# bismark bs-spectrum — Spectrum Analyzer

> Real-time audio spectrum analyzer with FFT for sound frequency visualization. (iPhone/iPad app by bismark LLC.)

- Source: https://appshunter.io/ios/app/bismark-bs-spectrum/id327802142 (this page in markdown: same URL + `.md`)
- Developer: [bismark LLC](https://appshunter.io/developer/1213793300)
- Category: Music, Utilities
- Price: $3.99
- Rating: 3.00/5 from 2 App Store ratings · 30 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 26 MB
- Languages: American English
- Released: 2009-08-29
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/bismark-bs-spectrum/id327802142/reviews.md

## What is bismark bs?

bismark bs-spectrum is a precise and responsive real-time audio spectrum analyzer using FFT (Fast Fourier Transform). It captures sound through your iPhone or iPad’s built-in microphone and visualizes the frequency spectrum with clarity.

Key Features:
• Real-time FFT analysis of audio input
• Peak frequency and amplitude detection
• Snapshot function for waveform comparison
• Customizable display options

Display Modes:
• Graph Scale: Linear / Logarithmic
• FFT Window: Rectangle, Hamming, Hanning, Blackman
• Decay Time: From 250 ms to 4 seconds
• Amplitude Offset control

Ideal for:
• Audio engineers
• Musicians and producers
• Sound designers
• Educational purposes in acoustics or signal processing

bismark bs-spectrum provides a clean and accurate analysis experience, ideal for professionals and learners alike.

## Key features

- Real-time FFT audio analysis
- Peak frequency and amplitude detection
- Snapshot function for waveform comparison
- Customizable graph scale and FFT window
- Adjustable decay time and amplitude offset

## Recent user reviews (10 of 30)

All indexed reviews: https://appshunter.io/ios/app/bismark-bs-spectrum/id327802142/reviews.md

### 1/5 — need in proving not good

*2025-12-13*

this app cant set db any lower not good to use for in a quiet room also quite need to see on a low settings l, hard to quit program 
i delete it not with i to keep it
and best you to adjust the app better then this one ty.

### 2/5 — Could have been more useful

*2024-12-30*

This app would be very useful when running on a Mac, you could actually select the input source. At the moment it only accepts the microphone, but using other input sources such as a USB audio interface opens up the option to review sounds from external instruments, synthesizers etc…  for that reason its 2 star for me, could have been 4 - 5 perhaps…

### 1/5 — Did not work

*2023-01-02*

installed on Mac M2 Air, and it did nothing!  How do I uninstall it and get my money back?

### 4/5 — iOS16でも動くように

*2022-10-20*

iOS16にしてから動かなくなったので
代替えのアプリを探していましたが
どれもイマイチで前のiPhone引っ張り出して
使ってましたが…
ついにアップデート対応してくれたので
助かりました！

仕事で目安に使ってるので
ほんと助かってます。

### 5/5 — iOS 16対応のお願い

*2022-09-16*

ずっとお世話になってます。
iOS16で、正常に動きません。
対応して頂けるとありがたい。

**Developer response:** ありがとうございます。急ぎ対応策検討中ですのでアップデートをお待ちください。

### 5/5 — Very clean App.

*2021-04-01*

Developer has used the "keep it simple stupid," (KISS) development mode. Easy simple intuative interface. Works well on M1 Mac mini. With a wide variety of USB microphones, from the cheap low end, to pro level mics. Vaery basic, but very well worth the money. Would be nice to vary the FFT bin levels. CUDOS to the develolper!

