No current price: sold on Dreo's own store ($99.99), which our price feeds do not cover
17 facts in comparison
Dreo Air Purifier 338 vs Dreo Air Purifier 338S
The same purifier twice, separated by a radio. Airflow, coverage, filtration and noise are identical, and the entire decision comes down to whether the machine is on the network.
The 338S adds app control and voice-assistant support. That buys scheduling, remote start and stop, air-quality readings on a phone, and hands-free commands. The 338 has neither, and is operated from its own controls.
Both use a 3-in-1 cartridge (pre-filter, HEPA and an activated carbon layer bonded together), so cooking smells and pet odor give no reason to prefer one over the other.
Otherwise there is nothing to weigh. Both pull the same volume of air, both filter it the same way through HEPA, and both are quiet at their lowest setting. Neither will outperform the other on a particle count.
The recommendation is unglamorous. If you will set a purifier to auto and never touch it again, the 338 does the identical job for less money, and the app is a feature you will open twice. If you will use scheduling, want to see air-quality history, or already run a smart-home setup where a voice command is faster than crossing the room, the 338S is worth the difference. It is a small premium for a convenience that either fits your habits or does not.
Editor’s note
On this pair, the purifier is the same and the ownership is not.
Both do the basics well. At a proper air-change rate they suit a room of about 178 square feet, a bedroom or a small office, and they drop to a very quiet sleep setting. The larger coverage figure on the box is the usual one-air-change stretch, so neither is the right size for a living room, and buying the smart version will not change that.
The 338 has no remote control at all, so scheduling means remembering to press a button, and it relies on its own sensor and auto mode to react to cooking or dust. The 338S adds the app and voice control, but the network is only worth having if you open it. Dreo lists no filter life or power draw for either model.
Walk past both if the room is large. Choose the 338S only if its smart features match a habit you already have.
Head-to-head points: every spec is scaled between these products only, so a product can score high here and modestly on its own page, where the VS Score measures it against the median of its class.
Where the Dreo Air Purifier 338 beats the Dreo Air Purifier 338S
No standout advantages.
Where the Dreo Air Purifier 338S beats the Dreo Air Purifier 338
- Has app control ?
- Has voice assistant ?
Key real-world differences
The spec sheet pulls in both directions. These are the gaps big enough to shape the decision — with the actual figures, and what each one means in real-world use.
- App controlSmart featuresNo vs Yes — only the Dreo Air Purifier 338S has it
Control and monitor it from a phone app.
- Voice assistantSmart featuresNo vs Yes — only the Dreo Air Purifier 338S has it
Works with Alexa and Google Assistant.
Which one should you buy?
There is no single answer — it depends on what you will actually use it for. Match your priority to the pick below.
- Best for smart features Dreo Air Purifier 338S takes the category 100 to 69 — driven by app control (No vs Yes).
- Top overall score Dreo Air Purifier 338S tops the overall VS Score at 100 while winning 1 of 4 categories outright.
Where each one falls short
Dreo Air Purifier 338
- App control: No vs Yes
- Voice assistant: No vs Yes
- 6 specs are unreported (shown as Unknown) and excluded from its scores.
Dreo Air Purifier 338S
- No major spec weaknesses in this matchup — the gaps that exist are small.
- 8 specs are unreported (shown as Unknown) and excluded from its scores.
What matters to you?
Drag the sliders to weight each category and re-rank the products to suit your priorities.
Score breakdown
Performance
Filtration
Noise & power
Design
Smart features
Specs last verified September 24, 2026Dreo Air Purifier 338: 16 of 22 specs verified (73%)Dreo Air Purifier 338S: 14 of 22 specs verified (64%)Unverified specs show as Unknown — never estimated, never scored
Where to buy
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What reviewers say
The bottom line
For most buyers the plain 338 is the right choice: it cleans the air in a bedroom or small office exactly as well as the 338S, runs happily in auto mode, and costs less to buy. The 338S makes sense only for someone who will use scheduling, remote control or voice commands, or who already runs a smart home where the purifier should behave like everything else.
The one trade-off that decides it is convenience against simplicity. Size up to a larger model if the room is anything more than modest.
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