# Zettelbox vs Singularity Codex

The clearest difference is device support: Zettelbox at 3 against Singularity Codex's 1. Zettelbox also leads on iOS requirement (16.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Zettelbox sells 3 in-app purchases, starting at $4.99 per month and Singularity Codex sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Zettelbox | Singularity Codex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (24 ratings)](https://appshunter.io/ios/app/zettelbox-ai-note-taking/id1605557791/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 30.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Freemium | — |
| Size | 117 MB | 5 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Hong Kong Source Research Society Supply Chain Limited](https://appshunter.io/developer/1761795867) | [BURAK KADAN](https://appshunter.io/developer/6811318808) |

## What reviewers say

### Zettelbox

[App page](https://appshunter.io/ios/app/zettelbox-ai-note-taking/id1605557791)

Capture inspiration and organize your life with this app that integrates notes, to-dos, and scheduling. It helps transform scattered information into a structured knowledge base through smart review and related note linking. Enjoy secure local storage with optional cloud backups.

**Highlights:** Quick note capture with desktop widget, Intuitive tagging and nested categorization, Smart review to rediscover past thoughts, Link related notes for deeper understanding, Local encrypted storage, Cloud backup support

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $4.99 | per month |
| Yearly Plan | $19.99 | per year |
| PowerPack Permanent | $64.99 | one-time |


### Singularity Codex

[App page](https://appshunter.io/ios/app/singularity-codex-self-notes/id6811318806)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Codex, for good | $12.99 | one-time |


## Frequently asked questions

### Is Zettelbox free?

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

### Is Singularity Codex free?

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

### Do Zettelbox or Singularity Codex have ads?

Neither Zettelbox nor Singularity Codex shows ads.

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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.*