# Pool vs AIKO HEMS

The clearest difference is price: AIKO HEMS at Free against Pool's $4.99. AIKO HEMS also leads on iOS requirement (12.0 vs 15.1). Pool's advantage is device support. On in-app purchases there is nothing between them.

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

## The numbers

| Metric | Pool | AIKO HEMS |
| --- | --- | --- |
| 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 | — |
| Update frequency | Every 5 weeks | — |
| Monetization | Free | — |
| Size | 17 MB | 121 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Pool and Spa Resources, LLC](https://appshunter.io/developer/1358030201) | [Shenzhen Aiko Digital Energy Technology Co., Ltd.](https://appshunter.io/developer/1683475467) |

## 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- 🔍 Confusing or outdated chemical names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)


### AIKO HEMS

[App page](https://appshunter.io/ios/app/aiko-hems/id6467688747)

**In-app purchases:** none


## Frequently asked questions

### Is Pool free?

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

### Is AIKO HEMS free?

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

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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.*