# Refrigerants Quick Guide vs Project Gutenberg Ebooks

The clearest difference is in-app purchases: Refrigerants Quick Guide at none against Project Gutenberg Ebooks's 3. Refrigerants Quick Guide also leads on iOS requirement (11.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Project Gutenberg Ebooks sells 3 in-app purchases, starting at $4.99 per 7 days. Refrigerants Quick Guide asks for nothing beyond the download.

## The numbers

| Metric | Refrigerants Quick Guide | Project Gutenberg Ebooks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (82 ratings)](https://appshunter.io/ios/app/project-gutenberg-ebooks/id6755909445/reviews)** |
| Number of ratings | — | **82** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 22 MB | 41 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [UNEP](https://appshunter.io/developer/1106793919) | [Natalja Morozova](https://appshunter.io/developer/1852342078) |

## What reviewers say

### Refrigerants Quick Guide

[App page](https://appshunter.io/ios/app/refrigerants-quick-guide/id1546381749)

**Features:** macOS Compatibility

**In-app purchases:** none


### Project Gutenberg Ebooks

[App page](https://appshunter.io/ios/app/project-gutenberg-ebooks/id6755909445)

Access and read thousands of public domain ebooks from Project Gutenberg. This app offers a customizable reader, smart search, offline access, and annotation tools for a personalized reading experience.

**Highlights:** Thousands of public domain ebooks, Smart ebook search and filtering, Offline reading capability, Ebook annotations and notes, Customizable reader with themes, Multi-language support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Monthly Premium | $9.99 | per month |
| Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is Refrigerants Quick Guide free?

Refrigerants Quick Guide is free to download, with no in-app purchases.

### Is Project Gutenberg Ebooks free?

Project Gutenberg Ebooks is free to download, with in-app purchases available.

### Do Refrigerants Quick Guide or Project Gutenberg Ebooks have ads?

Neither Refrigerants Quick Guide nor Project Gutenberg Ebooks shows ads.

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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.*