# DoCube vs 波子记单

The clearest difference is rating: DoCube at 4.6 against 波子记单's 4.0. DoCube also leads on ratings volume (11 vs 1) and update cadence (every 3 weeks vs every 2 months). 波子记单's advantage is iOS requirement (13.0 vs 17.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. DoCube sells 1 one-off in-app purchase and 波子记单 sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

DoCube holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: DoCube has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

DoCube ships an update every 3 weeks, 波子记单 every 2 months. The most recent releases landed on October 6, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | DoCube | 波子记单 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (11 ratings)](https://appshunter.io/ios/app/docube-pdf-reader-and-notes/id6470183496/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/id6757109059/reviews) |
| Number of ratings | **11** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 91 MB | 36 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [巍 赵](https://appshunter.io/developer/1686869575) | [国民 谢](https://appshunter.io/developer/1551522829) |

## What reviewers say

### DoCube

[App page](https://appshunter.io/ios/app/docube-pdf-reader-and-notes/id6470183496)

This app transforms reading into knowledge retention with features like multi-tab browsing, precise document navigation, and versatile annotation tools. It supports various formats and converts highlights into flashcards for effective memorization and review.

**Highlights:** Multi-tab reading for multiple documents, Precise document positioning and history navigation, Support for PDF, EPUB, Markdown, and web pages, Six annotation tools including highlights and notes, Cross-document linking for knowledge networks, Automatic flashcard creation from highlights, AI-enhanced card generation

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full-platform Professional Edition | $34.99 | one-time |


### 波子记单

[App page](https://appshunter.io/ios/app/id6757109059)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $1.99 | per month |
| 年度会员 | $12.99 | per year |
| 永久会员 | $24.99 | one-time |


## Frequently asked questions

### Is DoCube free?

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

### Is 波子记单 free?

波子记单 is free to download, with in-app purchases available.

### Which has better reviews, DoCube or 波子记单?

DoCube is rated higher. DoCube averages 4.6 out of 5 from 11 ratings, while 波子记单 averages 4.0 from 1 ratings.

### Do DoCube or 波子记单 have ads?

Neither DoCube nor 波子记单 shows ads.

### Which is updated more often, DoCube or 波子记单?

DoCube ships an update every 3 weeks, and 波子记单 every 2 months. Most recently, DoCube was updated on October 6, 2026 and 波子记单 on October 18, 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.*