# Smart Diffuser vs Aroma

The clearest difference is rating: Smart Diffuser at 2.7 against Aroma's 1.7. Smart Diffuser also leads on review sentiment (25% vs 10%). Aroma's advantage is ratings volume (122 vs 6) and update cadence (every 2 weeks vs every 6 weeks). 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.

Smart Diffuser holds the better App Store score, 2.7 against 1.7. That said, the two scores are not equally well evidenced: Aroma has 122 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 25% of Smart Diffuser's written reviews are positive against 10% of Aroma's.

Smart Diffuser ships an update every 6 weeks, Aroma every 2 weeks. The most recent releases landed on July 7, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Smart Diffuser | Aroma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (6 ratings)](https://appshunter.io/ios/app/smart-diffuser/id1436466932/reviews)** | [1.7 (122 ratings)](https://appshunter.io/ios/app/aroma-link/id1505915988/reviews) |
| Number of ratings | 6 | **122** |
| Positive reviews | **25.0% of reviews** | 10.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 42 MB | 30 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) | [可汗 罗](https://appshunter.io/developer/1407110279) |

## 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


### Aroma

[App page](https://appshunter.io/ios/app/aroma-link/id1505915988)

Control and manage various air treatment devices remotely via a cloud platform. Supports multiple communication methods and devices, offering data statistics and enhanced information security for businesses.

**Highlights:** Remote device control, Multi-communication support (Bluetooth, WiFi, 2G/4G), Data statistics and analysis, Information security, Hardware integration for various equipment, Cross-platform compatibility (mobile & PC)

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to connect and run
- 👍 User-friendly interface
- 👍 Awesome program ability
- 👍 Great app if you ask me
- 👍 Connects very fast on Bluetooth

**What reviewers complain about**

- 🐛 App doesn't work
- 🐛 Cannot connect to device
- 🐛 Bluetooth issues
- 🐛 WiFi connection problems
- 🐛 App is buggy

**Reported bugs**

- Device does not turn on
- Bluetooth connection is weak or lost
- WiFi connection is unstable or unavailable
- App does not save settings or schedules
- App reverts to factory settings

**Requested features**

- Add more time schedules
- Increase pause limit for schedules
- Add ability to edit day of the week in schedule
- Add more working periods
- Allow programming for the whole week with multiple options


## Frequently asked questions

### Is Smart Diffuser free?

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

### Is Aroma free?

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

### Which has better reviews, Smart Diffuser or Aroma?

Smart Diffuser is rated higher. Smart Diffuser averages 2.7 out of 5 from 6 ratings, while Aroma averages 1.7 from 122 ratings.

### Do Smart Diffuser or Aroma have ads?

Neither Smart Diffuser nor Aroma shows ads.

### Which is updated more often, Smart Diffuser or Aroma?

Smart Diffuser ships an update every 6 weeks, and Aroma every 2 weeks. Most recently, Smart Diffuser was updated on July 7, 2026 and Aroma on September 22, 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.*