# Orenda vs SKIMMER

The clearest difference is rating: Orenda at 4.7 against SKIMMER's 1.0. Orenda also leads on update cadence (monthly vs every 22 months) and ratings volume (478 vs 2). SKIMMER's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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 1.0. That said, the two scores are not equally well evidenced: Orenda has 478 ratings behind it against 2, so its average is the more settled of the two.

Orenda ships an update monthly, SKIMMER every 22 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Orenda | SKIMMER |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (478 ratings)](https://appshunter.io/ios/app/orenda/id1171005221/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/skimmer/id6503935925/reviews) |
| Number of ratings | **478** | 2 |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 22 months |
| Monetization | Free | Free |
| Size | 78 MB | 10 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Hasa Inc.](https://appshunter.io/developer/1713193810) | [Taizhou Dibiao Technology Co., Ltd.](https://appshunter.io/developer/1750440268) |

## 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)


### SKIMMER

[App page](https://appshunter.io/ios/app/skimmer/id6503935925)

Control your pool skimmer's start, stop, and movement direction. Monitor device charging status and battery power directly from your mobile device.

**Highlights:** Control skimmer start/stop, Control skimmer movement direction, Display charging status, Display battery power

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Orenda free?

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

### Is SKIMMER free?

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

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

Orenda is rated higher. Orenda averages 4.7 out of 5 from 478 ratings, while SKIMMER averages 1.0 from 2 ratings.

### Do Orenda or SKIMMER have ads?

Neither Orenda nor SKIMMER shows ads.

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

Orenda ships an update monthly, and SKIMMER every 22 months. Most recently, Orenda was updated on October 26, 2026 and SKIMMER on October 25, 2026.

---

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