6 Best Noise Meter Apps for Android and iPhone (2026)
These apps use your phone’s microphone to measure sound levels in decibels, shown as dB. Open the app, give it microphone access, and watch the reading change as the sound around you changes.
The best noise meter apps range from simple tools for quick checks to apps with graphs, saved measurements, and frequency analysis. Your choice depends on your phone and how much information you need.
There is one thing to keep in mind: a phone reading depends on the microphone, the app, and its calibration. Use the results with that limitation in mind, especially when comparing different phones. NIOSH research has found that measurements can vary between devices and apps.
Best Noise Meter Apps at a Glance
| App | Platform | Main use |
|---|---|---|
| NIOSH Sound Level Meter | iPhone | Noise measurements and exposure information |
| Decibel X | Android and iPhone | Everyday checks with detailed displays |
| Sound Meter by Smart Tools | Android | Simple noise-level checks |
| Sound Meter by EXA Tools | Android | Measurement charts and calibration |
| SoundMeter X | iPhone and iPad | Data logging and advanced analysis |
| SPLnFFT Noise Meter | iPhone and iPad | Sound-level and frequency analysis |
App prices and included features can change. Check the current store listing before paying for an upgrade.
1. NIOSH Sound Level Meter
The app comes from the National Institute for Occupational Safety and Health. It was developed to help measure and understand workplace noise exposure, and NIOSH has published research on smartphone sound measurements. It is available for iOS; there is no official Android version.
That background makes it worth considering if you want to learn about noise measurements rather than simply check which room is louder.
For the article’s readers, the most useful part is its clear purpose. It focuses on sound levels and noise exposure instead of filling the screen with unrelated tools.
Why consider it?
- It comes from an organisation that researches occupational noise.
- It provides information beyond a single live reading.
- Its measurement capabilities have been studied.
What to keep in mind: Its accuracy claims apply to particular testing conditions and equipment. Read NIOSH’s guidance before assuming your phone setup delivers the same results.
Best suited to: iPhone users who want a research-backed starting point for understanding noise.
2. Decibel X
Its Android listing includes sound pressure level readings, frequency-weighting options, and noise dosimeter features. Those settings give you more to explore than a basic meter that only shows the current sound level.
For everyday use, start with the main measurement screen. You do not need to understand every setting to compare the sound in your bedroom with the sound near an open window.
The extra controls become more useful once you know what you want to measure. For example, a single loud sound and a steady background hum are different situations, so the highest number alone may not tell the whole story.
Why consider it?
- It offers several measurement settings.
- It suits users who want to move beyond basic checks.
- Its sound displays can help you follow changes over time.
What to keep in mind: Check which tools are included in the free version and which require payment. The presence of advanced features does not, by itself, prove that readings on your phone are accurate.
Best suited to: Users who want an everyday decibel meter app with room to explore more detailed measurements.
3. Sound Meter by Smart Tools
The app uses your phone’s built-in microphone to display noise levels in decibels. It also shows references to help you understand the reading. The developer explains that smartphone microphones are designed mainly for speech, which limits what they can measure well.
That makes this app useful for questions such as, “Is my room quieter with the window closed?” or “Does the fan get louder at its highest speed?”
For comparisons like these, keep the same phone in the same position. Moving it closer to the sound source can change the result even when the source itself stays the same.
Why consider it?
- It has a straightforward purpose.
- Noise references help beginners understand the numbers.
- It is an Android option for quick checks.
What to keep in mind: Very loud or unusual sounds may fall outside the phone microphone’s useful measurement range.
Best suited to: Android users who want a simple noise measuring app for casual comparisons.
4. Sound Meter by EXA Tools
Its store listing describes sound-level measurements, chart displays, and automatic or manual calibration settings. The developer recommends calibration before taking precise measurements.
A chart helps when noise keeps changing. Think about a room beside a busy road: the background may be fairly quiet, but passing vehicles create short increases. Watching the pattern tells you more than glancing at the screen once.
Calibration is useful, but it needs a dependable reference. Adjusting the app until the number “looks right” does not establish accuracy.
Why consider it?
- It displays measurements in a chart.
- It includes calibration controls.
- It can help you observe changing background noise.
What to keep in mind: Calibration cannot remove every limitation of a phone microphone.
Best suited to: Android users who want to follow noise changes and have access to calibration settings.
5. SoundMeter X
The iPhone and iPad app includes sound-level measurement, data logging, noise dosimetry, and spectrum analysis. It also supports sensitivity calibration for audio inputs. Most features require a subscription or a paid licence, according to its listing.
