# Spektroskop > Real-time spectrum analyzer for iOS devices with high accuracy and calibration features. (iPhone/iPad app by Andreas Wagner.) - Source: https://appshunter.io/ios/app/spektroskop/id517486614 (this page in markdown: same URL + `.md`) - Developer: [Andreas Wagner](https://appshunter.io/developer/517486617) - Category: Utilities, Music - Price: $9.99 - Rating: 5.00/5 from 4 App Store ratings · 13 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 2 MB - Languages: American English, German (Germany) - Released: 2012-04-21 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/spektroskop/id517486614/reviews.md ## What is Spektroskop? Add precision to your pocket! Spektroskop is an easy-to-use yet powerful real-time spectrum analyzer, which takes accuracy seriously. Analyze, measure, compare and save sound spectra captured with the internal microphone or any other audio source connected to your iOS device. The built-in microphone calibration for iPhone and iPad even allows to measure absolute sound pressure levels (SPL) with high precision. Spektroskop is the perfect tool for sound engineers, acousticians and everybody else with eyes and ears. FEATURES + real-time, high accuracy FFT analysis from 20 Hz to 20 kHz + built-in microphone calibration for all iPhone and iPad models + built-in calibration and frequency equalization for the MicW i436 microphone + built-in calibration and frequency equalization for the Microtech Gefell M372 microphone + free field and diffuse field equalization for all internal iPhone microphones and MicW i436 + frequency weighting dB(A) and dB(C) + time weighting Fast, Slow and Average + optional octave and third-octave band display + hold and compare function for up to four spectra + adjustable decay rate and averaging function + CSV data export to iCloud Drive, Dropbox, Numbers, etc. + universal App for iPhone and iPad (limited support for iPod Touch) Visit http://SpektroskopApp.com for more detail! ## Key features - Real-time FFT analysis (20 Hz - 20 kHz) - Built-in microphone calibration - Support for external microphones - Frequency weighting (dB(A), dB(C)) - Octave and third-octave band display - Hold and compare up to four spectra - CSV data export ## Recent user reviews (10 of 13) All indexed reviews: https://appshunter.io/ios/app/spektroskop/id517486614/reviews.md ### 5/5 — Excellent app *2025-06-29* I’m a physicist and I teach acoustics in some of my courses. This app has been really useful for showing my students the frequency components of various sonic disturbances. I’m also a musician and have used it in other contexts as well. It’s a great app and very effective. ### 5/5 — Excellent *2023-12-20, version 4.2.7* Meilleur rapport qualité prix ### 5/5 — Excellent tool used for evaluating performance of our fleet of natural Gas Gensets *2017-05-23* Thanks for hard work keeping up with latest operating environments and iphone models. This is a valuable tool for real world engineering test. ### 5/5 — Great app, very useful *2014-12-04* As a 20-year audio pro, I find this a handy little tool for quick measurements and problem-solving. Love the pause feature and the screenshot export. For live rooms or in the studio, this app is no-nonsense, efficient, and quick. ### 5/5 — Très utile et fonctionnel *2013-05-25, version 2.1.0* Super app. Fonctionne bien. Les différentes vues permettent de faire des comparaisons et des analyses différentielles pertinentes. ### 4/5 — Fast and Accurate *2013-04-30, version 2.1.0* This spectrum analyzer is fantastic. It is calibrated perfectly against my audio test CD. If the built in mic had a decent response into the ultrasonic range, this app could replace industrial test equipment designed to pinpoint air leaks. ### 5/5 — Very Pleased *2013-04-25* This has been a helpful and easy to use tool. It makes you wonder why the hardware gear is so expensive. All of them simply get you in the general ballpark then your ears do the rest. I don't believe that getting this app will be a regret if it saves your mix or ears just once. Just my humble opinion. ### 5/5 — Cost vs performance *2013-04-21* An exceptional value ### 5/5 — Room Acoustics *2013-02-04* I am quite pleased with this app. My