# PureMarkdown vs Lumen

The clearest difference is device support: PureMarkdown at 3 against Lumen's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 19, 2026 and June 28, 2026 respectively.

## The numbers

| Metric | PureMarkdown | Lumen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/lumen-knowledge-browser/id6762682475/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | — | Free |
| Size | 3 MB | 28 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [zeyang huang](https://appshunter.io/developer/1449351308) | [Daniel Kosukhin](https://appshunter.io/developer/1852657475) |

## What reviewers say

### PureMarkdown

[App page](https://appshunter.io/ios/app/puremarkdown/id6761775336)

**Features:** Vision Pro support

**In-app purchases:** none


### Lumen

[App page](https://appshunter.io/ios/app/lumen-knowledge-browser/id6762682475)

This app acts as a browser that remembers what you read, building a personal knowledge base from engaged pages. It allows you to ask questions in plain English about your reading history, with answers generated by an on-device AI. All your data remains private and offline.

**Highlights:** On-device AI knowledge base, Plain English questioning, Automatic content organization, Private and offline browsing, Tracker blocking, Source citation for answers

**In-app purchases:** none


## Frequently asked questions

### Is PureMarkdown free?

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

### Is Lumen free?

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

### Do PureMarkdown or Lumen have ads?

Neither PureMarkdown nor Lumen shows ads.

### Which is updated more often, PureMarkdown or Lumen?

PureMarkdown ships an update every 2 weeks, and Lumen every 2 weeks. Most recently, PureMarkdown was updated on September 19, 2026 and Lumen on June 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*