# PIECO vs Codex Relay

The clearest difference is review sentiment: PIECO at 100% against Codex Relay's 63%. PIECO also leads on iOS requirement (14.2 vs 16.4). Codex Relay's advantage is update cadence (every 9 days vs every 3 months) and chart position (#100 vs unranked). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PIECO ships an update every 3 months, Codex Relay every 9 days. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | PIECO | Codex Relay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (56 ratings)](https://appshunter.io/ios/app/codex-relay-remote-codex-app/id6764463488/reviews)** |
| Number of ratings | — | **56** |
| Positive reviews | **100.0% of reviews** | 63.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | Free | Free |
| Best chart rank | — | **#100** |
| Size | 23 MB | 118 MB |
| Requires iOS | **14.2** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [HOERBIGER Flow Control GmbH](https://appshunter.io/developer/1587896992) | [Kang Sungyu](https://appshunter.io/developer/1895791948) |

## What reviewers say

### PIECO

[App page](https://appshunter.io/ios/app/pieco/id1587896990)

Monitor and control laser gas mixing and regulation systems in real-time. Access live data on gas consumption and input pressure, and adjust settings to optimize cutting quality and speed.

**Highlights:** Real-time gas consumption monitoring, Live input pressure information, Adjustable gas mixing ratio, Control cutting quality and speed, Application support requests

**Features:** Vision Pro support

**In-app purchases:** none


### Codex Relay

[App page](https://appshunter.io/ios/app/codex-relay-remote-codex-app/id6764463488)

**Currently charting:** #100 Top Free · Developer Tools (US App Store)

Manage your Codex workflow remotely from your phone. Track active threads, send prompts, review output, and respond to requests. Designed for developers to stay connected to their work without being at their desk.

**Highlights:** Follow Codex conversations remotely, Send prompts and follow-up instructions, Respond to approval and input requests, Attach images for context, Review workspace and thread activity, Manage relay server state, Check usage statistics

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

**In-app purchases:** none


## Frequently asked questions

### Is PIECO free?

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

### Is Codex Relay free?

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

### Do PIECO or Codex Relay have ads?

Neither PIECO nor Codex Relay shows ads.

### Which is updated more often, PIECO or Codex Relay?

PIECO ships an update every 3 months, and Codex Relay every 9 days. Most recently, PIECO was updated on October 9, 2026 and Codex Relay on October 12, 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.*