# Decibel : dB sound level meter — Audio noise Spectrum Analyzer > Mobile sound level meter and audio spectrum analyzer with sleep tracking. (iPhone/iPad app by Vlad Polyanskiy.) - Source: https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1227650795 (this page in markdown: same URL + `.md`) - Developer: [Vlad Polyanskiy](https://appshunter.io/developer/438646985) - Category: Utilities, Health & Fitness - Price: Free with in-app purchases - Rating: 4.60/5 from 36,118 App Store ratings · 507 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 56 MB - Languages: Russian, Hindi, Vietnamese, American English, European Spanish, Italian, Korean, German (Germany), European Portuguese, Chinese (Traditional, Taiwan) and 4 more - Released: 2017-05-04 - Data updated: 2026-08-29 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1227650795/reviews.md ## What is Decibel? Decibel turns your device into a powerful sound level meter without any extra hardware. Measure ambient noise in real time, monitor sound levels (dB), and explore frequencies with the built-in Spectrum Analyzer. Capture reliable sound and noise data wherever you are. Designed for casual users, audio enthusiasts, and sound engineers, Decibel works as a portable sound meter for quick sound checks or deeper audio analysis. Use it to easily check noise levels, test room acoustics, monitor workplace noise, or fine-tune audio equipment. Decibel has various advanced features, including saving and exporting noise measurement data, live sound level overlays for photos and videos, and exporting data to the Health app to track noise exposure over time. “The best way to meter sound levels” — AppAdvice SLEEP TRACKING AND SOUND RECOGNITION Decibel’s sleep tracking and smart sound recognition help you understand your sleep environment and nighttime noise. While sleep tracking is active, the app can detect common sleep sounds such as snoring, coughing, talking, and other household or environmental noise that may affect sleep quality. Each detected sound appears on a detailed sleep timeline, so you can see exactly when disruptions occurred and play back the related audio. This makes it easier to identify snoring patterns, sleep disturbances, and noise events that impact your rest. All sleep sound recognition and audio analysis are performed entirely on your device using advanced on-device machine learning. Recordings stay private, are processed locally, and never leave your device. KEY FEATURES - Visualize ambient sound levels and decibel (dB) readings in real time - Sync with the Health app to track and export noise exposure data - Add live sound level overlays to photos and videos - Save sound measurements with location data and custom labels - Record, store, export, and play back sound measurements - Export sound and noise data in CSV or audio formats SPECTRUM ANALYZER - Integrated Spectrum Analyzer with FFT and spectrogram modes - Multiple FFT sizes up to 16,384 points with selectable window functions - Flexible visualization modes and graph styles - Octave Band Real-Time Analyzer (RTA) for detailed frequency analysis EXTERNAL MICROPHONES AND CALIBRATION - Support for external microphones - Calibrate connected microphones directly in the app - Create and manage custom profiles for different microphones REPORTING AND EXPORT - Generate detailed noise measurement reports, including LAeq values - Batch export multiple measurements in supported formats Decibel app is not a replacement for professional devices and should be used for personal purposes only. By using this app, you acknowledge and agree that the developers and publishers are not liable for any decisions made based on the information provided by the app. SUBSCRIPTIONS Decibel offers optional subscriptions that unlock advanced tools and ongoing feature enhancements. With a subscription, you get access to an expanding set of professional Spectrum Analyzer features, advanced sound level weighting modes, and continued updates for compatibility with new devices and hardware. Subscriptions also include support for external microphones, unlimited saving and exporting of measurements, batch export tools, and audio and video exports with sound level overlays. Payment will be charged to your Apple account at confirmation of purchase. Subscriptions renew automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. You can manage or disable auto-renewal at any time in your Apple ID account settings. By downloading and using the app, you agree to the following: Terms of Use: https://www.iubenda.com/terms-and-conditions/94359518 Privacy Policy: https://www.iubenda.com/privacy-policy/94359518 Disclaimer: http://dbmeterpro.com/disclaimer.html Questions or feedback? Contact us at support@decibelpro.app ## Key features - Real-time decibel (dB) sound level monitoring - Integrated Spectrum Analyzer (FFT, spectrogram) - Sleep tracking with sound recognition - Noise exposure data export to Health app - Add sound level overlays to photos/videos - Save, export, and playback sound measurements ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Premium Mode Subscription | $9.99 | per month | | Premium Mode | $29.99 | per year | | Premium Mode | $7.99 | per month | | Premium Mode | $1.99 | per 7 days | | Premium Plus | $4.