The world of scent technology keeps evolving, and Pura continues to lead the way. If you’re thinking about upgrading or buying for the first time, you’re probably asking: what’s the real difference between Pura 3 vs 4? Is the newer Pura 4 smart diffuser worth the extra cost, or is the Pura 3 still enough for everyday use?
In this full comparison, we’ll look at design updates, smart features, automation, and how each Pura smart diffuser fits into a connected home. From Pura HomeKit compatibility to the quietest fan systems yet, here’s how to decide which version deserves your wall space.
What You Still Get with Pura 3
If you’re not after the newest bells and whistles, Pura 3 is still a solid option. It’s compact, simple to use, and holds two Pura smart vials, letting you switch between scents directly from your phone.
Here’s what’s inside the Pura 3 experience:
- Dual scent cartridge slots
- Control via Bluetooth and Wi-Fi
- Adjustable scent intensity
- Full app support on both iOS and Android
- Compatibility with standard Pura smart fragrance diffuser refills
While it skips the advanced tech that newer models include, Pura 3 still gets the job done for basic smart home fragrance needs. It’s ideal for users who value ease over deep customization.
What’s Upgraded in the Pura 4 Smart Diffuser
The Pura 4 takes the original concept and pushes it into premium territory. If you’re after better control, smoother performance, and smarter automation, this model delivers across the board.
Key improvements include:
- A thinner, more modern design that blends into any space
- Ultra-quiet operation thanks to enhanced fan systems
- Adaptive scent diffusion that responds to your preferences
- Motion sensor that turns the diffuser off when the room is empty
- Full integration with Pura HomeKit and other platforms
- LED lighting with customizable colors
- Seamless over-the-air firmware updates via the Pura smart device interface
Whether you’re new to smart diffusers or upgrading from an older version, Pura 4 offers a more intuitive, future-proof experience.
Feature Comparison: Pura V3 vs V4
Here’s how the two stack up:
| Feature | Pura 3 | Pura 4 |
|---|---|---|
| Connectivity | Wi-Fi, Bluetooth | Wi-Fi, Bluetooth, HomeKit |
| Motion Sensor | No | Yes |
| Diffusion Control | Manual | Adaptive Smart Control |
| LED Lighting | Basic On/Off | Custom RGB |
| Noise Level | Moderate | Whisper-quiet |
| Refill Compatibility | Yes (Smart Vials) | Yes (Same vials) |
| Size and Design | Standard plug-in style | Slim, modern wall-hugging look |
If you’re comparing pura v3 vs v4, the fourth-generation device is clearly the more intelligent pick. It’s especially great for users who already have a Pura smart home setup or plan to build one.
What About Older Models Like Pura 2 and Pura V?
If you stumble upon older stock or secondhand offers, you might wonder if Pura 2 or Pura V are worth considering. These models still work, especially in smaller rooms or office spaces. However, they lack many core features that define today’s Pura smart home diffuser experience.
Here’s what you miss:
- Limited app functionality
- No HomeKit or Google Home options
- Less precise intensity control
- May not support newer Pura smart vial formats
In short, while older models aren’t useless, they’re increasingly outdated and not built for the connected homes of 2025 and beyond.
What We Know About the Nest Pura Smart Diffuser
Some users have heard about a Nest Pura smart diffuser, leading to confusion. Is there an official Google Nest version?
The answer: not yet. There’s no direct integration between Pura and Google Nest as of mid-2025. However, many smart home fans have managed to pair Pura 4 with their Nest or Google Home setup using HomeKit bridges or third-party tools.
This shows Pura’s direction — aligning with the broader Internet of Things (IoT) world. So while Nest Pura smart diffuser isn’t officially real (yet), the connection is technically possible.
Who Wins? A Straightforward Pura Smart Diffuser Review
Let’s put it plainly:
- Pura 3 is for those who want simplicity. If you’re happy with scent scheduling, basic control, and solid performance, it covers all the essentials.
- Pura 4 is for tech-forward users. Want motion sensors? LED mood lighting? Smart integration with HomeKit and quiet adaptive diffusion? This is your pick.
Each Pura device supports the same refills, so you’re never locked into one format. And since the Pura smart home diffuser lineup evolves regularly, upgrading from 3 to 4 is seamless if you change your mind later.
Choosing the Right Pura for Your Space
Here’s a quick guide to help you decide:
Go with Pura 3 if you:
- Want a more budget-friendly diffuser
- Don’t need motion sensing or advanced smart controls
- Prefer plug-and-play simplicity
Choose Pura 4 if you:
- Use Apple HomeKit or plan to automate your home
- Want quieter performance and smoother scent transitions
- Like having RGB lights or motion-based shutoff
- Care about software updates and device longevity
With both models using the same Pura smart fragrance diffuser refills, you’re free to start with one and upgrade without waste.
