---
title: "Pool-Calculator - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Looking for help with calculations for your swimming pool or hot tub chemistry maintenance? The Pool Calculator does all the math for you, making chemical testing and treating your pool or hot tub a b"
---

# Pool-Calculator — United States
> Pool chemistry made easy!

![Pool App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/83/7c/b6/837cb602-9e05-2b63-7887-e0ab75cc5333/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [Pool and Spa Resources](https://apptail.io/developer/pool-and-spa-resources-NJHb) (United States)
**Category:** Lifestyle
**Rating:** 4.2/5 (630 ratings)
**Price:** Free
**Bundle ID:** com.psiflow.poolcalculator
**Store:** Apple App Store
**Country:** United States
**Version:** 6.0.1 (released 2025-10-06)
**Original Release:** 2011-01-07
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id412876581)
**AppTail Page:** [https://apptail.io/app/pool-calculator-Esad/united-states](https://apptail.io/app/pool-calculator-Esad/united-states)

## Pool Description
Looking for help with calculations for your swimming pool or hot tub chemistry maintenance? The Pool Calculator does all the math for you, making chemical testing and treating your pool or hot tub a breeze.

Pool Calculator is easy to use, and tells you exactly how much of each chemical to add to keep your water in balance and crystal clear. No more puzzling over complicated charts and formulas.

Bring your iPhone or iPad out to the pool and have all the chemical information and calculations you need right at your fingertips.

Pool Calculator works offline and online, so if you have poor internet reception by your pool, you’re still able to get test results.

Pool Calculator provides a complete tool kit to make pool care easy.  You get:
•	Chemical Calculator
•	Pool Volume Calculator
•	Chemical Effects (What-if) Calculator


CHEMICAL CALCULATORS
You can use whichever test strip or test kit you prefer for testing your pool or hot tub.  Pool Calculator provides calculations for:
- Chlorine (FCl)
- Raising pH
- Lowering pH
- Total alkalinity (TA)
- Calcium hardness (CH)
- Stabilizer (CYA or cyanuric acid)
- Salt
- Borate (Borax)
- Calcium saturation index (CSI, similar to LSI)

RECOMMENDED CHEMICAL RANGES- USE OURS OR DECIDE YOUR OWN
With Pool Calculator, the recommended ranges for your chemicals are based upon whether you have a pool or hot tub, and the surface material (plaster, vinyl or fiberglass) of your pool or hot tub.  You can choose from several pre-defined ranges or customize based on your or your pool pro’s preferences.

POOL VOLUME CALCULATOR
To keep your swimming pool or hot tub at its best, it’s important that you accurately calculate your water volume. All of the chemical balancing recommendations you receive from the Pool Calculator are based on it. You can calculate the volume of your pool in metric units (liters) or in imperial units (gallons).   The Pool Volume Calculator can be used for:
•	Rectangular Pools and Hot Tubs
•	Oval Pools and Hot Tubs
•	Round Pools and Hot Tubs

CHEMICAL EFFECTS CALCULATOR
“What if” analysis for adding chemicals to your pool or hot tub!  Ever want to know the impact of adding a given amount of Chemical has on your swimming pool or hot tub chemistry? 

The Chemical Effects Calculator calculates the impact adding a specific amount of chemical has on your pool chemistry.  It does this not only for the primary purpose of the chemical, but also on the other important measurements for your pool.  For example, adding Trichlor not only raises your Free Chlorine, it also increases your Cyanuric Acid, lowers your pH and increases your Salt.  Adding Cal Hypo raises Free Chlorine, and also raises Calcium Hardness (CH)  and Salt.

With the Chemical Effects Calculator, you can measure the effects on pool chemistry of adding a given dose of:
•	Bleach
•	Trichlor
•	Dichlor
•	Cal-hypo
•	Lithium Hypochlorite
•	Chlorine gas
•	Muriatic Acid
•	Dry Acid
•	Washing soda
•	Soda Ash
•	Borax
•	Sodium Tetraborate Pentahydrate
•	Boric Acid
•	Caustic Acid (lye)
•	Baking Soda
•	Calcium Chloride
•	Calcium Chloride dihydrate
•	Stabilizer
•	Liquid Stabilizer
•	Salt
  
PoolCalculator can be used for in ground or above ground pools, spas and hot tubs, chlorine or salt pools, and a broad range of surfaces. 
Running into problems? Let us know at support@poolcalculator.com!

