# D+ vs Smart Diffuser

The clearest difference is rating: D+ at 3.7 against Smart Diffuser's 2.7. D+ also leads on device support (4 vs 2) and iOS requirement (9.0 vs 12.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

D+ holds the better App Store score, 3.7 against 2.7. Both are backed by a comparable volume of ratings — 3 and 6 respectively.

D+ ships an update every 4 weeks, Smart Diffuser every 6 weeks. The most recent releases landed on June 1, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | D+ | Smart Diffuser |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/d-plus/id1191388630/reviews)** | [2.7 (6 ratings)](https://appshunter.io/ios/app/smart-diffuser/id1436466932/reviews) |
| Number of ratings | 3 | **6** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 145 MB | 42 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [英江 李](https://appshunter.io/developer/524505813) | [秦庚 蒋](https://appshunter.io/developer/1436462643) |

## What reviewers say

### D+

[App page](https://appshunter.io/ios/app/d-plus/id1191388630)

Automate your home with a wireless smart home system. Control appliances, lighting, security, and more remotely. Enjoy personalized comfort and enhanced home management.

**Highlights:** Security alarm, Fingerprint access, Remote video monitoring, Appliance control, Curtain control, Scene and timing control, Energy saving

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is D+ free?

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

### Is Smart Diffuser free?

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

### Which has better reviews, D+ or Smart Diffuser?

D+ is rated higher. D+ averages 3.7 out of 5 from 3 ratings, while Smart Diffuser averages 2.7 from 6 ratings.

### Do D+ or Smart Diffuser have ads?

Neither D+ nor Smart Diffuser shows ads.

### Which is updated more often, D+ or Smart Diffuser?

D+ ships an update every 4 weeks, and Smart Diffuser every 6 weeks. Most recently, D+ was updated on June 1, 2026 and Smart Diffuser on July 7, 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.*