# dB Logger: Sound Level Meter — Raw dBA SPL meter · No subs > Professional sound level meter, frequency analyzer, and noise logger for iOS. (iPhone/iPad app by BEK Service LTD.) - Source: https://appshunter.io/ios/app/db-logger-sound-level-meter/id6778236281 (this page in markdown: same URL + `.md`) - Developer: [BEK Service LTD](https://appshunter.io/developer/1865488235) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 15.0 · 142 MB - Released: 2026-06-10 - Data updated: 2026-07-06 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/db-logger-sound-level-meter/id6778236281/reviews.md ## What is dB Logger? Free to download. One-time unlock. No subscription, ever. dB Logger turns your phone into a professional-grade sound level meter, frequency analyzer and noise logger — with no account, no cloud, and no subscription, ever. Most sound apps measure your phone's audio AFTER the operating system has "cleaned it up" with echo cancellation, noise suppression and automatic gain. dB Logger doesn't. It captures RAW, UNPROCESSED audio — from the built-in mic or an external USB-C measurement microphone — so what you see reflects the real acoustic field. WHAT PEOPLE USE IT FOR • Measure a noisy neighbor, upstairs bass, or HOA / tenant nuisance — log it over time and export a timestamped CSV + PDF report to attach to a complaint. • Check whether a concert, gig, gym class, bar or restaurant is loud enough to risk your hearing — and how long is safe. • Find out if your baby's white-noise machine is too loud at the crib, and how far to move it. • Assess a room like a consultant: NR and NC single-figure ratings from octave bands for HVAC and building-services work. • Track workplace noise exposure against OSHA, NIOSH or EU limits with the built-in dosimeter. • Check a sound system, studio, AV install or science project with a live spectrum and weighted levels. MEASURE • Real-time dB-A, dB-C, dB-Z with selectable update rate (200 ms to 10 s) • Fast / Slow / Impulse time weighting; current, AVG (Leq), MAX and PEAK • NR (Noise Rating) and NC (Noise Criteria) single-figure room ratings • A noise-source guesser that tells you WHAT is loud, not just how loud VISUALIZE • Live FFT spectrum, 20 Hz – 20 kHz, with peak-hold and peak detection • 1/1 & 1/3-octave equalizer with per-band peak caps • Scrolling time-history graph, color-coded by level • A clean analog dB gauge with AVG / MAX / PEAK LOG, REPORT & SHARE • Log metrics to CSV and raw audio to lossless WAV, independently • Browse saved sessions and generate PDF / CSV reports • Noise Camera: snap a photo or record a video with the live dB reading burned in — clear evidence, easy to share BUILT RIGHT • Guided + manual calibration, saved per microphone profile • USB-C external measurement-mic support, with a visible input picker so you always know which mic you are measuring with • 42 languages; light / dark and Glass / Classic themes • On-device and private — no account, no cloud; your audio and readings never leave your phone unless you choose to share them FREE vs FULL VERSION dB Logger is free to download and fully usable for live measurement — the meter, gauge, spectrum, spectrogram, analyzer and dosimeter are all free and unlimited. The free version also lets you record, export and film video for up to 30 seconds so you can try the whole workflow; those trial clips, exports and reports carry a small "Trial" mark, and the free version keeps two days of dosimeter history. Unlock the full version with a single one-time purchase — no subscription, ever — for unlimited recording, unlimited CSV/WAV/PDF export, full-length video with no watermark, the complete dose history, and no ads. Already bought "Remove Ads"? You're upgraded to the full version automatically, at no charge. Accuracy note: a smartphone microphone is not a certified Class 1/2 (IEC 61672) sound level meter. dB Logger targets reproducible, calibrated relative measurement with standards-correct weighting and rating math. For regulatory or compliance decisions, verify with certified instrumentation. ## Key features - Raw, unprocessed audio capture - Real-time dB-A, dB-C, dB-Z measurements - Frequency analysis (FFT spectrum) - Noise logging and reporting (CSV, PDF) - External microphone support - NR and NC room ratings - Noise-source identification ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Ads | $3.99 | one-time | ## Frequently asked questions about dB Logger ### What is dB Logger used for? dB Logger turns your phone into a professional sound level meter, frequency analyzer, and noise logger. Users employ it to measure noise from neighbors, assess concert loudness, check baby white-noise machines, and evaluate room acoustics for HVAC work. ### Does dB Logger have ads? Yes, dB Logger contains advertisements. Users can