# Zettelkasten vs Axiom

The clearest difference is rating: Axiom at 5.0 against Zettelkasten's 3.0. Axiom also leads on update cadence (weekly vs monthly) and iOS requirement (15.0 vs 17.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Zettelkasten sells 2 in-app purchases, starting at $9.99 per 7 days and Axiom sells 4 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

Axiom holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Zettelkasten ships an update monthly, Axiom weekly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Zettelkasten | Axiom |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/zettelkasten-notes-graph/id6771281468/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/axiom-your-ai-second-brain/id6778582936/reviews)** |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Freemium | Freemium |
| Size | 6 MB | 82 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [Mithilkumar Shashikant Patel](https://appshunter.io/developer/6778583028) |

## What reviewers say

### Zettelkasten

[App page](https://appshunter.io/ios/app/zettelkasten-notes-graph/id6771281468)

This app creates a visual knowledge graph from your notes, allowing you to see and explore connections between ideas. It uses wiki-style linking and automatic backlinks to help you rediscover relationships and build a personal knowledge base without relying on traditional folders. Enjoy a private, ad-free experience where all your data stays on your device.

**Highlights:** Visual knowledge graph, Automatic backlinks, Wiki-style linking, Interactive orbit graph, Full-text search, Markdown export

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $9.99 | per 7 days |
| Yearly | $49.99 | per year |


### Axiom

[App page](https://appshunter.io/ios/app/axiom-your-ai-second-brain/id6778582936)

Organize thoughts, media, and archives into a unified cognitive workspace. This AI-powered tool transforms your inputs into structured, searchable insights and creates visual memory reels with AI narration. It offers secure, private data management with local biometric architecture and automated data purging.

**Highlights:** Instant knowledge ingestion (scan, voice, document, paste, AI generation), Cinematic memory reels with AI voice-over narration, Interactive vault chat for data summarization and analysis, Chronos timeline and knowledge graph visualization, Local biometric security and data privacy, Automated data purge option

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Axiom Creation Engine Monthly | $19.99 | per month |
| Axiom Infinite Brain Monthly | $49.99 | per month |
| Axiom Creation Engine Annual | $200.00 | per year |
| Axiom Infinite Brain Annual | $450.00 | per year |


## Frequently asked questions

### Is Zettelkasten free?

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

### Is Axiom free?

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

### Which has better reviews, Zettelkasten or Axiom?

Axiom is rated higher. Zettelkasten averages 3.0 out of 5 from 1 ratings, while Axiom averages 5.0 from 1 ratings.

### Do Zettelkasten or Axiom have ads?

Neither Zettelkasten nor Axiom shows ads.

### Which is updated more often, Zettelkasten or Axiom?

Zettelkasten ships an update monthly, and Axiom weekly. Most recently, Zettelkasten was updated on October 31, 2026 and Axiom on November 5, 2026.

---

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