# Frequency Analyzer — Audio Spectrum, Spectroid, dB > Professional audio analysis suite with real-time FFT, SPL, and recording capabilities. (iPhone/iPad app by Manfred Kuegel.) - Source: https://appshunter.io/ios/app/frequency-analyzer/id6468837339 (this page in markdown: same URL + `.md`) - Developer: [Manfred Kuegel](https://appshunter.io/developer/1520736594) - Category: Utilities, Music - Price: Free with in-app purchases - Rating: 4.50/5 from 163 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 17.2 · 79 MB - Languages: Russian, Vietnamese, American English, Dutch, European Spanish, Italian, Korean, German (Germany), Polish, Brazilian Portuguese and 6 more - Released: 2025-08-22 - Data updated: 2026-08-31 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/frequency-analyzer/id6468837339/reviews.md ## What is Frequency Analyzer? Transform your device into a professional-grade audio analysis suite with industry-leading 32-bit float processing, precision calibration tools, and comprehensive visualization capabilities. PROFESSIONAL ACOUSTIC MEASUREMENT • Real-time FFT analysis with configurable window sizes up to 4096 points • Reference SPL measurement with calibrated sound pressure level monitoring • Professional microphone correction with frequency-specific calibration curves • Reference tone calibration for precise frequency measurements • Configurable time averaging (0-1000ms) for stable, accurate readings • Industry-standard weighting filters: dBA, dBC, dBZ, and linear magnitude • Multiple window functions: Hanning, Hamming, Blackman ADVANCED VISUALIZATION MODES • High-resolution spectrum analyzer with peak detection • Real-time waveform display • Professional spectrogram • Octave band analysis • Amplitude tracking over time • Total level monitoring with min/max/average statistics POWERFUL RECORDING & ANALYSIS • High-quality 32-bit float audio recording and playback • Synchronized video recording with audio analysis overlay • Event tracking system with timestamped notes • Playback synchronization with all recorded events and measurements • Location mapping for environmental noise surveys • Export capabilities: WAV audio, CSV data, high-resolution images and videos PRECISION DECIBEL MEASUREMENT • Calibrated SPL measurements with reference level adjustment • Real-time dB monitoring with peak hold functionality • Statistical analysis: Leq, Lmax • Configurable time averaging (0-1000ms) • Frequency-weighted noise exposure calculations • Exposure calculator for NIOSH and OSHA IDEAL FOR PROFESSIONALS • Acousticians and audio engineers • Environmental noise consultants • Musicians and sound designers • Room acoustics optimization • Industrial noise monitoring • Educational and research applications • Live sound reinforcement • Building acoustics assessment Download now and unlock the full spectrum of acoustic measurement capabilities. DISCLAIMER This is a consumer application designed for general audio analysis and educational purposes. It is not a certified measurement instrument and should not be used where legally compliant or certified measurements are required. For professional acoustic assessments requiring traceable calibration or regulatory compliance, we recommend using an external calibrated measurement microphone with certified sound level meters. EULA: https://frequency-analyzer.com/terms-and-conditions/ ## Key features - Real-time FFT analysis - Calibrated SPL measurements - 32-bit float audio recording - Synchronized video recording - Spectrogram and octave band analysis - Export WAV, CSV, images, and videos ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Frequency Analyzer Pro Annual | $29.99 | per year | | Frequency Analyzer Pro Monthly | $3.99 | per month | | Frequency Analyzer Pro Monthly | $3.99 | per month | | Frequency Analyzer Pro Weekly | $2.99 | per 7 days | | Frequency Analyzer Pro Annual | $44.99 | per year | | Frequency Analyzer Pro Monthly | $4.99 | per month | | Frequency Analyzer Pro Monthly | $4.99 | per month | | Frequency Analyzer Pro Annual | $44.99 | per year | | Frequency Analyzer Pro Annual | $44.99 | per year | | Frequency Analyzer Pro Monthly | $4.99 | per month | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Pro access for lifetime | $89.99 | one-time | ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/frequency-analyzer/id6468837339/reviews.md ### 1/5 — Hab und will kein pro *2026-08-18* Ich kann nicht fortfahren sobald ich kein pro habe ### 1/5 — Too Soon *2026-08-04* I opened the app for the first time and was asked for a review. At this point, I haven't used the app because of the request for the review. An app that requests a review before even using its main feature is probably not an app worth having. **Developer response:** Hi there, thanks for taking the time to write this. We're trying to balance giving users enough time to experience the app with collecting feedback from