# Codex. vs TradeOS Engineer

The clearest difference is in-app purchases: TradeOS Engineer at none against Codex.'s 1. Codex.'s advantage is update cadence (every 3 days vs fortnightly) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Codex. sells 1 in-app purchase, starting at $2.99 per month. TradeOS Engineer asks for nothing beyond the download.

Codex. ships an update every 3 days, TradeOS Engineer fortnightly. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Codex. | TradeOS Engineer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Fortnightly |
| Size | 137 MB | 45 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Niels De Jong](https://appshunter.io/developer/1896571499) | [daniel betts](https://appshunter.io/developer/1896339577) |

## 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 |


### TradeOS Engineer

[App page](https://appshunter.io/ios/app/tradeos-engineer/id6771853044)

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

**In-app purchases:** none


## Frequently asked questions

### Is Codex. free?

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

### Is TradeOS Engineer free?

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

### Do Codex. or TradeOS Engineer have ads?

Neither Codex. nor TradeOS Engineer shows ads.

### Which is updated more often, Codex. or TradeOS Engineer?

Codex. ships an update every 3 days, and TradeOS Engineer fortnightly. Most recently, Codex. was updated on October 10, 2026 and TradeOS Engineer on October 7, 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.*