## Pool Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/f8/97/21/f89721db-c621-ef99-014e-1e4602137a6e/ab56e7ff-7baf-4042-8a96-5e033ef3b3de_Pool_Calculator_Splashscreen_copy.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/9f/d0/7a/9fd07aee-3536-b95c-d0b8-38fadd5c07c5/Simulator_Screenshot_-_iPhone_14_Plus_-_2025-08-29_at_15.52.30.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c7/e7/93/c7e793dd-3117-69c5-8256-da2d50fe3c8d/Simulator_Screenshot_-_iPhone_14_Plus_-_2025-08-29_at_15.52.53.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/b3/57/a9/b357a923-5116-0d44-70a2-8dd4d34fb20e/Simulator_Screenshot_-_iPhone_14_Plus_-_2025-08-29_at_15.52.57.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/30/9c/65/309c65f2-4d6f-8f60-e5f6-6660f4beec7c/Simulator_Screenshot_-_iPhone_14_Plus_-_2025-08-29_at_15.53.04.png/1284x2778.png)

## Pool Rating Breakdown in United States
- 5 stars: 382 (61%)
- 4 stars: 123 (20%)
- 3 stars: 34 (5%)
- 2 stars: 18 (3%)
- 1 stars: 73 (12%)

## Pool Reviews in United States

### *---- "Scam"
Do not I mean do not give your credit card information especially from your apple wallet!!!!!! This has no contact information
-- Empiremind2, 2025-08-03

### ***** "Super useful"
A pool mai te ande essential for me.
-- TeresaK24, 2025-06-18

### ***** "Great app"
Has been a great teaching tool for me
-- pray for upsate, 2025-04-25

### ***-- "Don’t have the chemicals I use."
Bummer. I really loved this app at first, but now I’m confused and cannot find a way to contact the company to ask for help. Doesn’t feel good to pay for an app and then not be able to get support. When using the calculator, it has certain options in a drop down menu to choose from so you know what amounts to add. But my chemicals aren’t in the list and there’s no help I can see to convert. One example: my ph up is liquid potassium carbonate. But what is on the list for raising ph is washing soda, soda ash, and borax. I google and can’t find any link between what I have and what they’re listing. So I’m stuck. Not cool.
-- farbeyondme, 2024-09-05

### ****- "App suggestion"
App is great but I have a suggestion. Can you put a page in that allows us to change our tested amounts all at once without having to back in and out of each item?
When I’m testing I do all my tests and then go back to read results so it’s a pain to have to constantly switch pages
Otherwise the app is great!
-- Ligale Finloft, 2024-07-14

### *---- "Sad Trombone"
As I recall this app used to be da bomb. But now it doesn’t work well on iPad or iPhone. Same failure scenario, can’t do a test without it crashing, or can set a parameter and then not be able to change it. Using the back button brings you to a blank page and have to force quit if you have any suggestions I’d be happy to try it, but I’ve had to resort to one of those other offerings that are simply not as user friendly (well, crashing is not user friendly but I remember when it used to work.  I think it was a web app at the time )
-- xbasicx, 2024-05-04

### **--- "DO NOT BUY!"
Waste of money. Company is in Nigeria. Wonder how much experience they have with pools - and with pools in our latitude. 
Paid $5 for this app. 
- It does not allow addition of a second pool or spa even though the one added is called “first pool.”  
If you have two units, the size must be reentered for each one if a different one is tested next. 
- And there is no tracking of history. Each test is entered separately with treatment suggestions given for that one instance. 
No way to know what I did last week or last month. 
-Have two stars because it does calculate pool size and gives suggestions based on the chemicals you buy (assuming “washing soda” is the same as sodium bicarbonate or baking soda).
-- AzBlestmom, 2023-11-01

