Orenda

Orenda

Pool Calculator and Education

473 ratings
86 reviews
Free

Details

  • Released
  • Updated
  • December 9, 2016
  • August 17, 2026

Features

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About

This app helps you master pool chemistry by accurately calculating chemical dosages and balancing water based on the LSI. It offers a user-friendly experience for both novices and professionals, including a volume estimator and educational videos.

Chemical dosing calculator
LSI water balancing
Pool volume estimator
User-friendly interface
Educational videos
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What users say

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What's New in Orenda

6.1.2

August 17, 2026

Minor adjustments

User reviews

Game changer!

The title says it all. I maintain my own pool, and despite the salt cell and muriatic acid pump automation, if you don’t know or understand your water quality numbers of how the system actually works things can quickly take a turn for the worse. This app makes it SO EASY to dial in my numbers and maintain a healthy LSI. No more laser focus on maintaining a PH of 7.2 - 7.6, and no more lack of understanding TA and ORP and how the salt cell works. Thanks to this app and the great blogs on the Orenda website, I’m now a master of my pool and not a slave to it. The only reason it doesn’t get five stars is that it doesn’t have a historic function. Being able to save all of my test readings by date so I can go back and refer to the historical data would make the app perfect. Orenda, please add this functionality! :-)
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Orenda is great!

I live Orenda, but there are a few things I would change. First, I would add in a calculation for how to adjust a pool with too much chlorine by adding sodium Thiosulfate. This is a needed calculation. Also, I would list IN ORDER what chemicals to put in and how to apply them. At no time should Soda Ash be applied prior to Sodium Bicarbonate, however Soda Ash appears first in some cases, which also affects pH… there should be a “how to” section that explains how to put the chemicals in for newer pool cleaners.
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Homeowner

Very simple to use for a novice pool owner

Good tool to have

Makes pool care simple and keeps system working longer

The best pool app, period.

Absolutely the best app to manage your pool the right way, and supported by great educational material on the Orenda web site and if you want, a great selection of chemicals that are mentioned but not really pushed.

To bad one cannot keep a
history in it. I use the PoolMath app for that, which is otherwise not-too-distant but second to the Orenda app.
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Developer apps

User experience

🐞

Reported Bugs

4 issues

Desired levels changing when inputting current values

Bug

Metric system not functioning as expected

Bug

Slider feature for inputting readings is slow and frustrating

Bug

App not optimized for all iPhone screen sizes

Bug

Requested Features

5 requests

Ability to save pool volume and desired levels

Feature

Option to log pool history and track trends

Feature

Integration with pool chemical monitors

Feature

Ability to set custom chemical concentrations

Feature

Support for more languages (e.g., Chinese)

Feature

FAQ

What does the Orenda app do?

The Orenda app is a swimming pool calculator designed to help users master pool chemistry. It accurately calculates chemical dosages and balances water according to the LSI, making pool chemistry easier for both novices and professionals.

What are the key features of Orenda?

Key features include a chemical dosing calculator, LSI water balancing, a pool volume estimator, a user-friendly interface, and access to educational videos within the app.

Is Orenda free to use?

Yes, the Orenda app is free to use. It does not have in-app purchases or advertisements.

Who is the Orenda app for?

This app is ideal for anyone who owns or maintains a swimming pool, including novice pool owners and professional pool operators, who want to ensure accurate chemical dosing and balanced water chemistry.