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Decibel Meter Pro | $19.99 | one-time | | Spectrum Analyzer Pack | $24.99 | one-time | | dB Meter Premium Pack | $49.99 | one-time | | dB Meter Pro | $4.99 | one-time | | Noise Dosimeter Pro | $9.99 | one-time | ## What do users think of Decibel? Overall sentiment: neutral **Pros** - 👍 Useful for monitoring noise levels - 🔍 Accurate for a phone app - 🔧 Good for calibrating audio equipment - 💡 Helpful for hearing protection - 📊 Provides detailed measurements **Cons** - 💰 Aggressive upselling tactics - 🔒 Privacy concerns around data collection - 🕹️ Confusing free vs paid options - 🔁 Recurring subscription issues - 🔢 Inconsistent/inaccurate readings **Commonly reported bugs** - App crashes or freezes during use - Subscription issues and unwanted charges - Microphone compatibility problems **Most requested features** - Add option to set noise level alerts - Improve geolocation and recording features - Allow audio playback while using the app - Provide more calibration options ## Recent user reviews (10 of 507) All indexed reviews: https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1227650795/reviews.md ### 5/5 — Use this app to check the decibels surrounding you *2026-08-13, version 9.5.3* One if you use plus you can actually check everything and also I actually recommend you getting plus I mean not plus premium, and plus download this app because this app is the best app to check your decibels ### 1/5 — App no longer useable *2026-08-04, version 9.5.3* I bought this app before it went to subscription service and now it will not work unless I subscribe. Is there a way to gain access for those of us who bought this app before it was subscription? I believe we should be grandfathered in since we agreed to pay for the use of the app at the time of purchase. This feels like breach of contract. ### 5/5 — 제작자님 부탁드려요!! *2026-07-26* 이 앱을 사용할 때 카메라라는게 있는데, 동영상으로 하고 싶었습니다. 근데 자기 반대편만 할 수 있어서 불편했습니다. 제작자님 제 리뷰를 보신다면 업데이트 할 때 참고해주세요!! ### 1/5 — Doesn’t work with AirPods Pro even after buying Premium Pack. *2026-07-10, version 9.5.3* I bought the Premium Pack - supposedly with all features included - because I saw it had a lot of potential use for me. Really wanted to use it with my AirPods Pro but the app always said they weren’t connected even though they were. No response from dev after logging an issue a few days ago. At this price I expect both that it works without hassle and if there’s issue a prompt response from the dev team. ### 1/5 — Keeps freezing up *2026-07-06, version 9.5.3* I recently purchased the one year membership as things were working good, all of a sudden it will freeze up and stay at zero or whatever DB number it’s at. Next, I have to unplug, the microphone restart the app plug everything back in and sometimes it works. Sometimes it doesn’t. There are times I don’t have time to do that during a service. I need the DB information as soon as it hits the meter. Please fix the bug or I will request a refund. With Respect, Professor Bobby Glass Navy Veteran (AW/SW) ### 1/5 — Forced to pay to save *2026-06-08, version 9.5.3* Can no longer save videos without paying ### 1/5 — Not free *2026-05-30, version 9.5.3* Not cool to advertise it as if its free… ### 5/5 — love it *2026-05-27, version 9.5.3* the user experience has been exceptional!! ### 5/5 — Countless Features, No Greed *2026-04-26, version 9.5.3* This app is a diamond in the rough for a hobbyist or enthusiast. Even the free version offers more customizability and options than most other audio visualizers, with an FFT plot, spectrogram, dB reader, etc., and it can all be recorded and transferred. It’s a great all-in-one audio analysis tool with a low skill floor and high skill ceiling. ### 1/5 — Not fit for purpose *2026-04-17, version 9.5.3* Reports dBZ values below dBA or dBC, and so is inherently incorrect and unreliable ## Frequently asked questions about Decibel ### What does the Decibel app do? Decibel transforms your device into a powerful sound level meter and audio analyzer. It allows you to measure ambient noise in real time, monitor decibel levels, and explore sound frequencies using its integrated Spectrum Analyzer. The app also features sleep tracking with smart sound recognition to identify nighttime disruptions. ### What are the key features of Decibel? Key features include real-time visualization of ambient sound levels and decibel readings, integration with the Health app for noise exposure tracking, the ability to add live sound level overlays to photos and videos, saving sound measurements with location data, and recording, storing, exporting, and playing back sound measurements. It also offers an advanced Spectrum Analyzer with FFT and spectrogram modes. ### How does the sleep tracking feature work? The sleep tracking feature uses smart sound recognition to detect common sleep sounds like snoring, coughing, or talking, as well as other household or environmental noises that might affect sleep quality. Detected sounds are displayed on a detailed sleep timeline, allowing you to see when disruptions occurred and play back the related audio for analysis. All processing is done on-device for privacy. ### Is Decibel free to use? Decibel offers optional subscriptions that unlock advanced tools and ongoing feature enhancements. While the app provides