Orenda vs LSI Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Orenda
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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Master pool chemistry with the Orenda pool chemical dosing calculator. Measure pool chemicals accurately while balancing water chemistry according to the LSI. The Orenda App is a swimming pool calculator with a user friendly experience, and makes pool chemistry easier than ever. Try the new pool volume estimator and watch Orenda videos in the app. A pool chemical calculator that allows a novice to dose chemicals as accurately as a professional pool operator.
LSI Calculator
This app provides tools and educational resources to help users manage water systems, focusing on eco-friendly treatments for pools and spas. It aims to make water maintenance accessible to everyone, regardless of their experience level.
- Water science education
- Pool and spa water management
- Eco-friendly treatment guidance
- NSF/ANSI Certified product information
- Tools for water system management
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Next Generation Water Science makes water (and the people who maintain it) look great. Next Generation Water Science makes eco-friendly water treatments for pools, spas, industrial and agricultural water systems. All products are NSF/ANSI Certified for purity and safety. Through education and helpful tools like this mobile app, Next Generation Water Science has helped people of all aptitudes manage water better.
Screenshots
Verdict
The clearest difference is ratings volume: Orenda at 478 against LSI Calculator's 5. Orenda also leads on rating (4.7 vs 4.4). LSI Calculator's advantage is review sentiment (100% vs 82%) and iOS requirement (11.0 vs 15.0). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Orenda holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Orenda has 478 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 82% of Orenda's written reviews are positive against 100% of LSI Calculator's, so the app with the better star average is not the one people write more warmly about.
Orenda ships an update monthly, LSI Calculator every 2 months. Both last shipped on November 2, 2026.
| Parameter | Orenda | LSI Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (478 ratings) — better | 4.4 (5 ratings) |
| Positive reviews | 81.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 478 — better | 5 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 78 MB | 52 MB |
| Age rating | 4+ | 12+ |
| Developer | Hasa Inc. | Pure Planet Science & Technology, Inc. |
Customer experience
Orenda
LSI Calculator
Bugs and requests
Orenda
Reported bugs
4 issues- Desired levels changing when inputting current values
- Metric system not functioning as expected
- Slider feature for inputting readings is slow and frustrating
- App not optimized for all iPhone screen sizes
Requested features
5 requests- Ability to save pool volume and desired levels
- Option to log pool history and track trends
- Integration with pool chemical monitors
- Ability to set custom chemical concentrations
- Support for more languages (e.g., Chinese)
LSI Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Orenda
No in-app purchases
LSI Calculator
No in-app purchases
Questions
Is Orenda free?
Is LSI Calculator free?
Which has better reviews, Orenda or LSI Calculator?
Do Orenda or LSI Calculator have ads?
Which is updated more often, Orenda or LSI Calculator?
Other comparisons
