# Smart Diffuser vs Scent Master Pro

The clearest difference is review sentiment: Scent Master Pro at 100% against Smart Diffuser's 25%. Scent Master Pro also leads on rating (5.0 vs 2.7) and update cadence (fortnightly vs every 6 weeks). Smart Diffuser's advantage is ratings volume (6 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Scent Master Pro holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 25% of Smart Diffuser's written reviews are positive against 100% of Scent Master Pro's.

Smart Diffuser ships an update every 6 weeks, Scent Master Pro fortnightly. The most recent releases landed on July 7, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Smart Diffuser | Scent Master Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (6 ratings)](https://appshunter.io/ios/app/smart-diffuser/id1436466932/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/scent-master-pro/id6499073832/reviews)** |
| Number of ratings | **6** | 2 |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 42 MB | 180 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [秦庚 蒋](https://appshunter.io/developer/1436462643) | [兵 姚](https://appshunter.io/developer/1546606210) |

## 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


### Scent Master Pro

[App page](https://appshunter.io/ios/app/scent-master-pro/id6499073832)

This intelligent fragrance management app allows real-time monitoring and remote control of connected devices. Users can customize working modes, set schedules, and track oil levels for a seamless experience.

**Highlights:** Remote device control, Custom working modes, Real-time oil level monitoring, Intelligent usage calibration, Device sharing management, Scheduled operation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smart Diffuser free?

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

### Is Scent Master Pro free?

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

### Which has better reviews, Smart Diffuser or Scent Master Pro?

Scent Master Pro is rated higher. Smart Diffuser averages 2.7 out of 5 from 6 ratings, while Scent Master Pro averages 5.0 from 2 ratings.

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

Neither Smart Diffuser nor Scent Master Pro shows ads.

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

Smart Diffuser ships an update every 6 weeks, and Scent Master Pro fortnightly. Most recently, Smart Diffuser was updated on July 7, 2026 and Scent Master Pro on September 16, 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.*