# Smart Diffuser vs Birds@SG

The clearest difference is in-app purchases: Smart Diffuser at none against Birds@SG's 2. Smart Diffuser also leads on ads (none vs shown). Birds@SG's advantage is update cadence (every 6 days vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Birds@SG sells 2 in-app purchases, starting at $1.99 per month. Smart Diffuser asks for nothing beyond the download.

Smart Diffuser ships an update every 5 months, Birds@SG every 6 days. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Smart Diffuser | Birds@SG |
| --- | --- | --- |
| 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** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 3 MB | 58 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen Shengmu Technology Co., Ltd.](https://appshunter.io/developer/1746717166) | [Hosay Studios](https://appshunter.io/developer/599398754) |

## 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


### Birds@SG

[App page](https://appshunter.io/ios/app/birdssg/id6759211949)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Birds@SG Pro Monthly | $1.99 | per month |
| Birds@SG Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is Smart Diffuser free?

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

### Is Birds@SG free?

Birds@SG is free to download, with in-app purchases available.

### Do Smart Diffuser or Birds@SG have ads?

Birds@SG shows ads; Smart Diffuser does not.

### Which is updated more often, Smart Diffuser or Birds@SG?

Smart Diffuser ships an update every 5 months, and Birds@SG every 6 days. Most recently, Smart Diffuser was updated on September 18, 2026 and Birds@SG on September 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*