# pH-Alkalinity Adjustment Tool — pH-Alkalinity Adjustment Tool > Calculates exact chemical doses for pool pH and alkalinity adjustment. (iPhone/iPad app by Hasa, Inc..) - Source: https://appshunter.io/ios/app/ph-alkalinity-adjustment-tool/id1527031215 (this page in markdown: same URL + `.md`) - Developer: [Hasa, Inc.](https://appshunter.io/developer/1713193810) - Category: Lifestyle, Health & Fitness - Price: $7.99 - Rating: 3.67/5 from 3 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 9 MB - Languages: English - Released: 2020-11-04 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/ph-alkalinity-adjustment-tool/id1527031215/reviews.md ## What is pH? The pH – Alkalinity Adjustment Tool is an incredibly accurate tool for adjusting pH and total alkalinity up or down in swimming pools. In the past, you had four choices for making adjustments to pH and alkalinity: 1. Guess an amount of chemical to add, wait for thorough mixing and retest the water in 1-4 hours to see what it did 2. Make an Acid or Base Demand Test to determine the amount of acid or base by counting drops, looking up the amount in a table, and then adding it. But this only makes the pH 7.5 and does not tell you what the new alkalinity will be after the addition 3. Calculate the amount of alkalinity increase or decrease, add the chemical dose, wait for mixing, and then see what the new pH is 4. Use an app or water analyzer that supposedly gives correct chemical amounts but only gives an amount for pH or alkalinity adjustment None of these methods are acceptable or accurate and they require waiting and retesting. Now with the pH – Alkalinity Adjustment Tool, you input the pool volume and water conditions and it calculates the exact amount of chemicals to add to reach either a Target Alkalinity (and it provides you with a new pH) or to reach a Target pH (and it provides a new Alkalinity). We call this pH Priority and Alkalinity Priority. You enter Pool Volume and levels for CYA, Borate, Calcium Hardness, Salt or TDS, and Temperature on the first screen. Then on the second screen, you enter Current pH and Current Alk in the yellow cells near the top and then enter Target pH in the yellow cell in the red pH Priority Section and Target Alkalinity in the yellow cell in the green Alkalinity Priority section. You instantly see the chemical amounts needed for obtaining either pH Priority (red section) or Alkalinity Priority (green section). There is also a note below the green section stating that when alkalinity is on Target and pH is less than 7.5, aerate and cause turbulence to only raise pH. By doing this you can get pH 7.5 and Alkalinity of 90 ppm. So, you can choose whichever Priority you want – pH or alkalinity. You can also change Targets to see what it will do. The Conditions on the first screen can be changed also to see what effect they will have on pH and alkalinity. Changing any condition on the first screen will change dose amounts and New pH and New Alk on screen 2. Changing Target pH will change the chemical dose amounts and the New Alk. Changing Target Alk will change the chemical dose amounts and the New pH. The pH – Alkalinity Adjustment Tool is an accurate and easy way to know what chemicals are needed to achieve perfect water balance. You can decide what Targets you want for pH and alkalinity and it will calculate everything for you. No more guessing and testing to see what changed. No more under or over-dosing. Save money by knowing the exact doses of chemicals and what they will do to pH and alkalinity. The pH – Alkalinity Adjustment Tool is different from the Pool Acid Dose Calculator because the Pool Acid Dose Calculator only works for lowering pH and alkalinity and only from Current pH 7.6 to 8.2, Current Alkalinity from 70 to 220 ppm with a Desired pH from 6.0 to 8.1 and CYA of 0, 30, 50 or 100 ppm and Borate of 0, 30 and 50 pm. It also has 0.1 limits for all conditions. The pH – Alkalinity Adjustment Tool works for any current or starting pH and alkalinity, any CYA, any borate, any calcium hardness, any TDS, any temperature with any Target pH or alkalinity, and it works for raising or lowering both with an accuracy of 0.01. It is also much more accurate than the Pool Acid Dose Calculator because it uses all sources of hydrogen ion (H+) in the water. There is no other tool like this available for the pool and spa industry. ## Key features - Calculates exact chemical doses - pH Priority adjustment - Alkalinity Priority adjustment - Input pool volume and water conditions - See new pH and alkalinity levels - Eliminates guesswork and retesting ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/ph-alkalinity-adjustment-tool/id1527031215/reviews.md ### 3/5 — I like it! *2024-03-16* Very useful and to the point. The white text on the yellow background has to go! A change to black text would be a simple fix. Thank you for thinking this through as it covers the basic science, not seen in other apps. ### 3/5 — Could be better *2020-12-28* I’m slightly color blind. So the yellows and greens I can hardly tell apart. But the worst part is the white lettering inside the yellow/green colored boxes. If they were black I could read those and deal with the other. Until that gets fixed I doubt I’ll use this app. ## Frequently asked questions about pH ### What is the pH-Alkalinity Adjustment Tool? The pH-Alkalinity Adjustment Tool is a paid application designed to help users accurately calculate the exact amounts of chemicals needed to adjust the pH and total alkalinity of their swimming pools. It offers two priority modes: pH Priority and Alkalinity Priority, allowing users to target specific levels for either parameter. ### How does the pH-Alkalinity Adjustment Tool work? Users input their pool's volume, current water conditions (like CYA, Borate, Calcium Hardness, Salt/TDS, and Temperature), current pH, and current alkalinity. They then set their desired Target pH and Target Alkalinity. The tool instantly calculates the precise chemical doses required to achieve these targets. ### Can the pH-Alkalinity Adjustment Tool help me save money? Yes, by providing exact chemical doses, the tool helps prevent over-dosing or under-dosing of chemicals. This accuracy ensures you use only the necessary amount of chemicals, leading to cost savings on pool maintenance supplies. ### What are the pH Priority and Alkalinity Priority modes? pH Priority allows you to set a target pH and the tool will calculate the resulting alkalinity. Alkalinity Priority allows you to set a target alkalinity, and the tool will calculate the resulting pH. You can choose which parameter is more critical for your pool at any given time. ### Does the pH-Alkalinity Adjustment Tool have ads? No, the pH-Alkalinity Adjustment Tool does not contain advertisements. It is a paid application that provides an ad-free experience for its users. ### What devices is the pH-Alkalinity Adjustment Tool available on? The pH-Alkalinity Adjustment Tool is available for iPhone, iPad, and iPod touch devices. It is designed for iOS users. ### How often is the pH-Alkalinity Adjustment Tool updated? The pH-Alkalinity Adjustment Tool was last updated on November 4, 2020, with version 1.0. Information on future update frequency is not provided. ### What is the price of the pH-Alkalinity Adjustment Tool? The pH-Alkalinity Adjustment Tool is priced at $7.99. This is a one-time purchase for the application. ## Version history (last 1 release) ### 1.0 — 2020-11-04 No release notes. ## More apps by Hasa, Inc. - [Pool Acid Dose Calc](https://appshunter.io/ios/app/pool-acid-dose-calc/id711282054) - [Pool Chemical Dose Calculator](https://appshunter.io/ios/app/pool-chemical-dose-calculator/id1148385163) - [Orenda](https://appshunter.io/ios/app/orenda/id1171005221) - [HASA water](https://appshunter.io/ios/app/hasa-water/id6473078202) - [Hasa Pro Rewards](https://appshunter.io/ios/app/hasa-pro-rewards/id6751251252) All apps by Hasa, Inc.: https://appshunter.io/developer/1713193810 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*