# Kortext vs Vellumark

The clearest difference is in-app purchases: Kortext at none against Vellumark's 3. Kortext also leads on chart position (#158 vs unranked) and device support (3 vs 1). Vellumark's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Vellumark sells 3 in-app purchases, starting at $6.99 per month. Kortext asks for nothing beyond the download.

Kortext ships an update every 2 months, Vellumark every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Kortext | Vellumark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (1.4K ratings)](https://appshunter.io/ios/app/kortext/id1030400150/reviews)** | — |
| Number of ratings | **1.4K** | — |
| Positive reviews | 17.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Best chart rank | **#158** | — |
| Size | 38 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Kortext](https://appshunter.io/developer/882766054) | [Yue Qiu](https://appshunter.io/developer/1889483214) |

## What reviewers say

### Kortext

[App page](https://appshunter.io/ios/app/kortext/id1030400150)

**Currently charting:** #158 Top Free · Book (US App Store)

Access and read eBooks from various publishers with enhanced multimedia. Tools are included to help learners and academics engage with their content, offering features like note-taking, referencing, and text-to-speech.

**Highlights:** Read PDF and EPUB files, Access 13,000+ free eTextbooks, Highlight text and create notes, Add Harvard/APA references, Read Aloud functionality, Adjust text size and background, Search within books, 500MB free cloud storage

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 💡 Helpful features like highlighting and note-taking
- 👍 Convenient to access textbooks on the go
- 🚀 Efficient for studying

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🐛 Unreliable performance
- 🐛 Overlapping text and pages
- 🐛 Inconsistent navigation and page turning
- 🐛 Laggy and slow

**Reported bugs**

- Frequent crashes and freezes
- Pages not loading properly
- Highlighting and annotations not saving
- Login issues and inability to access content

**Requested features**

- Improved text-to-speech functionality
- Better organization and navigation of content
- Ability to customize text size and layout
- Syncing across multiple devices
- Offline reading mode


### Vellumark

[App page](https://appshunter.io/ios/app/vellumark/id6761415647)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vellumark Pro Monthly | $6.99 | per month |
| Vellumark Pro for 3 months | $14.99 | per 3 months |
| Vellumark Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is Kortext free?

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

### Is Vellumark free?

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

### Do Kortext or Vellumark have ads?

Neither Kortext nor Vellumark shows ads.

### Which is updated more often, Kortext or Vellumark?

Kortext ships an update every 2 months, and Vellumark every 3 weeks. Most recently, Kortext was updated on October 24, 2026 and Vellumark on October 24, 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.*