# 石油标准 vs ReadingUp

The clearest difference is review sentiment: ReadingUp at 83% against 石油标准's 30%. ReadingUp also leads on update cadence (every 2 days vs every 4 months). 石油标准's advantage is price (Free vs $1.99) and in-app purchases (none vs 3). On ads and device support there is nothing between them.

石油标准 is free to download; ReadingUp costs $1.99 up front. ReadingUp sells 3 in-app purchases, starting at $19.99 per month. 石油标准 asks for nothing beyond the download.

石油标准 ships an update every 4 months, ReadingUp every 2 days. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 石油标准 | ReadingUp |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 30.0% of reviews | **83.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 69 MB |
| Requires iOS | **12.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [石油工业出版社](https://appshunter.io/developer/1019225064) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## What reviewers say

### 石油标准

[App page](https://appshunter.io/ios/app/id1491424663)

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

**In-app purchases:** none


### ReadingUp

[App page](https://appshunter.io/ios/app/readingup/id6757276895)

This app offers a distraction-free e-book reading experience with support for multiple file formats. It features iCloud sync for cross-device progress, customizable reading settings, and tools for organizing notes and highlights. Enjoy a pure reading journey without ads.

**Highlights:** Supports EPUB, TXT, MOBI, WORD, PDF, iCloud sync for cross-device reading, Smart highlighting and note organization, Customizable fonts, backgrounds, and page-turning, Immersive mode for focused reading, Export notes as PDF, TXT, Markdown

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadingUp  Premium - monthly | $19.99 | per month |
| ReadingUp Premium - yearly | $49.99 | per year |
| ReadingUp Premium- lifetime | $89.99 | one-time |


## Frequently asked questions

### Is 石油标准 free?

石油标准 is free to download, with no in-app purchases.

### Is ReadingUp free?

ReadingUp costs $1.99, and also offers in-app purchases.

### Do 石油标准 or ReadingUp have ads?

Neither 石油标准 nor ReadingUp shows ads.

### Which is updated more often, 石油标准 or ReadingUp?

石油标准 ships an update every 4 months, and ReadingUp every 2 days. Most recently, 石油标准 was updated on October 26, 2026 and ReadingUp on October 28, 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.*