### ***** "Lifesaver"
Moved to the country and built a pool.  No one wants to come out and service it because the round trip is too long.  This has been an incredible tool. First time pool owner.  I have a sparkling blue pool all summer long!! Highly recommend!!!
-- jojoOats, 2023-09-27

### *---- "Fair but lots of room for improvement"
I am not sure how this app beats a piece of paper. I use an Excel spreadsheet to track my testing results and chemicals to be added to the pool. My objective is to develop charts to show the apparent interaction over time between chemical changes Ph, Cl, ALK etc. This app doesn’t appear to keep any records to compare one week vs the next. So I ask, why not us s piece of paper. This is junk.
-- chipztaughts, 2023-07-26

### ***-- "Data entry"
After entering data  for FC I select done; it reveal a ; it takes me to the main data screen then show no data has been entered. Unless you enter 1-5 it doesn’t save the information you entered it instead shows invalid number entered error. I wish my free Chlorine was between 1 to 5 ppm but it’s not.
-- RedSloth, 2023-07-04

### **--- "Water temperature missing"
Are use this for a few years now, and I’d give it five stars however, this new version has deleted water temperature setting which affects balancing of chemicals.
-- Chrisl276245, 2023-06-24

### ***-- "Update Bleach Percentage"
The only gripe I have is that it doesn’t have the new 7.5% Clorox Disinfecting Bleach as an option in the “Effects” tab. If this gets updated it’s an easy 5 Star App.
-- InfiniteArchive, 2023-06-15

### ****- "Covers All Bases"
The App is great. It also me to use alternative chemistry in my pool. I don’t have to buy chemicals from a “pool” store. I mostly shop the grocery store and the local big box stores.
-- Thudlow, 2023-04-19

### **--- "Update is not good"
All my old data got erased and the new app update simply does not work. I’m super disappointed.
-- Steinar Knutsen, 2023-03-26

### *---- "Update Broke the Calculator"
After the recent update, it seems impossible to update the volume calculation.  The keyboard hides any of the other tabs at the bottom and there’s no way to dismiss the keyboard.
-- manfromlaramie, 2023-03-13

### ***-- "The app used to be a 5 star app"
Since the recent updates the app has become harder to use, and they have taken away from the app the most important reading for pool pros - the “Borate” testing option is no longer available on the app.. but is on the website? Does not make sense. There is also no contact form on the website, and app support takes you to the same website where there is no contact option.

New look is not appealing or helpful in any way. Revert the app back to the way it was.
-- Borgoredad, 2023-03-07

### *---- "Worthless"
I paid for it and I get nothing a blank screen. Worthless app
-- rothy9669, 2023-02-25

### *---- "Latest update made app useless"
Loved this app until the recent update. Virtually nothing works with it. Horrible! Had to go find another app.
-- jkw564, 2023-01-28

### *---- "It stopped working with recent update."
I’ve been using this calculator for a couple years to quickly determine how much chemicals to add to my hot tub. 

Since the recent update it’s just a blank screen that says “pool ready”.

¯\_(ツ)_/¯
I guess I’ll go find another app.
-- Slowjams, 2023-01-20

### *---- "Done button when editing number broken"
The keyboard doesn’t collapse when hitting done
-- blue.moola, 2023-01-17

[View all Pool reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews)


