# aInventarium vs 16 Relay Controller

The clearest difference is update cadence: aInventarium at every 4 months against 16 Relay Controller's every 34 months. aInventarium also leads on iOS requirement (16 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.

aInventarium ships an update every 4 months, 16 Relay Controller every 34 months. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | aInventarium | 16 Relay Controller |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 34 months |
| Size | 44 MB | 0 MB |
| Requires iOS | **16** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Paulo Silva](https://appshunter.io/developer/1478829768) | [Mike Henry](https://appshunter.io/developer/1219782847) |

## What reviewers say

### aInventarium

[App page](https://appshunter.io/ios/app/ainventarium/id788394024)

**Features:** macOS Compatibility

**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 aInventarium free?

aInventarium 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 aInventarium or 16 Relay Controller have ads?

Neither aInventarium nor 16 Relay Controller shows ads.

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

aInventarium ships an update every 4 months, and 16 Relay Controller every 34 months. Most recently, aInventarium was updated on October 3, 2026 and 16 Relay Controller on October 6, 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.*