remove the single banner ad by making a one-time purchase of $3.99. ### How accurate is dB Logger? dB Logger targets reproducible, calibrated relative measurement with standards-correct weighting and rating math. For regulatory or compliance decisions, it is recommended to verify with certified instrumentation as a smartphone microphone is not a certified Class 1/2 sound level meter. ### Can I export my sound data from dB Logger? Yes, dB Logger allows you to log metrics to CSV and raw audio to lossless WAV, independently. You can browse saved sessions and generate PDF/CSV reports, and even use the 'Noise Camera' feature to capture a photo with the live dB reading burned in. ### Does dB Logger require a subscription? No, dB Logger does not require a subscription. The app offers a one-time purchase option to remove ads, but all features are available for free, with no subscription model. ### What devices is dB Logger compatible with? dB Logger is available for iPhone, iPad, and iPod. It supports iOS devices and is designed to work with both built-in microphones and external USB-C measurement microphones. ### How often is dB Logger updated? The latest version of dB Logger is 3.7, which was last updated on June 23, 2026. Updates typically include feature enhancements and bug fixes. ### Is dB Logger private and secure? Yes, dB Logger is built for on-device and private use. It does not require an account or cloud storage, meaning your audio and readings remain on your phone unless you choose to share them. ## Version history (last 5 releases) ### 4.0 — 2026-06-30 Version 4.0 introduces a full version. dB Logger is now free to download and fully usable for live measurement — the real-time meter, gauge, spectrum, spectrogram, analyzer and dosimeter are all free and unlimited. The free version also lets you record, export and film video for up to 30 seconds, so you can try the whole workflow; those trial clips, exports and reports carry a small "Trial" mark, and the free version keeps two days of dosimeter history. Unlock the full version with a single one-time purchase — no subscription, ever — for unlimited recording, unlimited CSV/WAV/PDF export, full-length video with no watermark, the full dose history, and no ads. If you already bought "Remove Ads", thank you — you're upgraded to the full version automatically at no charge; just tap Restore Purchases in Settings if it doesn't show right away. Thanks for the feedback — keep it coming at bekserviceltd@gmail.com. ### 3.7 — 2026-06-23 Version 3.7 adds detail to the graphs. The equalizer/analyzer now has a third zoom level: tap it to cycle 1/1 → 1/3 → 1/6 octave bands, where 1/6 (61 bands from 20 Hz to 20 kHz) helps you separate close tones — the chip top-right shows the current mode. On the spectrogram you'll find a new draggable frequency cursor: grab the horizontal line and slide it up or down onto a bright streak to read off that streak's frequency, shown live in Hz/kHz. The line is dashed so the streak stays visible underneath, and the knob lights up while you're holding it. Horizontal swipes still page between graphs as before. Thanks for the feedback — keep it coming at bekserviceltd@gmail.com. ### 2.6 — 2026-06-18 Bug fixes and improvements. ### 2.5 — 2026-06-17 Bug fixes and improvements. ### 2.4 — 2026-06-17 A round of fixes from your feedback. The sound-classification label on the meter now appears right away (showing "Listening…" while it settles) instead of looking blank. The microphone icon up top no longer occasionally draws clipped. Exporting a recording as M4A or MP3 now shows a progress dialog with a time estimate and a Cancel button, so a long conversion never looks frozen. External measurement microphones (such as the Dayton iMM-6C) can now always be calibrated — the calibrate option is no longer hidden — and each microphone keeps its own calibration, so calibrating one never changes another. The dosimeter's dose percentage no longer overlaps itself inside the ring, and a steady pure tone is correctly described as a tonal whine rather than an alarm. Plus assorted refinements. ## More apps by BEK Service LTD - [Easy Phone Dial](https://appshunter.io/ios/app/easy-phone-dial/id6757232320) - [Typelux](https://appshunter.io/ios/app/typelux/id6759529988) - [Pet Health Animal Health](https://appshunter.io/ios/app/pet-health-animal-health/id6759711469) - [BallSwipe: Slide Puzzle](https://appshunter.io/ios/app/ballswipe-slide-puzzle/id6761624950) - [BlockBuster: Slide Puzzle](https://appshunter.io/ios/app/blockbuster-slide-puzzle/id6762150093) - [Storytime - Kids Stories](https://appshunter.io/ios/app/storytime-kids-stories/id6763258137) All apps by BEK Service LTD: https://appshunter.io/developer/1865488235 --- *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 2026-07-06.*