# Codex. vs Rectoly for Zotero

The clearest difference is iOS requirement: Codex. at 13.0 against Rectoly for Zotero's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Codex. sells 1 in-app purchase, starting at $2.99 per month and Rectoly for Zotero sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Codex. ships an update every 3 days, Rectoly for Zotero daily. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Codex. | Rectoly for Zotero |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | **Daily** |
| Size | 137 MB | 45 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Niels De Jong](https://appshunter.io/developer/1896571499) | [Takaki Takemura](https://appshunter.io/developer/6793454900) |

## What reviewers say

### Codex.

[App page](https://appshunter.io/ios/app/codex/id6768423589)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Codex Unbound Monthly | $2.99 | per month |


### Rectoly for Zotero

[App page](https://appshunter.io/ios/app/rectoly-for-zotero/id6803044396)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Rectoly Pro (one-time) | $19.99 | one-time |


## Frequently asked questions

### Is Codex. free?

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

### Is Rectoly for Zotero free?

Rectoly for Zotero is free to download, with in-app purchases available.

### Do Codex. or Rectoly for Zotero have ads?

Neither Codex. nor Rectoly for Zotero shows ads.

### Which is updated more often, Codex. or Rectoly for Zotero?

Codex. ships an update every 3 days, and Rectoly for Zotero daily. Most recently, Codex. was updated on October 10, 2026 and Rectoly for Zotero on October 11, 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.*