# Orenda vs HydroApps

The clearest difference is ratings volume: Orenda at 476 against HydroApps's 10. Orenda also leads on review sentiment (83% vs 67%). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.7 for Orenda against 4.8 for HydroApps. That said, the two scores are not equally well evidenced: Orenda has 476 ratings behind it against 10, so its average is the more settled of the two. Written reviews are what separate them: 83% of Orenda's written reviews are positive against 67% of HydroApps's.

Orenda ships an update monthly, HydroApps every 3 weeks. The most recent releases landed on October 11, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Orenda | HydroApps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (476 ratings)](https://appshunter.io/ios/app/orenda/id1171005221/reviews) | **[4.8 (10 ratings)](https://appshunter.io/ios/app/hydroapps/id6758952918/reviews)** |
| Number of ratings | **476** | 10 |
| Positive reviews | **82.8% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 78 MB | 48 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hasa Inc.](https://appshunter.io/developer/1713193810) | [Hydroapps](https://appshunter.io/developer/1875957664) |

## What reviewers say

### Orenda

[App page](https://appshunter.io/ios/app/orenda/id1171005221)

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.

**Highlights:** Chemical dosing calculator, LSI water balancing, Pool volume estimator, User-friendly interface, Educational videos

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 💡 Helpful for pool maintenance
- 🚀 Simplifies pool chemistry
- 👍 Provides valuable information
- 👍 Great educational resources

**What reviewers complain about**

- 🐛 Issues with updating desired levels
- 🐛 Metric system not working properly
- 🐛 Difficult to input readings
- 🐛 Lack of history/logging functionality

**Reported bugs**

- 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**

- 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)


### HydroApps

[App page](https://appshunter.io/ios/app/hydroapps/id6758952918)

This app digitizes operations for aquatic and recreation facilities, replacing paper logs with real-time data for inspections, water testing, and staff management. It enhances safety, efficiency, and accountability for teams of all sizes, providing powerful performance insights.

**Highlights:** Streamline inspections, Water testing management, Staff management, Real-time data logging, Performance insights, Compliance assurance

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Orenda free?

Orenda is free to download, with no in-app purchases.

### Is HydroApps free?

HydroApps is free to download, with no in-app purchases.

### Which has better reviews, Orenda or HydroApps?

HydroApps is rated higher. Orenda averages 4.7 out of 5 from 476 ratings, while HydroApps averages 4.8 from 10 ratings.

### Do Orenda or HydroApps have ads?

Neither Orenda nor HydroApps shows ads.

### Which is updated more often, Orenda or HydroApps?

Orenda ships an update monthly, and HydroApps every 3 weeks. Most recently, Orenda was updated on October 11, 2026 and HydroApps on September 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*