Comparison

音耳せん vs RetroDOS Player

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

音耳せん

Features
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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.

About

RetroDOS Player

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RetroDOS Playerは、日本の16ビットパソコン向けDOSソフトウェアに対応する互換プレイヤーです。 BIOSやROMファイルを追加せずに使える独自の互換実装を搭載しています。 すべてのソフトウェアの動作を保証するものではありません。 ・レトロなモニター表示と日本語ソフトキーボード ・複数キーの同時押し、VF1〜VF5、テンキー、外付けキーボード入力 ・16色/256色表示、OPN/OPNA音源の切り替え ・縦画面、横画面、ダブルタップによる全画面表示 ・ドラッグによるマウス移動、一本指の左クリック、二本指の右クリック ・保存と読込に対応した8つのステートスロット ゲームデータは同梱していません。利用する権利のあるソフトウェアをご自身でご用意ください。 「開く」から、この端末内やファイルアプリで接続したNASのゲームフォルダを選択します。 Mac/NAS上の元データは書き換えず、端末には実行用キャッシュを作成し、保存データを別に保持します。 ゲームデータなしでも「場所」からオリジナルDOSデモを起動し、画面表示やキーボード入力を試せます。 本アプリは独立した開発者による互換プレイヤーです。

Screenshots

音耳せん4 screens
RetroDOS Player1 screens

Verdict

The call

The clearest difference is ads: RetroDOS Player at none against 音耳せん's shown. RetroDOS Player also leads on update cadence (daily vs every 5 weeks). 音耳せん's advantage is iOS requirement (13.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

音耳せん ships an update every 5 weeks, RetroDOS Player daily. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

Scorecard3 real differences · 3 level
音耳せん versus RetroDOS Player: the parameters behind the verdict, then further details
Parameter音耳せんRetroDOS Player
PriceFreeFree
Update frequencyEvery 5 weeksDaily — better
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size29 MB100 MB
Age rating4+4+
Developerkoji kamogawaMasato Koshikawa

In-app purchases

None

音耳せん

No in-app purchases

None

RetroDOS Player

No in-app purchases

Questions

Is 音耳せん free?
音耳せん is free to download, with no in-app purchases.
Is RetroDOS Player free?
RetroDOS Player is free to download, with no in-app purchases.
Do 音耳せん or RetroDOS Player have ads?
音耳せん shows ads; RetroDOS Player does not.
Which is updated more often, 音耳せん or RetroDOS Player?
音耳せん ships an update every 5 weeks, and RetroDOS Player daily. Most recently, 音耳せん was updated on November 11, 2026 and RetroDOS Player on November 9, 2026.

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