interest is room acoustics, especially Meeting Rooms for unprogrammed Quakers (Religious Society of Friends). Two Meeting Rooms of quite designs struggle with noise from furnace fans. With this app in my iPhone I easily made simply analyses. Thanks for this great app! ### 5/5 — Awsome and well designed! *2013-01-06, version 2.0.3* Thiis app is awsome and very well designed. It is espescially usuefull when you are looking for an anoying noise like "The Hum". You are able to really see and isolate the noise on the scope. This way you will be able to prove you are not the only one hearing the noise, you idevice will hear it too. ## Frequently asked questions about Spektroskop ### What is Spektroskop? Spektroskop is a real-time spectrum analyzer for iOS devices that allows you to analyze, measure, compare, and save sound spectra. It offers high accuracy and features like built-in microphone calibration. ### What devices does Spektroskop support? Spektroskop is a universal app for iPhone and iPad, with limited support for iPod Touch. It requires iOS devices. ### How accurate is Spektroskop? Spektroskop is designed for high accuracy, featuring real-time FFT analysis from 20 Hz to 20 kHz. Built-in microphone calibration for iPhones and iPads allows for precise measurement of absolute sound pressure levels (SPL). ### Can I export my data from Spektroskop? Yes, Spektroskop allows CSV data export to services like iCloud Drive, Dropbox, and applications such as Numbers, enabling further analysis and sharing of your captured spectra. ### Does Spektroskop have ads? No, Spektroskop does not contain advertisements. It is a paid application designed for professional use without interruptions. ### What is the price of Spektroskop? Spektroskop is available for a one-time purchase of $9.99. There are no subscription fees or in-app purchases required to access its full functionality. ### How often is Spektroskop updated? The latest version of Spektroskop is 4.2.7, last updated on January 17, 2022. Updates typically include improvements to accuracy, compatibility, and new features for sound analysis. ### What is the age rating for Spektroskop? Spektroskop has an age rating of 4+, indicating it is suitable for users of all ages. The app's functionality is technical and educational in nature. ## Version history (last 5 releases) ### 4.2.7 — 2022-01-17 This update adds support for iPhone 12/Pro and 13/Pro and the latest iPad Air, iPad Pro and iPad Mini models. Happy measuring! ### 4.2.6 — 2020-08-04 This update adds support for iPhone 11/Pro/SE and the latest iPad and iPad Pro models. Happy measuring! ### 4.2.5 — 2019-01-16 Hi there! This update catches up with the year 2019 and adds support for iPhone XR/XS and the current iPad/iPad Pro lineup. Thanks for your patience and happy measuring! ### 4.2.4 — 2017-11-02 This version adds support for the new iPhone X screen and fixes some small bugs. Microphone calibration for iPhone 8 and iPhone X will follow with the next update – stay tuned! Thank you for using Spektroskop! ### 4.2.3 — 2017-06-06 This update removes the broken calibration for iPadPro – sorry everyone. A working calibration for iPadPro (including the new model presented at WWDC) will be included in the next update. ## Apps similar to Spektroskop | App | Rating | Price | Category | | --- | --- | --- | --- | | [Sound Spectrum Analysis](https://appshunter.io/ios/app/sound-spectrum-analysis/id1434975523) | 3.6 (41) | Free | Utilities | | [Decibel Meter - Sound Analyzer](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id1579747105) | 3.7 (36) | Free | Utilities | | [Audio Frequency Analyzer](https://appshunter.io/ios/app/audio-frequency-analyzer/id684641742) | 3.7 (3) | $9.99 | Utilities | | [Decibel : dB sound level meter](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1227650795) | 4.6 (36,014) | Free | Utilities | | [Decibel X PRO: dBA Noise Meter](https://appshunter.io/ios/app/decibel-x-pro-dba-noise-meter/id1257651611) | 4.7 (6,850) | $69.99 | Utilities | | [Decibel X:dB Sound Level Meter](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923) | 4.7 (155,562) | Free | Utilities | --- *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 2026-06-10.*