# Pool Chem Calculator vs HdPass

The clearest difference is in-app purchases: HdPass at none against Pool Chem Calculator's 1. HdPass also leads on ads (none vs shown). Pool Chem Calculator's advantage is iOS requirement (16.6 vs 18.0). On price and device support there is nothing between them.

Both are free to download. Pool Chem Calculator sells 1 in-app purchase, starting at $1.99 per month. HdPass asks for nothing beyond the download.

## The numbers

| Metric | Pool Chem Calculator | HdPass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (41 ratings)](https://appshunter.io/ios/app/pool-chem-calculator/id1453351222/reviews)** | — |
| Number of ratings | **41** | — |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | — |
| Monetization | Free with in-app purchases | — |
| Size | 118 MB | 1 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gunter Business Solutions Inc](https://appshunter.io/developer/1453351221) | [Haodong Zhou](https://appshunter.io/developer/1856774241) |

## What reviewers say

### Pool Chem Calculator

[App page](https://appshunter.io/ios/app/pool-chem-calculator/id1453351222)

This app helps manage pool chemistry with 24 specialized calculators for dosing, pH, and more. It features a customizable maintenance calendar, equipment tracking, and easy report sharing for up to 100 pools. Ideal for maintaining a clean and swim-ready pool.

**Highlights:** 24 precision pool chemical calculators, Customizable maintenance calendar with notifications, Equipment tracking and management, Multi-user pool sharing, Professional report builder, Smart pool route mapping

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Pool Subscription | $1.99 | per month |


### HdPass

[App page](https://appshunter.io/ios/app/hdpass/id6755859546)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pool Chem Calculator free?

Pool Chem Calculator is free to download, with in-app purchases available.

### Is HdPass free?

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

### Do Pool Chem Calculator or HdPass have ads?

Pool Chem Calculator shows ads; HdPass does not.

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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.*