# Orenda vs Scrollogy

The clearest difference is in-app purchases: Orenda at none against Scrollogy's 1. Orenda also leads on ratings volume (476 vs 3) and device support (3 vs 1). Scrollogy's advantage is rating (5.0 vs 4.7) and update cadence (every 9 days vs monthly). On price and ads there is nothing between them.

Both are free to download. Scrollogy sells 1 in-app purchase, starting at $4.99 per month. Orenda asks for nothing beyond the download.

Scrollogy holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Orenda has 476 ratings behind it against 3, so its average is the more settled of the two.

Orenda ships an update monthly, Scrollogy every 9 days. The most recent releases landed on September 28, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Orenda | Scrollogy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (476 ratings)](https://appshunter.io/ios/app/orenda/id1171005221/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/scrollogy/id6778185225/reviews)** |
| Number of ratings | **476** | 3 |
| Positive reviews | 82.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 78 MB | 5 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Hasa Inc.](https://appshunter.io/developer/1713193810) | [Romario Jashari](https://appshunter.io/developer/6778185227) |

## 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)


### Scrollogy

[App page](https://appshunter.io/ios/app/scrollogy/id6778185225)

This app acts as a central hub for all your online discoveries, allowing you to save articles, videos, screenshots, links, and notes. It intelligently organizes your saved content, provides summaries, and enables you to search and ask questions about your saved items.

**Highlights:** Save links, screenshots, videos, articles, and notes, Search saved content in plain language, Ask questions about saved items, View summaries, tags, and connected saves, Rewind recent saves, Use share extension to save from other apps

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scrollogy Pro | $4.99 | per month |


## Frequently asked questions

### Is Orenda free?

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

### Is Scrollogy free?

Scrollogy is free to download, with in-app purchases available.

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

Scrollogy is rated higher. Orenda averages 4.7 out of 5 from 476 ratings, while Scrollogy averages 5.0 from 3 ratings.

### Do Orenda or Scrollogy have ads?

Neither Orenda nor Scrollogy shows ads.

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

Orenda ships an update monthly, and Scrollogy every 9 days. Most recently, Orenda was updated on September 28, 2026 and Scrollogy on September 19, 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.*