# DoCube vs Open Minis

The clearest difference is in-app purchases: Open Minis at none against DoCube's 1. Open Minis also leads on rating (4.9 vs 4.6) and update cadence (weekly vs every 3 weeks). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. DoCube sells 1 one-off in-app purchase. Open Minis asks for nothing beyond the download.

Open Minis holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Open Minis has 71 ratings behind it against 11, so its average is the more settled of the two. Written reviews complicate that: 100% of DoCube's written reviews are positive against 97% of Open Minis's, so the app with the better star average is not the one people write more warmly about.

DoCube ships an update every 3 weeks, Open Minis weekly. The most recent releases landed on September 5, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | DoCube | Open Minis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (11 ratings)](https://appshunter.io/ios/app/docube-pdf-reader-and-notes/id6470183496/reviews) | **[4.9 (71 ratings)](https://appshunter.io/ios/app/open-minis/id6759188481/reviews)** |
| Number of ratings | 11 | **71** |
| Positive reviews | **100.0% of reviews** | 96.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 91 MB | 124 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [巍 赵](https://appshunter.io/developer/1686869575) | [森 王](https://appshunter.io/developer/1522405790) |

## 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 |


### Open Minis

[App page](https://appshunter.io/ios/app/open-minis/id6759188481)

This AI agent runs locally on your device, taking actions like browsing the web, managing your schedule, and controlling smart home devices. It integrates deeply with iOS frameworks and allows you to bring your own API keys from various AI providers. Customize its capabilities with a skills system and enjoy persistent memory for a personalized experience.

**Highlights:** On-device AI agent, Multi-model AI provider support, Deep iOS framework integration, Built-in web browser, Customizable skills system, Persistent memory, Siri Shortcuts integration

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

**In-app purchases:** none


## Frequently asked questions

### Is DoCube free?

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

### Is Open Minis free?

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

### Which has better reviews, DoCube or Open Minis?

Open Minis is rated higher. DoCube averages 4.6 out of 5 from 11 ratings, while Open Minis averages 4.9 from 71 ratings.

### Do DoCube or Open Minis have ads?

Neither DoCube nor Open Minis shows ads.

### Which is updated more often, DoCube or Open Minis?

DoCube ships an update every 3 weeks, and Open Minis weekly. Most recently, DoCube was updated on September 5, 2026 and Open Minis on September 22, 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.*