# Pool vs Ecolab Sync

The clearest difference is price: Ecolab Sync at Free against Pool's $4.99. Ecolab Sync also leads on iOS requirement (12.0 vs 15.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

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

Pool ships an update every 5 weeks, Ecolab Sync every 2 months. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Pool | Ecolab Sync |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.2 (629 ratings)](https://appshunter.io/ios/app/pool-calculator/id412876581/reviews)** | — |
| Number of ratings | **629** | — |
| Positive reviews | 21.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 17 MB | 23 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pool and Spa Resources, LLC](https://appshunter.io/developer/1358030201) | [Sutro Connect Inc](https://appshunter.io/developer/1439627398) |

## 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- 🔍 Confusing or outdated chemical names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)


### Ecolab Sync

[App page](https://appshunter.io/ios/app/ecolab-sync/id6673897223)

**In-app purchases:** none


## Frequently asked questions

### Is Pool free?

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

### Is Ecolab Sync free?

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

### Do Pool or Ecolab Sync have ads?

Neither Pool nor Ecolab Sync shows ads.

### Which is updated more often, Pool or Ecolab Sync?

Pool ships an update every 5 weeks, and Ecolab Sync every 2 months. Most recently, Pool was updated on October 13, 2026 and Ecolab Sync on October 6, 2026.

---

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