Dreo 338 vs 338S: Is Smart Control Worth It?
Automated research by Top10Scout editorial team · Not hands-on tested · Last verified 2026-10-05
Published · Updated
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For a new purchase, choose the 338S if you want phone control; keep a working 338 if you normally leave it in Auto. The standard purifier already responds to air quality. The S model adds a more convenient way to manage it, rather than creating automatic purification for the first time. Replacing the whole appliance makes sense only when that control solves a regular problem.
What changes from 338 to 338S?
The differences behind the purchase
| Decision point | Dreo 338 | Dreo 338S |
|---|---|---|
| US store reference | $89.99 USD | $99.99 USD |
| Automatic response | Auto mode documented | Auto mode documented |
| Smart controls | Standard variant | Phone control and filter-life tracking |
| Advertised maximum area | 856 | 856 sq. ft |
| Timer | 12H | 12 Hours |
Both pages describe automatic operation and a particle display. That matters if you want a purifier you can leave running: the standard model is already designed to adjust its fan as air quality changes. Do not mistake “smart” for “the only one with an automatic mode.”
The 338S adds documented smart control and filter-life tracking. We would value that when the purifier sits across the room or you want to manage it from a phone. If you always switch it on beside your bed and leave Auto alone, the extra interface may rarely get used.
Will the smart version clean a bigger room?
Both advertise the same maximum room area. The standard model explicitly states 856 square feet at one air change per hour. That is a headline coverage condition, not a promise of rapid repeated cleaning across an entire apartment. The matching maximum on the S model gives no basis for buying it as a capacity upgrade.
Start with the actual room, open doorways and the speed you will tolerate. A purifier tucked behind furniture does not gain useful airflow because it has an app. Both model FAQs say to leave the inlet and outlet unobstructed and remove the filter packaging before use.
How much extra would you pay?
The checked direct-store configurations are the white 338 at $89.99 USD and white 338S at $99.99 USD. Their listed hardware-price gap is $10.00. Checkout totals can change with tax, shipping and promotions. These reference colours may differ from the retailer options shown below; confirm the exact finish and package at checkout.
For someone buying either purifier from scratch, that is a modest convenience premium. For an owner, it is a new appliance purchase, not just the difference between two shelf prices. We would not replace a functioning 338 simply to add a phone screen to a job it already performs automatically.
What costs and chores remain?
Both still need electricity, replacement filters and occasional cleaning around the air path. A filter-life indicator helps with attention; it does not make filters free or remove the need to inspect a clogged filter. The standard page gives a broad replacement interval and explains that air quality and runtime change it, so we have not invented a fixed annual consumables bill.
The buying case here rests on the documented controls and automatic operation. It does not depend on a cloud-recording plan or a paid analysis service. After changing a filter, reset the reminder as instructed: replacing the physical filter alone does not reset it.
Buying new: choose around your control routine
We would buy the 338S when its phone controls will be used regularly and the current premium stays small. Choose the 338 when you want straightforward automatic purification and the saving matters. Settle room suitability before paying for convenience; neither app access nor a higher model suffix increases the documented maximum coverage.
Already own the 338: keep it unless control is the problem
Keep it if Auto responds as expected and you can reach the controls comfortably. Consider switching when you repeatedly need the smart interface and would actually use it. If the problem is weak airflow, first inspect placement, packaging and the filter; buying the smart variant is not a demonstrated airflow fix.
Frequently asked questions
Does the Dreo 338 have Auto mode?
Yes. Its official page describes autonomous purification and explains how the fan behaves in Auto. You do not need the S model solely to get an air-quality-responsive operating mode.
Does 338S replace filter maintenance?
No. It adds a way to track filter life, while the physical filter still collects material and eventually needs replacement. Check the filter and follow the reset instructions after replacing it.
Is the larger coverage number a whole-home promise?
No. The standard page states its area at one air change per hour. Room layout and the amount of repeated cleaning you want matter; a maximum area does not describe every operating speed.
Is it worth replacing a 338 with a 338S?
Usually only if smart control fixes a repeated inconvenience. An existing owner pays for a new appliance, less any real resale value. The difference between their list prices is not the cost of switching.
Official sources
Dreo 338 (DR-HAP008): checked exact-model source and conditions — checked 2026-10-05
Dreo 338S (DR-HAP008S): checked exact-model source and conditions — checked 2026-10-05