This is the kind of app to investigate when saving measurements matters to you. If you need to compare several sessions, written notes and screenshots can become awkward. Logging tools make that work easier.
For someone who only wants to check a noisy fan occasionally, however, its additional tools may be more than necessary.
Why consider it?
- It includes data-logging features.
- It supports detailed sound analysis.
- It provides controls for audio-input calibration.
What to keep in mind: Check the licence options carefully so you know which features you are buying.
Best suited to: iPhone and iPad users who need saved measurements and advanced analysis.
6. SPLnFFT Noise Meter
Its iPhone and iPad listing includes a frequency analyser, frequency meter, test signal generator, and dosimeter. The developer also provides a manual explaining measurement settings.
Frequency analysis answers a different question from a basic decibel reading. A decibel reading describes the measured level. Frequency information helps you examine whether the sound contains more low-frequency rumble, higher-pitched tones, or a mixture.
If you are interested in audio, those details may be useful. If you only want to know whether one room is quieter than another, a simpler app will be easier to learn.
Why consider it?
- It combines noise readings with frequency analysis.
- It includes several additional audio tools.
- A manual is available for learning the controls.
What to keep in mind: You will get more from the app if you spend time understanding its measurement settings.
Best suited to: Users who want to explore both sound levels and frequency content.
How to Choose the Best Noise Meter App
Start with what you want to check.
For occasional measurements around the house, look for a clear live reading and an easy-to-understand display. For repeated checks, saved measurements or a chart may matter more.
Before installing a sound level meter app, check:
- Phone compatibility: Some apps are available only for iPhone.
- Free features: Make sure the measurement you need is included.
- Calibration: Look for clear instructions, not just an adjustment slider.
- Saved results: Useful if you want to compare measurements later.
- Ease of use: A crowded screen can make a simple task harder.
You do not need the app with the longest feature list. Choose the one that helps you answer your question.
Are Noise Meter Apps Accurate?
They can provide useful information, but accuracy varies.
The phone’s microphone, audio processing, app settings, and calibration all affect the result. NIOSH research found wide variation in measurements from Android devices, including differences when using the same app on different phones.
For casual comparisons, consistency helps. Use the same phone, app, settings, and position each time. This gives you a better basis for comparing your own readings.
If a measurement needs to meet a specific professional standard, check the required equipment and procedure. Do not assume a downloaded app automatically meets that requirement.
How to Measure Noise With Your Phone
You can make your checks more consistent with a few simple habits.
- Allow microphone access. The app needs it to measure sound.
- Keep the microphone uncovered. Your hand or phone case may block it.
- Choose a fixed position. Keep the same distance from the source when comparing readings.
- Avoid handling the phone during measurement. Movement can introduce unwanted sound.
- Measure over a period of time. A brief glance may miss changes.
- Note the conditions. Record whether doors and windows were open and which appliances were running.
If the app offers calibration, follow its instructions and use a suitable reference meter.
Free vs Paid Noise Meter Apps
A basic app may be enough for checking background noise or comparing two locations.
Paid tools become more useful when you need logging, exports, frequency analysis, or control over measurement settings. SoundMeter X, for example, places most of its advanced features behind a subscription or paid licence.
Try the basic functions first. If they answer your question, there may be little reason to buy more features.
Which Noise Meter App Should You Choose?
For iPhone users, NIOSH Sound Level Meter is a sensible starting point because its development and measurement research are clearly documented.
For simple Android checks, consider Sound Meter by Smart Tools or EXA Tools. Decibel X is worth exploring if you want more settings.
For detailed audio work, look at SoundMeter X and SPLnFFT. Read their feature lists and manuals before paying, especially if you need a particular measurement or export format.
These choices are based on published features and documentation. They should not be read as a hands-on accuracy ranking across every phone.
FAQs
What is a noise meter app?
A noise meter app uses your phone’s microphone to measure sound levels and display them in decibels.
Can my phone measure noise in decibels?
Yes, with a compatible app. The accuracy depends on your phone, the app, its settings, and calibration.
Is NIOSH Sound Level Meter available for Android?
No. The official NIOSH Sound Level Meter app is available for iOS.
How do I calibrate a noise meter app?
Follow the app’s instructions and compare it with a suitable reference sound level meter. Guessing an adjustment does not confirm accuracy.
Can I use a noise meter app to check noisy neighbours?
You can use it to observe noise levels inside your home. Note the time, phone position, and measurement conditions so your comparisons remain consistent.
Does paying for an app make it more accurate?
Payment may unlock additional tools, but it does not remove the limitations of your phone’s microphone.
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