# 16 Relay Controller vs AM

The clearest difference is update cadence: AM at every 4 months against 16 Relay Controller's every 34 months. AM 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.

16 Relay Controller ships an update every 34 months, AM every 4 months. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 16 Relay Controller | AM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/am-fog/id1593388074/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 4 months** |
| Monetization | — | Free |
| Size | 0 MB | 9 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mike Henry](https://appshunter.io/developer/1219782847) | [Water Analytics, Inc](https://appshunter.io/developer/1593388076) |

## What reviewers say

### 16 Relay Controller

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

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

**In-app purchases:** none


### AM

[App page](https://appshunter.io/ios/app/am-fog/id1593388074)

This utility app connects to a specialized probe to measure fats, oils, and grease levels. It utilizes Bluetooth Low Energy for seamless communication with the probe, providing essential data for monitoring and analysis.

**Highlights:** FOG level measurement, BLE probe communication, Data monitoring, Water analytics support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 16 Relay Controller free?

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

### Is AM free?

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

### Do 16 Relay Controller or AM have ads?

Neither 16 Relay Controller nor AM shows ads.

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

16 Relay Controller ships an update every 34 months, and AM every 4 months. Most recently, 16 Relay Controller was updated on October 25, 2026 and AM on October 8, 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.*