# Silent Scan

> Silent Scan (iPhone/iPad app by Yasuhiro Kodama.)

- Source: https://appshunter.io/ios/app/silent-scan/id6764492794 (this page in markdown: same URL + `.md`)
- Developer: [Yasuhiro Kodama](https://appshunter.io/developer/1895805086)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 35 MB
- Languages: English
- Released: 2026-05-08
- Data updated: 2026-07-07
- User reviews in markdown: https://appshunter.io/ios/app/silent-scan/id6764492794/reviews.md

## What is Silent Scan?

Silent Scanは、0〜50Hzの低周波域に特化した振動測定・記録アプリです。

  スマートフォン内蔵の加速度センサーを使用し、床や構造物を通じた低周波振動をリアルタイムで検出・可視化します。

  【主な機能】
  ・0〜50Hzのリアルタイム低周波振動測定
  ・低周波域の周波数スペクトル表示
  ・測定履歴の保存と管理
  ・GPS位置情報と連携した測定記録（Premium）

  低周波振動は人が感じにくいにもかかわらず、体調不良や睡眠障害の原因となることがあります。Silent
  Scanは日常では気づきにくい低周波域の振動を可視化し、生活環境の状況把握にお役立てください。

  静かな場所探しや、振動環境の確認にご活用ください。

  【利用規約】
  https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

  Silent Scan is a vibration measurement and recording app specialized for the low-frequency range of 0–50 Hz.

  Using your smartphone's built-in accelerometer, it detects and visualizes low-frequency vibrations transmitted through
  floors and structures in real time.

  [Key Features]
  • Real-time low-frequency vibration measurement (0–50 Hz)
  • Frequency spectrum display for the low-frequency range
  • Save and manage measurement history
  [Key Features]
  • Real-time low-frequency vibration measurement (0–50 Hz)
  • Frequency spectrum display for the low-frequency range
  • Save and manage measurement history
  • Measurement records linked with GPS location data (Premium)

  Although low-frequency vibrations are hard for people to perceive, they can sometimes cause physical discomfort or
  sleep problems. Silent Scan visualizes low-frequency vibrations that are difficult to notice in daily life, helping
  you understand the condition of your living environment.

  Use it to find quieter places or to check the vibration environment around you.

  [Terms of Use]
  https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Plan | $1.99 | per month |



## Version history (last 4 releases)

### 1.0.4 — 2026-07-02

測定履歴の削除機能を追加しました。

・リストを左にスワイプして1件ずつ削除（確認あり）
・詳細画面のメニューから削除
・「すべて削除」でまとめて削除
・削除するとメモ・位置情報・FFTスペクトルも一緒に消えます。
---
Added the ability to delete measurement history.

・Swipe a list item to delete it individually (with confirmation)
・Delete from the menu on the detail screen
・Clear everything at once with "Delete All"
・Deleting also removes the memo, location, and FFT spectrum

### 1.0.3 — 2026-06-04

・振動の周波数測定の精度を改善しました
  ・警告レベルの判定が正しく動作するよう修正しました
  ・全体的な安定性の向上
---------------------------------------------------------------------
  ・Improved the accuracy of vibration frequency measurement
  ・Fixed an issue where the Warning level was not working correctly
  ・General stability improvements

### 1.0.2 — 2026-05-15

・広告表示の改善                                                                                                      
・パフォーマンスの最適化

### 1.0 — 2026-05-08

No release notes.

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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 2026-07-07.*