as many users as possible, which is what helps us make it better, and we take the point that in your case it came too early. Thanks again. ### 2/5 — Maybe one of the best frequency analyzer out there, but.. *2026-07-23* This application helped me visualize some disturbances I have been experiencing in relation to sound. There is no option for a one time lifetime unlock. I have reached out to the developer and asked if there are any plans for this option. **Developer response:** Hi there, thank you for the kind words and for the detailed feedback. We're glad the app helped you visualise the disturbances you were experiencing, that's exactly what it's built for. On a one time lifetime unlock: we don't offer one at the moment but thanks to your feedback we might add it in the future. If an annual commitment isn't what you want, there's also a monthly plan on the same screen, and it can be cancelled any time in your Apple subscription settings. Thanks again for taking the time to review. ### 1/5 — SCAM *2026-07-01* Open the app, immediately prompts you to rate five stars next is a screen that won’t proceed until you pay. **Developer response:** Hi there, thanks for the feedback. On the rating request, we're trying to balance giving users time to experience the app with collecting feedback from as many users as possible to make it better. On the subscription screen we'd like to clarify one thing: it doesn't require payment to continue and we offer 7 day free trials for all plans. Behind that screen the real-time frequency and spectrum display and the dB measurement are free to use, and the app contains no advertising. Thanks again for taking the time to review. ### 1/5 — Werbung blockt Nutzung *2026-06-28* Kaufen oder nicht nutzen **Developer response:** Hallo, vielen Dank für Ihre Rückmeldung. Zwei Punkte möchten wir gern richtigstellen. Die App enthält keine Werbung, weder Anzeigen noch Werbe-SDKs. Was Sie gesehen haben, war der Hinweis auf das Abo. Und die App lässt sich auch ohne Kauf nutzen: Die Echtzeitanzeige von Frequenz und Spektrum sowie die dB-Messung sind kostenlos, ebenso bis zu drei gespeicherte Messungen und der Export mit Wasserzeichen. Das Abo wird erst benötigt, wenn Sie die erweiterten Funktionen dauerhaft nutzen möchten, also Videoaufnahme, längere Messungen, alle Darstellungsarten und Export ohne Wasserzeichen. Das Abo-Fenster können Sie oben über das X schließen. Falls das X bei Ihnen nicht erschienen ist, wäre das ein Fehler, schreiben Sie uns in dem Fall bitte über den Support-Bereich in den Einstellungen, dann sehen wir uns das an. Vielen Dank für Ihre Bewertung. ### 1/5 — Free? Not at all. *2026-05-16* Free trail for a few days after you add your card details. This is a scam. **Developer response:** Hi there, we're sorry that this came unexpected. We want to assure you this isn't a scam! We offer a 7-day free trial, so you have plenty of time to explore the features and use the app as much as you want while it’s still free. As is standard for the App Store, trials do convert into a paid plan after they expire, but you can easily cancel at any time. ### 2/5 — Bombarded with popups *2026-04-19* Even as a pro user you get bombarded with popups. Surveys, notifications, ... Also the design seems to be straight from ai vibe code **Developer response:** Hi oha-800, thanks for the honest feedback, we appreciate it. We hear you on the popups. Most of them are actually iOS system permission prompts, which we can’t avoid: FrequencyAnalyzer uses the microphone, audio processing, notifications and other hardware APIs, and Apple requires a separate prompt for each one. We do try to keep our own in-app messages (like the occasional survey) to a minimum, especially for Pro users and we’ll keep working to make that even less intrusive. On the design - as a measurement tool, we deliberately keep things minimal and focused on the readings rather than decoration. Thanks again for taking the time to review. ### 1/5 — Useless app *2025-10-25* Not sure why it needs location to analyze frequency. **Developer response:** You can use the location to document your measurements and exports, but you can opt out of using location data in the app. ### 1/5 — Don’t work *2025-10-24* It won’t click past the upgrade app to let me try it **Developer response:** Thank you for your feedback. We are currently investigating an issue in Version 2.9 and already released an update to fix it. ## Frequently asked questions about Frequency Analyzer ### What is Frequency Analyzer used for? Frequency Analyzer transforms your device into a professional audio analysis suite. It offers real-time FFT analysis, SPL monitoring, and detailed visualizations for acoustic measurements. ### Can Frequency Analyzer be used for certified measurements? No, Frequency Analyzer is a consumer application for general audio analysis and educational purposes. It is not a certified measurement