Comparison

SoundMute vs Four Line Diary / 4行日記

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

Head to head
About

SoundMute

This app provides a variety of natural sounds to mask bathroom noises, helping users feel more comfortable. It offers 10 distinct sound options, including toilet flushes and weather effects, with a simple interface for quick playback.

Highlights
  • 10 natural masking sounds
  • Toilet flush sound
  • Water sounds
  • Weather sounds
  • Plays in silent mode
  • Remembers last selected sound
  • Prevents screen sleep
Features
Read full description

A sound masking app for those who feel self-conscious about bathroom noises. Play a masking sound with a single tap. Choose from 10 natural sounds including toilet flush, bubbling streams, waterfalls, ocean ripples, heavy rain, and thunderstorms. Sounds are organized by category for quick selection. ■ Features ・10 masking sounds (Toilet, Water, Weather) ・Plays even in silent mode ・Remembers your last selected sound ・Prevents screen sleep during playback ・Simple, intuitive interface ・No ads

About

Four Line Diary / 4行日記

Features
Read full description

あなたの日々の出来事を、とってもシンプルに簡単かつ効果的に記録できる4行日記アプリです。毎日の忙しさの中で、大切な瞬間や学びを見逃さないための完璧なツール。シンプルで直感的なデザインが、4行日記をつける習慣をサポートします。 主な特徴: ・カレンダービュー: 日付を選択して、その日の日記に簡単アクセス。 ・4行日記フォーマット: 事実、発見、教訓、宣言 - これらの4つの要素で、日々の体験を深く反映。 ・自動保存機能: 書いた内容は自動的に保存されるので、大切な思い出も安心。 ・シンプルで美しいデザイン: 直感的なインターフェースで、誰でも簡単に使用可能。 日々の小さな出来事から大切な教訓まで、何でも記録して、時間をかけて振り返ることができます。 今すぐダウンロードして、自分だけの日記を始めましょう!

Screenshots

SoundMute1 screens
Four Line Diary / 4行日記4 screens

Verdict

The call

The clearest difference is update cadence: Four Line Diary / 4行日記 at every 4 days against SoundMute's every 9 months. Four Line Diary / 4行日記 also leads on iOS requirement (11.0 vs 17.0). On price, ads, 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

SoundMute ships an update every 9 months, Four Line Diary / 4行日記 every 4 days. The most recent releases landed on October 31, 2026 and November 8, 2026 respectively.

Scorecard2 real differences · 8 level
SoundMute versus Four Line Diary / 4行日記: the parameters behind the verdict, then further details
ParameterSoundMuteFour Line Diary / 4行日記
PriceFreeFree
Rating1.7 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 9 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.011.0 — better
Further details — not scored
Size8 MB31 MB
Age rating4+4+
Developericotarai.me

In-app purchases

None

SoundMute

No in-app purchases

None

Four Line Diary / 4行日記

No in-app purchases

Questions

Is SoundMute free?
SoundMute is free to download, with no in-app purchases.
Is Four Line Diary / 4行日記 free?
Four Line Diary / 4行日記 is free to download, with no in-app purchases.
Do SoundMute or Four Line Diary / 4行日記 have ads?
Neither SoundMute nor Four Line Diary / 4行日記 shows ads.
Which is updated more often, SoundMute or Four Line Diary / 4行日記?
SoundMute ships an update every 9 months, and Four Line Diary / 4行日記 every 4 days. Most recently, SoundMute was updated on October 31, 2026 and Four Line Diary / 4行日記 on November 8, 2026.

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