water using the Langelier Saturation Index. It allows users to save and edit readings, locations, and add notes. A paid upgrade offers advanced features for pool professionals.

**Highlights:** Langelier Saturation Index calculation, Save and edit readings, Save and edit locations, Add notes to readings, Quick add readings to locations, Paid upgrade for multiple location routes

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pool Professional Upgrade | $2.99 | one-time |


### Swimming Pool Calculator

[App page](https://appshunter.io/ios/app/swimming-pool-calculator/id1591745680)

Easily calculate necessary pool chemicals and troubleshoot common water issues like green or cloudy water. This app provides daily and weekly maintenance routines to keep your pool water crystal clear and ready for swimming.

**Highlights:** Chemical calculation, Water issue troubleshooting, Daily maintenance routines, Weekly maintenance routines, Crystal clear water maintenance

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Suscripción Premium | $4.49 | per 3 months |
| Suscripción Gold | $6.99 | per 3 months |
| Suscripción Platinum | $7.99 | per month |
| Suscripción Adamantium | $49.99 | per month |


## Frequently asked questions

### Is PoolCalc free?

PoolCalc is free to download, with in-app purchases available.

### Is Swimming Pool Calculator free?

Swimming Pool Calculator costs $4.99, and also offers in-app purchases.

### Which has better reviews, PoolCalc or Swimming Pool Calculator?

Swimming Pool Calculator is rated higher. PoolCalc averages 1.0 out of 5 from 1 ratings, while Swimming Pool Calculator averages 4.0 from 43 ratings.

### Do PoolCalc or Swimming Pool Calculator have ads?

Neither PoolCalc nor Swimming Pool Calculator shows ads.

### Which is updated more often, PoolCalc or Swimming Pool Calculator?

PoolCalc ships an update every 2 months, and Swimming Pool Calculator every 2 months. Most recently, PoolCalc was updated on October 15, 2026 and Swimming Pool Calculator on October 22, 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.*