# ETI Commander vs 16 Relay Controller

The clearest difference is update cadence: ETI Commander at every 2 months against 16 Relay Controller's every 34 months. ETI Commander also leads on iOS requirement (13.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

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

ETI Commander ships an update every 2 months, 16 Relay Controller every 34 months. The most recent releases landed on June 22, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | ETI Commander | 16 Relay Controller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/eti-commander/id1423110846/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 34 months |
| Monetization | Free | — |
| Size | 10 MB | 0 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Electronic Technology Inc.](https://appshunter.io/developer/1423110845) | [Mike Henry](https://appshunter.io/developer/1219782847) |

## What reviewers say

### ETI Commander

[App page](https://appshunter.io/ios/app/eti-commander/id1423110846)

This app allows users to program and monitor ETI MNPR relays using a Bluetooth optical head. It facilitates troubleshooting of network protector and relay operations. Requires specific ETI hardware for functionality.

**Highlights:** Program MNPR relays, Monitor MNPR relays, Bluetooth optical head connectivity, Troubleshoot relay operation, Troubleshoot network protector operation

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

**In-app purchases:** none


### 16 Relay Controller

[App page](https://appshunter.io/ios/app/16-relay-controller/id1541478119)

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

**In-app purchases:** none


## Frequently asked questions

### Is ETI Commander free?

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

### Is 16 Relay Controller free?

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

### Do ETI Commander or 16 Relay Controller have ads?

Neither ETI Commander nor 16 Relay Controller shows ads.

### Which is updated more often, ETI Commander or 16 Relay Controller?

ETI Commander ships an update every 2 months, and 16 Relay Controller every 34 months. Most recently, ETI Commander was updated on June 22, 2026 and 16 Relay Controller on September 18, 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.*