# HackLens vs Burn451

The clearest difference is in-app purchases: HackLens at none against Burn451's 2. HackLens also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Burn451 sells 1 in-app purchase, starting at $4.99 per month. HackLens asks for nothing beyond the download.

HackLens ships an update monthly, Burn451 every 2 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HackLens | Burn451 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (9 ratings)](https://appshunter.io/ios/app/burn451-read-later-and-save/id6759418544/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | — | Freemium |
| Size | 33 MB | 12 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Mac |
| Age rating | 12+ | 4+ |
| Developer | [Azz-eddine BERRAMOU](https://appshunter.io/developer/1860545158) | [国庆 沈](https://appshunter.io/developer/1878093288) |

## What reviewers say

### HackLens

[App page](https://appshunter.io/ios/app/hacklens-hacker-news-reader/id6756418153)

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

**In-app purchases:** none


### Burn451

[App page](https://appshunter.io/ios/app/burn451-read-later-and-save/id6759418544)

This app helps you manage your saved articles by automatically deleting them after a set time unless you explicitly keep them. It features AI summarization and a curated knowledge base for content that survives the deletion process.

**Highlights:** 24-hour countdown timer for saves, AI-summarized vault, Automatic content extraction, Clean reader mode, Markdown export, Cloud sync, MCP-ready Vault access

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Burn Pro Monthly | $4.99 | per month |


## Frequently asked questions

### Is HackLens free?

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

### Is Burn451 free?

Burn451 is free to download, with in-app purchases available.

### Do HackLens or Burn451 have ads?

Neither HackLens nor Burn451 shows ads.

### Which is updated more often, HackLens or Burn451?

HackLens ships an update monthly, and Burn451 every 2 weeks. Most recently, HackLens was updated on November 9, 2026 and Burn451 on October 31, 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.*