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How these picks were made: by comparing published specifications and clearly-credited public reporting. We do not run a laboratory, we have not measured these products, and we do not claim to have slept with them. Here is exactly how we choose.
Use the app to find out whether masking works for you at all. Buy a machine if it does - not because the sound is better, but because the phone brings problems of its own.
Use the app first, always
We would tell anyone considering their first sound machine to spend a week with a free app before spending anything. Masking either helps you or it does not, and a free trial answers that question completely. If a week of app noise changes nothing, a $100 machine will also change nothing, and your problem is elsewhere - start from the problem instead.
Where the app genuinely wins
- Cost. Free, and you already own the hardware.
- Variety. Hundreds of soundscapes, often with mixers. No machine competes on breadth.
- Travel. It is already in your pocket, which is more than can be said for a mains-powered Dohm.
- Trying colors. Want to know whether brown noise suits you? Free to find out.
Where the app loses
- Looping. Most app tracks are short files played on repeat. Some people never notice; others hear the seam on night one and never stop hearing it.
- Interruptions. A notification, a call, an OS update prompt - any of which cuts the sound at 3am and wakes you with the sudden silence.
- Phone speakers. Small drivers roll off the low frequencies, which is exactly the range that masks traffic and snoring.
- Battery and heat. Overnight playback plus charging means a warm phone under a pillow, which is a genuinely bad idea.
- The phone is in the bedroom. The largest cost, and the least discussed.
The phone-in-the-bedroom problem
If you use your phone as a sound machine, your phone has to be next to your bed all night. That means a screen within reach when you wake at 3am, and screen light in a room you have otherwise tried to make dark.
The light part is not trivial. A 2022 consensus paper in PLOS Biology recommends keeping melanopic illuminance under about 1 lux during sleep, and Harvard Health notes that even dim light around 8 lux - less than most table lamps - has measurable circadian effects, and that blue light suppresses melatonin roughly twice as long as green light of comparable brightness. A phone screen at arm’s length clears those numbers comfortably.
A dedicated machine has one job, no screen, and nothing to scroll. That is the real argument for buying one, and it has little to do with audio quality.
Side by side
| Phone app | Dedicated machine | |
|---|---|---|
| Cost | Free | Low to high |
| Sound variety | Hundreds | One to a few dozen |
| Looping | Usually | Not on the good ones |
| Interruptions | Calls, alerts, updates | None |
| Low-frequency output | Weak - small drivers | Good |
| Screen in the bedroom | Yes | No |
| Travel | Perfect | Depends on the model |
The middle ground
If you want the app’s variety without the phone by your pillow: play it through a small Bluetooth speaker across the room, put the phone face-down out of reach on a charger, and switch on do-not-disturb. That solves the light, the reach and most of the interruptions, at the cost of one more device to charge.
Or use sleep earbuds, which both stream the app and physically block noise, and let the phone sit across the room.
If the app trial worked and you want to stop using your phone
Tap any row to jump to the full write-up. The photographs are licensed stock images chosen to illustrate the category - they are not photographs of these specific products, and each one’s alt text describes what is actually shown.
| # | Product | Best for | The spec that decides it | Price |
|---|---|---|---|---|
| 1 |  Yogasleep Dohm ClassicAn actual fan inside a shell. It cannot loop, because there is no recording - you tune the sound by twisting the housing. | People who hear the seam in a looped recording | Mechanical fan-based noise, no recording, no loop | |
| 2 |  LectroFan EVOThe digital machine that solved the loop problem: 22 sounds generated rather than played back, so there is no seam to notice. | Digital variety without the loop artifact | 22 non-looping generated sounds |
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Our top pick · People who hear the seam in a looped recording
1. Yogasleep Dohm Classic
An actual fan inside a shell. It cannot loop, because there is no recording - you tune the sound by twisting the housing.
- Type:
- Fan-based (mechanical), not digital
- Sounds:
- One - real moving air
- Controls:
- Two fan speeds plus a rotating tone collar
- Connectivity:
- None. It is a switch and a plug.
What it gets right
- Genuinely non-repeating sound with natural variation
- No app, no account, no subscription, no firmware
- A decade-plus service life is normal for this design
Where it falls short
- One sound only - no rain, no brown noise, no ocean
- The motor is audible as a faint mechanical hum in a silent room
- Mains powered, so it is not a travel device
Skip it if: You want variety, a timer, or an app. This machine does exactly one thing.
Pick 2 · Digital variety without the loop artifact
2. LectroFan EVO
The digital machine that solved the loop problem: 22 sounds generated rather than played back, so there is no seam to notice.
- Type:
- Digital, non-looping synthesis
- Sounds:
- 22, including white, pink and brown noise plus fan sounds
- Volume:
- Precise stepped control across a wide range
- Moving parts:
- None
What it gets right
- Gives you brown and pink noise, which a mechanical fan cannot
- No motor means no mechanical hum and nothing to wear out
- Compact enough to pack
Where it falls short
- Digital sound is still digital - some people hear it as flatter than moving air
- No app or alarm features
- More expensive than budget machines with far longer preset lists
Skip it if: You specifically want the texture of real moving air. Get the Dohm instead.
Questions people actually ask
Are white noise apps as good as machines?
For sound variety, better. For sound quality, usually worse - most app tracks loop, and phone speakers roll off the low frequencies that mask traffic and snoring. The bigger difference is not audio at all: an app requires a phone beside your bed all night.
Should I use my phone as a white noise machine?
As a free week-long trial, definitely - it tells you whether masking helps you before you spend anything. As a permanent arrangement it is worse, because of screen light, notification interruptions and a warm charging phone near the bed.
Do white noise apps drain your battery?
Overnight audio playback does draw meaningful power, so most people charge the phone while it plays - which puts a warm, charging device next to or under bedding. A dedicated machine avoids that entirely.
Is phone screen light at night actually a problem?
A 2022 consensus paper in PLOS Biology recommends keeping light during sleep under about 1 melanopic lux, and Harvard Health notes measurable circadian effects at around 8 lux - dimmer than most table lamps. A phone screen at arm's length is well above both.
What is the best way to use an app without keeping the phone by my bed?
Play it through a small Bluetooth speaker across the room, leave the phone face-down and out of reach on a charger, and turn on do-not-disturb. You keep the variety and lose the screen.
Sources
Back to the best white noise machines.
Read next
- White noise machine vs fanThe other free option already in your house.Read it
- Best white noise machinesIf the app trial worked and you want the phone out.Read it
- How to make a bedroom dark for sleepingThe screen-light problem, in full.Read it
- Best sleep earbudsStream the app, leave the phone across the room.Read it