# Smart Diffuser vs Cardest

The clearest difference is update cadence: Cardest at weekly against Smart Diffuser's every 5 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.

Smart Diffuser ships an update every 5 months, Cardest weekly. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Smart Diffuser | Cardest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/smart-diffuser/id6502768383/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free | — |
| Size | 3 MB | 96 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Shenzhen Shengmu Technology Co., Ltd.](https://appshunter.io/developer/1746717166) | [Cardest](https://appshunter.io/developer/1888346098) |

## What reviewers say

### Smart Diffuser

[App page](https://appshunter.io/ios/app/smart-diffuser/id6502768383)

Control your aroma diffuser remotely via Bluetooth. Adjust power, lighting, intensity, and set custom schedules. Reset your device directly from your phone.

**Highlights:** Bluetooth connectivity, Power control, Atmosphere light adjustment, Intensity settings, Schedule setup, Device reset

**Features:** macOS Compatibility

**In-app purchases:** none


### Cardest

[App page](https://appshunter.io/ios/app/cardest/id6761372892)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Diffuser free?

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

### Is Cardest free?

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

### Do Smart Diffuser or Cardest have ads?

Neither Smart Diffuser nor Cardest shows ads.

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

Smart Diffuser ships an update every 5 months, and Cardest weekly. Most recently, Smart Diffuser was updated on October 5, 2026 and Cardest on October 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.*