# 音耳せん — OtoMimiSen

> OtoMimiSen (iPhone/iPad app by koji kamogawa.)

- Source: https://appshunter.io/ios/app/id1496478545 (this page in markdown: same URL + `.md`)
- Developer: [koji kamogawa](https://appshunter.io/developer/1488210713)
- Category: Utilities, Music
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 29 MB
- Languages: American English
- Released: 2020-01-26
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/id1496478545/reviews.md

## What is 音耳せん?

Sound earplugs is an application that uses acoustic psychological effects (masking effects) instead of the noise canceller function to reduce ambient sounds that are of concern.

Effective when you can't concentrate on your work, study, programming, etc. due to "too quiet and uncomfortable" "I can't help but worry about ambient sounds" "I'm worried about a specific noise or the next conversation" there is.
However, whether or not the sound earplugs work well depends on the usage environment and individual differences. Please refrain from using if you are concerned about the playback sound of the app.

The specific sound to play can be selected from "radio noise", "forest rain sound", "cafe sound", "night sea", "early morning", "library", "moonlight", and "wind chime".
The playback time of the timer can be specified from "3 minutes, 5 minutes, 10 minutes, 15 minutes, 30 minutes, 1 hour", and the time until the end of playback can be confirmed with the countdown timer on the screen. I will.
Use the volume buttons on the main unit to adjust the volume level.

This app works with the speaker of the main body, but the effect is more clear with stereo earphones and stereo headphones.
Also, pay attention to the volume level so that you do not damage your ears with loud noise.


## Version history (last 5 releases)

### 2.3.0 — 2023-05-02

Updated Admob SDK.

### 2.2.0 — 2022-12-24

Fixed so that it can go to sleep after running the count timer.
Fixed the sound file.

### 2.0.0 — 2022-12-13

Updated info.plist file.

### 1.9.0 — 2022-08-14

Fixed the problem of screen display (zoom mode) on iPhoneX to iPhone13.

### 1.8.0 — 2021-02-23

Supported the App Tracking Transparency.
Updated the google Admob library.

## Apps similar to 音耳せん

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [HearMe by Oido](https://appshunter.io/ios/app/hearme-by-oido/id6748638902) | 5.0 (2) | Free | Utilities |
| [Meditation: Vibrate Phone](https://appshunter.io/ios/app/meditation-vibrate-phone/id6744251532) | — | Free | Utilities |
| [PA Verify for Watch](https://appshunter.io/ios/app/pa-verify-for-watch/id1564294270) | — | Free | Utilities |
| [Cat Clock app.digital cute](https://appshunter.io/ios/app/cat-clock-appdigital-cute/id1663648005) | — | Free | Utilities |
| [撮るだけ文字認識 & 画像検索 - PASHARU](https://appshunter.io/ios/app/and-pasharu/id6504626787) | — | Free | Utilities |
| [hourglass alarm timer](https://appshunter.io/ios/app/hourglass-alarm-timer/id6670145634) | 5.0 (4) | Free | Utilities |

## More apps by koji kamogawa

- [UkeDrum](https://appshunter.io/ios/app/ukedrum/id1488210714)
- [RST 599](https://appshunter.io/ios/app/rst-599/id1488919851)
- [WabunMorse](https://appshunter.io/ios/app/wabunmorse/id1490745806)
- [RST 599 Pro](https://appshunter.io/ios/app/rst-599-pro/id1497452984)
- [RST 599x](https://appshunter.io/ios/app/rst-599x/id1498597799)

All apps by koji kamogawa: https://appshunter.io/developer/1488210713

## Related topics

[koji kamogawa](https://appshunter.io/ios/topics/koji-kamogawa)

---

*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 2026-08-22.*