core sound measurement functionalities, certain advanced features and continuous updates are available through these subscriptions. The app also has in-app purchases and may display ads. ### Can I use external microphones with Decibel? Yes, the app supports external microphones. You can calibrate connected microphones directly within the app and create custom profiles for different microphones. This allows for more precise and tailored audio measurements. ## Version history (last 5 releases) ### 9.5.3 — 2026-02-12 • UI optimizations for iPhone Air • In some rare cases, audio processing caused the app to crash on iOS versions prior to 26. This update may fix this issue. Do you like the new version of the app? Share your review on the App Store. Do you dislike anything about it? All the more reason to say something! Your comments help make the app better and I'm value them greatly so don't hesitate to share them. ### 9.5.2 — 2025-12-02 • UI optimizations • Minor bugfixes Do you like the new version of the app? Share your review on the App Store. Do you dislike anything about it? All the more reason to say something! Your comments help make the app better and I'm value them greatly so don't hesitate to share them. ### 9.5.1 — 2025-09-14 • App crash fix on Video overlay export Do you like the new version of the app? Share your review on the App Store. Do you dislike anything about it? All the more reason to say something! Your comments help make the app better and I'm value them greatly so don't hesitate to share them. ### 9.5 — 2025-09-05 • iOS 26 support • Up to 8 hours autosave time • Improved readability of file names when exporting Do you like the new version of the app? Share your review on the App Store. Do you dislike anything about it? All the more reason to say something! Your comments help make the app better and I'm value them greatly so don't hesitate to share them. ### 9.4.1 — 2025-07-03 • Fixed issue with video export • UI optimizations • Minor bugfixes Do you like the new version of the app? Share your review on the App Store. Do you dislike anything about it? All the more reason to say something! Your comments help make the app better and I'm value them greatly so don't hesitate to share them. ## Apps similar to Decibel | App | Rating | Price | Category | | --- | --- | --- | --- | | [Decibel X:dB Sound Level Meter](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923) | 4.6 (161,260) | Free | Utilities | | [Decibel X PRO: dBA Noise Meter](https://appshunter.io/ios/app/decibel-x-pro-dba-noise-meter/id1257651611) | 4.7 (6,897) | $69.99 | Utilities | | [Noise Guru: Decibel Meter](https://appshunter.io/ios/app/noise-guru-decibel-meter/id6444836813) | 4.6 (299) | Free | Utilities | | [dB Meter & Spectrum Analyzer](https://appshunter.io/ios/app/db-meter-and-spectrum-analyzer/id733773616) | 4.7 (865) | $29.99 | Utilities | | [Decibel Meter Sound Level pro](https://appshunter.io/ios/app/decibel-meter-sound-level-pro/id6737704013) | 4.5 (28) | Free | Utilities | | [Decibel Meter detector sound](https://appshunter.io/ios/app/decibel-meter-detector-sound/id6689517462) | 4.8 (35) | Free | Utilities | ## More apps by Vlad Polyanskiy - [Light Meter - measure luminosity in lux, fc, lumen](https://appshunter.io/ios/app/light-meter-measure-luminosity-in-lux-fc-lumen/id642285909) - [Pyrography - burning a design on wood](https://appshunter.io/ios/app/pyrography-burning-a-design-on-wood/id663655040) - [dB Meter & Spectrum Analyzer](https://appshunter.io/ios/app/db-meter-and-spectrum-analyzer/id733773616) - [Find a Cat](https://appshunter.io/ios/app/find-a-cat/id738257888) - [Color Name AR Pro](https://appshunter.io/ios/app/color-name-ar-pro/id904152346) - [Color Name AR](https://appshunter.io/ios/app/color-name-ar/id906955675) All apps by Vlad Polyanskiy: https://appshunter.io/developer/438646985 ## Related topics [volume meter](https://appshunter.io/ios/topics/volume-meter) · [rta tool](https://appshunter.io/ios/topics/rta-tool) · [db sound level meter](https://appshunter.io/ios/topics/db-sound-level-meter) · [vlad polyanskiy](https://appshunter.io/ios/topics/vlad-polyanskiy) · [db meter sound](https://appshunter.io/ios/topics/db-meter-sound) · [db meter wifi](https://appshunter.io/ios/topics/db-meter-wifi) · [db meter frequency](https://appshunter.io/ios/topics/db-meter-frequency) · [db meter level](https://appshunter.io/ios/topics/db-meter-level) · [r128x loudness measuring tool](https://appshunter.io/ios/topics/r128x-loudness-measuring-tool) · [dbmeter](https://appshunter.io/ios/topics/dbmeter) · [frequency meter audio](https://appshunter.io/ios/topics/frequency-meter-audio) · [db meter free sound](https://appshunter.io/ios/topics/db-meter-free-sound) · [db meter free level](https://appshunter.io/ios/topics/db-meter-free-level) · [db meter pro](https://appshunter.io/ios/topics/db-meter-pro) · [db noise meter](https://appshunter.io/ios/topics/db-noise-meter) · [octave noise](https://appshunter.io/ios/topics/octave-noise) · [decibel meter noise db reader](https://appshunter.io/ios/topics/decibel-meter-noise-db-reader) · [dB meter app](https://appshunter.io/ios/topics/db-meter-app) · [audio test](https://appshunter.io/ios/topics/audio-test) · [dzb](https://appshunter.io/ios/topics/dzb) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*