instrument and should not be used for legally compliant or certified measurements. ### What are the subscription options for Frequency Analyzer Pro? Frequency Analyzer Pro offers weekly and monthly subscription plans. Weekly plans are $2.99/P7D with a 3-day free trial, while monthly plans range from $3.99/P1M to $4.99/P1M, with various free trial periods. ### What audio analysis features does Frequency Analyzer offer? It provides real-time FFT analysis, reference SPL measurement, microphone correction, reference tone calibration, configurable time averaging, and industry-standard weighting filters like dBA and dBC. ### Does Frequency Analyzer support recording and exporting data? Yes, it supports high-quality 32-bit float audio recording and playback, synchronized video recording, and export capabilities for WAV audio, CSV data, and high-resolution images and videos. ### What visualization modes are available in Frequency Analyzer? Frequency Analyzer features high-resolution spectrum analyzer with peak detection, real-time waveform display, professional spectrogram, octave band analysis, amplitude tracking over time, and total level monitoring. ### How often is Frequency Analyzer updated? The app was last updated on March 31, 2026, with version 2.15. This indicates a relatively frequent update cycle for new features and improvements. ### What is the age rating for Frequency Analyzer? Frequency Analyzer has an age rating of 4+, making it suitable for a wide range of users, including younger individuals interested in audio analysis. ## Version history (last 5 releases) ### 2.18.1 — 2026-08-28 Performance improvements ### 2.18 — 2026-08-20 Performance improvements ### 2.17 — 2026-07-22 Performance improvements ### 2.16.2 — 2026-04-22 Performance improvements ### 2.16.1 — 2026-04-16 Performance improvements ## Apps similar to Frequency Analyzer | App | Rating | Price | Category | | --- | --- | --- | --- | | [Song Recorder](https://appshunter.io/ios/app/song-recorder/id6749884448) | 4.6 (24) | Free | Utilities | | [Copy My Data – Smart Switch](https://appshunter.io/ios/app/copy-my-data-smart-switch/id6748068771) | 4.6 (40) | Free | Utilities | | [Air Finder - find my device](https://appshunter.io/ios/app/air-finder-find-my-device/id6451196878) | 4.9 (24) | Free | Utilities | | [Clicker Counter - TallyKit](https://appshunter.io/ios/app/clicker-counter-tallykit/id6686406165) | 5.0 (9) | Free | Utilities | | [Decibel Meter - dB Noise Level](https://appshunter.io/ios/app/decibel-meter-db-noise-level/id6744018521) | 4.8 (50) | Free | Utilities | | [Click Counter by Clicker](https://appshunter.io/ios/app/click-counter-by-clicker/id6517354896) | 5.0 (17) | Free | Utilities | ## More apps by Manfred Kuegel - [Calm Cat](https://appshunter.io/ios/app/calm-cat/id1520769946) - [Zengine Energy Compass](https://appshunter.io/ios/app/zengine-energy-compass/id1555210196) - [Scanner-App](https://appshunter.io/ios/app/scanner-app/id1633316932) - [No Wifi Games](https://appshunter.io/ios/app/no-wifi-games/id1635792886) - [Frequency Generator](https://appshunter.io/ios/app/frequency-generator/id6468866671) All apps by Manfred Kuegel: https://appshunter.io/developer/1520736594 ## Related topics [frequency analyzer](https://appshunter.io/ios/topics/frequency-analyzer) · [frequency analyzer music](https://appshunter.io/ios/topics/frequency-analyzer-music) · [audio frequency analyzer](https://appshunter.io/ios/topics/audio-frequency-analyzer) · [free noise app analyzer](https://appshunter.io/ios/topics/free-noise-app-analyzer) · [free sound frequency analyzer](https://appshunter.io/ios/topics/free-sound-frequency-analyzer) · [sound frequency meter](https://appshunter.io/ios/topics/sound-frequency-meter) · [audio frequency analyzer free](https://appshunter.io/ios/topics/audio-frequency-analyzer-free) · [sound frequency analyzer](https://appshunter.io/ios/topics/sound-frequency-analyzer) · [frequency detector analyzer](https://appshunter.io/ios/topics/frequency-detector-analyzer) · [frequency meter](https://appshunter.io/ios/topics/frequency-meter) · [manfred kuegel](https://appshunter.io/ios/topics/manfred-kuegel) · [hz frequency measure](https://appshunter.io/ios/topics/hz-frequency-measure) · [ultrasonic detector](https://appshunter.io/ios/topics/ultrasonic-detector) · [ultrasonic analyzer](https://appshunter.io/ios/topics/ultrasonic-analyzer) · [db meter frequency](https://appshunter.io/ios/topics/db-meter-frequency) · [hzdetect](https://appshunter.io/ios/topics/hzdetect) · [hz frequency reader](https://appshunter.io/ios/topics/hz-frequency-reader) · [meterworks vibrometer](https://appshunter.io/ios/topics/meterworks-vibrometer) · [sound measure frequency](https://appshunter.io/ios/topics/sound-measure-frequency) · [frequency meter audio](https://appshunter.io/ios/topics/frequency-meter-audio) --- *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 2026-08-31.*