### 4/5 — これなら低域無いほうがいい

*2016-02-27*

他の方も書かれてますが、低域がまったく役に立っていません。
iPhoneのマイクの特性もあるとは思いますが、低域が常に大きく振れているせいで、ピークチェックの機能も意味をなさないことが多いです。
これなら低域ははなからカットされていたほうが使いやすいかと思います。

ただこの価格で気軽に使えるアナライザとしてはいいと思います。

### 3/5 — 周波数帯域が狭いが優れもの

*2014-12-28*

マイク性能に関わらず、20000まで表示してください。

### 5/5 — 素晴らしいアプリです

*2013-12-04*

始めまして。
還暦過ぎの回路設計エンジニアです。まだ社会参加を継続しています。

素晴らしいアプリです。ありがとうございます。

現在開発中の製品で、オーディオ周波数のスペアナが欲しかったのですが、高価な製品は購入できずどうしたものかとヤフオクなどで探していました。ところがこのアプリを見つけまして、多いに活用させて頂く予定です。今、マイク経由ではなく直接電気信号を入力するプローブを作製中です。

ところでVerUpの予定は無いのでしょうか？
スペクトルの数値データが採れればいいのですが。。。。

実は、ステレオオーディオなどとは全く無関係な製品の標準アプリにならないかとぼんやりですが考えています。もしそのようになれば1年後くらいには月に50本位は使用することになると思っています。
開発が予定どうり立ち上がればの話ですが。

数値データが得られれば、各種の解析を行い、開発中の製品で、目的の診断結果が得られることになります。

ご検討いただければ幸いです。

### 5/5 — 非常不错的软件！极力推荐！

*2013-07-05*

非常实用的专业音频频谱分析器，对声波的分析很清晰实在。可以让初学者了解FFT的基本概念及原理。
如果有保存测试画面功能的话会更好！

## Frequently asked questions about bismark bs

### What is bismark bs-spectrum used for?

bismark bs-spectrum is a precise real-time audio spectrum analyzer that uses FFT to visualize sound frequencies captured by your device's microphone. It's ideal for audio engineers, musicians, and students of acoustics.

### What devices does bismark bs-spectrum support?

bismark bs-spectrum is available for Mac, iPhone, iPad, and iPod. It requires iOS 11.0 or later for mobile devices.

### How much does bismark bs-spectrum cost?

bismark bs-spectrum is a paid application priced at $3.99. There are no in-app purchases or subscriptions associated with this app.

### Does bismark bs-spectrum have ads?

No, bismark bs-spectrum does not contain advertisements. It offers a clean and uninterrupted analysis experience.

### How often is bismark bs-spectrum updated?

The latest version, 3.0.3, was released on April 5, 2026. While the last update date is in the future, indicating potential for future updates, the app was initially released in 2009.

### What are the display options in bismark bs-spectrum?

You can customize the graph scale to Linear or Logarithmic, choose from various FFT windows like Rectangle, Hamming, Hanning, and Blackman, and adjust decay time from 250 ms to 4 seconds, along with amplitude offset control.

### What is the age rating for bismark bs-spectrum?

bismark bs-spectrum has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content.

### What is the user feedback on bismark bs-spectrum?

Based on the provided data, bismark bs-spectrum has a rating of 3.0 stars from 2 ratings. This suggests a mixed reception from its limited user base.

## Version history (last 5 releases)

### 3.0.3 — 2026-04-05

Fixed an issue where the Settings screen would unexpectedly close on iPad.

### 3.0.2 — 2026-03-25

Support the latest OS versions and improve UI

### 3.0.1 — 2025-07-10

Support the latest OS versions

### 3.0.0 — 2024-08-12

Support the latest OS version

### 2.8.1 — 2024-06-21

Update for the latest iOS / iPadOS versions

## Apps similar to bismark bs

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Audio Spectrum Analyzer dB RTA](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790) | 4.5 (3,042) | Free | Music |
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| [RTA Audio](https://appshunter.io/ios/app/rta-audio/id525324684) | 3.6 (31) | Free | Music |
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## More apps by bismark LLC

- [bismark MagicBoard](https://appshunter.io/ios/app/bismark-magicboard/id376525955)
- [bismark bs-16i](https://appshunter.io/ios/app/bismark-bs-16i/id388149926)
- [bismark MagicBoard Mini](https://appshunter.io/ios/app/bismark-magicboard-mini/id388634980)
- [bismark DamperPedal - CC#64](https://appshunter.io/ios/app/bismark-damperpedal-cc64/id524122745)
- [bismark LeftHanded](https://appshunter.io/ios/app/bismark-lefthanded/id601767831)

All apps by bismark LLC: https://appshunter.io/developer/1213793300

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*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 2026-08-26.*