# Scent Machine vs Diffuser

The clearest difference is update cadence: Scent Machine at every 9 days against Diffuser's every 2 months. 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.

Scent Machine ships an update every 9 days, Diffuser every 2 months. The most recent releases landed on September 13, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Scent Machine | Diffuser |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Size | 54 MB | 35 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [春荣 杨](https://appshunter.io/developer/1677484703) | [Jiaxing Rongcheng Electronic Technology Co., Ltd](https://appshunter.io/developer/1433479396) |

## What reviewers say

### Scent Machine

[App page](https://appshunter.io/ios/app/scent-machine/id6446355637)

**Features:** macOS Compatibility

**In-app purchases:** none


### Diffuser

[App page](https://appshunter.io/ios/app/diffuser/id6462354691)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Scent Machine free?

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

### Is Diffuser free?

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

### Do Scent Machine or Diffuser have ads?

Neither Scent Machine nor Diffuser shows ads.

### Which is updated more often, Scent Machine or Diffuser?

Scent Machine ships an update every 9 days, and Diffuser every 2 months. Most recently, Scent Machine was updated on September 13, 2026 and Diffuser on June 1, 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.*