# Swimming Pool Calculator vs Spin Piscinas

The clearest difference is price: Spin Piscinas at Free against Swimming Pool Calculator's $4.99. Spin Piscinas also leads on in-app purchases (none vs 5) and update cadence (every 8 days vs every 2 months). On ads and device support there is nothing between them.

Spin Piscinas is free to download; Swimming Pool Calculator costs $4.99 up front. Swimming Pool Calculator sells 4 in-app purchases, starting at $4.49 per 3 months. Spin Piscinas asks for nothing beyond the download.

Swimming Pool Calculator ships an update every 2 months, Spin Piscinas every 8 days. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Swimming Pool Calculator | Spin Piscinas |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.0 (44 ratings)](https://appshunter.io/ios/app/swimming-pool-calculator/id1591745680/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 49.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 116 MB | 132 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fernando Montero](https://appshunter.io/developer/1591745682) | [spin SA de CV](https://appshunter.io/developer/1099375421) |

## What reviewers say

### 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 |


### Spin Piscinas

[App page](https://appshunter.io/ios/app/spin-piscinas/id6449788993)

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

**In-app purchases:** none


## Frequently asked questions

### Is Swimming Pool Calculator free?

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

### Is Spin Piscinas free?

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

### Do Swimming Pool Calculator or Spin Piscinas have ads?

Neither Swimming Pool Calculator nor Spin Piscinas shows ads.

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

Swimming Pool Calculator ships an update every 2 months, and Spin Piscinas every 8 days. Most recently, Swimming Pool Calculator was updated on November 7, 2026 and Spin Piscinas on November 3, 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.*