## Pool Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | United States | Lifestyle | #22 |
| Top Paid | United Kingdom | Lifestyle | #50 |
| Top Paid | Dominican Republic | Lifestyle | #78 |
| Top Paid | New Zealand | Lifestyle | #81 |
| Top Paid | Philippines | Lifestyle | #88 |
| Top Paid | South Africa | Lifestyle | #92 |
| Top Paid | Lebanon | Lifestyle | #93 |
| Top Paid | Portugal | Lifestyle | #94 |
| Top Paid | Canada | Lifestyle | #124 |
| Top Paid | Saudi Arabia | Lifestyle | #141 |
| Top Paid | Australia | Lifestyle | #145 |
| Top Paid | Indonesia | Lifestyle | #145 |
| Top Paid | United Arab Emirates | Lifestyle | #145 |
| Top Paid | Greece | Lifestyle | #157 |
| Top Paid | Thailand | Lifestyle | #160 |
| Top Paid | Colombia | Lifestyle | #164 |
| Top Paid | Peru | Lifestyle | #188 |
| Top Paid | Chile | Lifestyle | #195 |
| Top Paid | Israel | Lifestyle | #196 |
| Top Paid | Sweden | Lifestyle | #196 |
| Top Paid | Azerbaijan | Lifestyle | #197 |
| Top Paid | Hungary | Lifestyle | #197 |
| Top Paid | Malaysia | Lifestyle | #199 |
| Top Paid | Mexico | Lifestyle | #200 |
| Top Paid | Czechia | Lifestyle | #203 |
| Top Paid | Kuwait | Lifestyle | #204 |
| Top Paid | Belgium | Lifestyle | #206 |
| Top Paid | Kazakhstan | Lifestyle | #215 |
| Top Paid | Denmark | Lifestyle | #215 |
| Top Paid | Ireland | Lifestyle | #220 |
| Top Paid | Spain | Lifestyle | #232 |
| Top Paid | Argentina | Lifestyle | #238 |
| Top Paid | Nigeria | Lifestyle | #240 |
| Top Paid | Singapore | Lifestyle | #242 |
| Top Paid | Norway | Lifestyle | #268 |
| Top Paid | India | Lifestyle | #271 |
| Top Paid | Finland | Lifestyle | #278 |
| Top Paid | Egypt | Lifestyle | #299 |
| Top Paid | Ecuador | Lifestyle | #303 |
| Top Paid | Brazil | Lifestyle | #313 |
| Top Paid | Hong Kong SAR China | Lifestyle | #316 |
| Top Paid | Ukraine | Lifestyle | #330 |
| Top Paid | Netherlands | Lifestyle | #336 |
| Top Paid | Italy | Lifestyle | #337 |
| Top Paid | Austria | Lifestyle | #341 |
| Top Paid | Poland | Lifestyle | #341 |
| Top Paid | France | Lifestyle | #354 |
| Top Paid | Türkiye | Lifestyle | #355 |
| Top Paid | Russia | Lifestyle | #407 |
| Top Paid | Romania | Lifestyle | #411 |
| Top Paid | Taiwan | Lifestyle | #467 |
| Top Paid | United States | Overall | #478 |

## Pool Discovered Keywords
- pool
- calculator
- the calculator
- offline pool
- calculator for iphone

## Apps Similar to Pool
- [My Books Read](https://apptail.io/app/my-books-read-LMec/united-states)
- [Pool Water Calculator](https://apptail.io/app/pool-water-calculator-ymDc/united-states)
- [WaterLink Solutions PRO](https://apptail.io/app/waterlink-solutions-pro-BmDc/united-states)
- [WaterLink Solutions Home](https://apptail.io/app/waterlink-solutions-home-crFc/united-states)
- [Taylor® sureTREAT®](https://apptail.io/app/taylor-suretreat-gwxp/united-states)
- [Pool Care by Swim University](https://apptail.io/app/pool-care-by-swim-university-HMgq/united-states)
- [First Timers](https://apptail.io/app/first-timers-Dsov/united-states)
- [Countdown Widgets - Sincey](https://apptail.io/app/countdown-widgets-sincey-GcMv/united-states)
- [Event Countdown: ToMoment](https://apptail.io/app/event-countdown-tomoment-joFw/united-states)
- [Life Time Left: 4K Weeks](https://apptail.io/app/life-time-left-4k-weeks-UaGw/united-states)

