# Pool Chemical Dose Calculator vs QR Code Reader barcode Reader

The clearest difference is price: QR Code Reader barcode Reader at Free against Pool Chemical Dose Calculator's $5.99. QR Code Reader barcode Reader also leads on update cadence (every 4 months vs every 11 months). Pool Chemical Dose Calculator's advantage is ads (none vs shown) and iOS requirement (9.0 vs 13.0). On in-app purchases and device support there is nothing between them.

QR Code Reader barcode Reader is free to download; Pool Chemical Dose Calculator costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pool Chemical Dose Calculator ships an update every 11 months, QR Code Reader barcode Reader every 4 months. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Pool Chemical Dose Calculator | QR Code Reader barcode Reader |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[2.9 (13 ratings)](https://appshunter.io/ios/app/pool-chemical-dose-calculator/id1148385163/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 4 months** |
| Monetization | Paid | — |
| Size | 1 MB | 46 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hasa Inc.](https://appshunter.io/developer/1713193810) | [Shufu Lin](https://appshunter.io/developer/1780449717) |

## What reviewers say

### Pool Chemical Dose Calculator

[App page](https://appshunter.io/ios/app/pool-chemical-dose-calculator/id1148385163)

This app calculates the precise chemical dosage required for pool maintenance. It supports 38 chemicals across 11 categories, allowing users to input pool volume and desired chemical changes in US Imperial or Metric units.

**Highlights:** Calculates doses for 38 chemicals, Supports 11 chemical categories, US Imperial and Metric measurements, Input pool volume in gallons or liters, Adjust chemical levels by ppm or mg/l, Compares different chemical options

**Features:** Vision Pro support

**In-app purchases:** none


### QR Code Reader barcode Reader

[App page](https://appshunter.io/ios/app/qr-code-reader-barcode-reader/id6739070413)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pool Chemical Dose Calculator free?

Pool Chemical Dose Calculator costs $5.99, with no in-app purchases.

### Is QR Code Reader barcode Reader free?

QR Code Reader barcode Reader is free to download, with no in-app purchases.

### Do Pool Chemical Dose Calculator or QR Code Reader barcode Reader have ads?

QR Code Reader barcode Reader shows ads; Pool Chemical Dose Calculator does not.

### Which is updated more often, Pool Chemical Dose Calculator or QR Code Reader barcode Reader?

Pool Chemical Dose Calculator ships an update every 11 months, and QR Code Reader barcode Reader every 4 months. Most recently, Pool Chemical Dose Calculator was updated on September 21, 2026 and QR Code Reader barcode Reader on September 24, 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.*