Pool Chemical Dose Calculator vs QR Code Reader barcode Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pool Chemical Dose Calculator
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.
- 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
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Pool Chem Dose Calculator will calculate the exact chemical dose needed for 38 chemicals in 11 categories for any size pool in US Imperial or Metric measures. To use it you enter the pool volume in gallons or liters, choose US Imperial or Metric, select which item you want to change from the drop down list and then enter the desired change in ppm or mg/l. Pool Chem Dose Calculator then lists all of the chemicals that can be used for that item change and the doses for each one. It only shows 3 chemicals on the screen. If there are more than 3 for an item, you can scroll down the list. No brand names, no sales just the exact dose of the chemical you want to use by chemical name. Use it while you are at a pool or in the field to find out how much chemical to add to make a correction or increase or decrease a condition. Select from the following items: Increase Chlorine, 15 chemicals Increase Bromine 2 chemicals Increase Alkalinity 3 chemicals Decrease Alkalinity 2 chemicals Increase Hardness 2 chemicals Increase CYA 2 chemicals Increase Oxidizer 1 chemical Decrease Chlorine 6 chemicals Increase Salt 1 chemical Increase Borate 3 chemicals Increase Copper 1 chemical. For example, if you want to Increase Chlorine by 3 ppm in a 14,750 gallon pool, enter 14750, select US Imperial, select Increase Chlorine from the drop down menu and enter 3.0 in ppm. Instantly see the amounts needed to get 3.0 ppm chlorine in that pool for 15 types of chlorine. Makes it easy to compare and see which might be cheaper to use or make a substitution. You can also use the Pool Chem Dose Calculator to figure out the change to a water condition if you add an amount of chemical. For instance suppose you have a 15,000 gallon pool and you want to know how much the free chlorine will increase if you add a gallon of 10% liquid chlorine. No problem, just enter the pool volume, select US Imperial, select Increase Chlorine and then enter an amount for ppm. Keep changing the ppm up or down until the dose amount for Chlorine 10% gets near 128 fl oz or 4 qts. Saves money because you get the exact dose for that pool – no more guessing. Have an emergency where too much chlorine was added and now you need to neutralize the chlorine in the pool? No problem, Just enter the pool volume, US or Metric, select Decrease Chlorine and enter the amount of chlorine you want neutralized and you get the amounts needed for 6 chlorine neutralizers. You will find this app invaluable.
QR Code Reader barcode Reader
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A free QR code scanner app designed for simplicity and intuitive operation. Launch the app to instantly activate the camera and quickly scan QR codes. You can also scan QR codes from images in your photo album. Key Features: • Fast startup with precise scanning • Ability to read QR codes from photo albums • Built-in flashlight for low-light environments • Compatible with both QR codes and barcodes • Automatically saves scan history for easy review • Quickly check barcode products with online search
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Pool Chemical Dose Calculator | QR Code Reader barcode Reader |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 2.9 (13 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 11 months | Every 4 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 1 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Hasa Inc. | Shufu Lin |
In-app purchases
Pool Chemical Dose Calculator
No in-app purchases
QR Code Reader barcode Reader
No in-app purchases
Questions
Is Pool Chemical Dose Calculator free?
Is QR Code Reader barcode Reader free?
Do Pool Chemical Dose Calculator or QR Code Reader barcode Reader have ads?
Which is updated more often, Pool Chemical Dose Calculator or QR Code Reader barcode Reader?
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