## Pool Available In
- [United States](https://apptail.io/app/pool-calculator-Esad/united-states)
- [United Kingdom](https://apptail.io/app/pool-calculator-Esad/united-kingdom)
- [Canada](https://apptail.io/app/pool-calculator-Esad/canada)
- [Australia](https://apptail.io/app/pool-calculator-Esad/australia)
- [New Zealand](https://apptail.io/app/pool-calculator-Esad/new-zealand)
- [Thailand](https://apptail.io/app/pool-calculator-Esad/thailand)
- [South Africa](https://apptail.io/app/pool-calculator-Esad/south-africa)
- [Ireland](https://apptail.io/app/pool-calculator-Esad/ireland)
- [Belgium](https://apptail.io/app/pool-calculator-Esad/belgium)
- [Greece](https://apptail.io/app/pool-calculator-Esad/greece)
- [Spain](https://apptail.io/app/pool-calculator-Esad/spain)
- [Dominican Republic](https://apptail.io/app/pool-calculator-Esad/dominican-republic)
- [Algeria](https://apptail.io/app/pool-calculator-Esad/algeria)
- [Ecuador](https://apptail.io/app/pool-calculator-Esad/ecuador)
- [Egypt](https://apptail.io/app/pool-calculator-Esad/egypt)
- [Finland](https://apptail.io/app/pool-calculator-Esad/finland)
- [Hong Kong SAR China](https://apptail.io/app/pool-calculator-Esad/hong-kong)
- [Hungary](https://apptail.io/app/pool-calculator-Esad/hungary)
- [Indonesia](https://apptail.io/app/pool-calculator-Esad/indonesia)
- [Israel](https://apptail.io/app/pool-calculator-Esad/israel)
- [India](https://apptail.io/app/pool-calculator-Esad/india)
- [Italy](https://apptail.io/app/pool-calculator-Esad/italy)
- [Japan](https://apptail.io/app/pool-calculator-Esad/japan)
- [South Korea](https://apptail.io/app/pool-calculator-Esad/south-korea)
- [Kuwait](https://apptail.io/app/pool-calculator-Esad/kuwait)
- [Kazakhstan](https://apptail.io/app/pool-calculator-Esad/kazakhstan)
- [Lebanon](https://apptail.io/app/pool-calculator-Esad/lebanon)
- [Madagascar](https://apptail.io/app/pool-calculator-Esad/madagascar)
- [Mexico](https://apptail.io/app/pool-calculator-Esad/mexico)
- [Malaysia](https://apptail.io/app/pool-calculator-Esad/malaysia)
- [Nigeria](https://apptail.io/app/pool-calculator-Esad/nigeria)
- [Norway](https://apptail.io/app/pool-calculator-Esad/norway)
- [Peru](https://apptail.io/app/pool-calculator-Esad/peru)
- [Philippines](https://apptail.io/app/pool-calculator-Esad/philippines)
- [Pakistan](https://apptail.io/app/pool-calculator-Esad/pakistan)
- [Portugal](https://apptail.io/app/pool-calculator-Esad/portugal)
- [Paraguay](https://apptail.io/app/pool-calculator-Esad/paraguay)
- [Romania](https://apptail.io/app/pool-calculator-Esad/romania)
- [Russia](https://apptail.io/app/pool-calculator-Esad/russia)
- [Saudi Arabia](https://apptail.io/app/pool-calculator-Esad/saudi-arabia)
- [Singapore](https://apptail.io/app/pool-calculator-Esad/singapore)
- [United Arab Emirates](https://apptail.io/app/pool-calculator-Esad/united-arab-emirates)
- [Türkiye](https://apptail.io/app/pool-calculator-Esad/turkey)
- [Taiwan](https://apptail.io/app/pool-calculator-Esad/taiwan)
- [Ukraine](https://apptail.io/app/pool-calculator-Esad/ukraine)
- [Vietnam](https://apptail.io/app/pool-calculator-Esad/vietnam)
- [Slovenia](https://apptail.io/app/pool-calculator-Esad/slovenia)
- [Argentina](https://apptail.io/app/pool-calculator-Esad/argentina)
- [Azerbaijan](https://apptail.io/app/pool-calculator-Esad/azerbaijan)
- [Brazil](https://apptail.io/app/pool-calculator-Esad/brazil)
- [Belarus](https://apptail.io/app/pool-calculator-Esad/belarus)
- [Belize](https://apptail.io/app/pool-calculator-Esad/belize)
- [Switzerland](https://apptail.io/app/pool-calculator-Esad/switzerland)
- [Chile](https://apptail.io/app/pool-calculator-Esad/chile)
- [China](https://apptail.io/app/pool-calculator-Esad/china)
- [Colombia](https://apptail.io/app/pool-calculator-Esad/colombia)
- [Germany](https://apptail.io/app/pool-calculator-Esad/germany)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*