# Smart Diffuser vs Smart Scent Pro

The clearest difference is iOS requirement: Smart Diffuser at 12.0 against Smart Scent Pro's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Smart Diffuser ships an update every 6 weeks, Smart Scent Pro every 2 months. The most recent releases landed on July 7, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Smart Diffuser | Smart Scent Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (6 ratings)](https://appshunter.io/ios/app/smart-diffuser/id1436466932/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 42 MB | 20 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [秦庚 蒋](https://appshunter.io/developer/1436462643) | [永锦 罗](https://appshunter.io/developer/1444842458) |

## What reviewers say

### Smart Diffuser

[App page](https://appshunter.io/ios/app/smart-diffuser/id1436466932)

Control your smart scent machine remotely via Wi-Fi. Adjust scent intensity, monitor oil levels, and manage multiple devices. Authorize other users and group machines for business use.

**Highlights:** Remote Wi-Fi control, Scent intensity adjustment, Oil level monitoring, User authorization, Device grouping, Employee account management

**In-app purchases:** none


### Smart Scent Pro

[App page](https://appshunter.io/ios/app/smart-scent-pro/id1558962248)

**In-app purchases:** none


## Frequently asked questions

### Is Smart Diffuser free?

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

### Is Smart Scent Pro free?

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

### Do Smart Diffuser or Smart Scent Pro have ads?

Neither Smart Diffuser nor Smart Scent Pro shows ads.

### Which is updated more often, Smart Diffuser or Smart Scent Pro?

Smart Diffuser ships an update every 6 weeks, and Smart Scent Pro every 2 months. Most recently, Smart Diffuser was updated on July 7, 2026 and Smart Scent Pro on September 10, 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.*