Comparison

Work Rhythm vs Yakusoku.

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

Head to head
About

Work Rhythm

Enhance your work and study sessions with calming background music. This app offers curated playlists, focus timers, and continuous playback to boost productivity and relaxation. Enjoy a user-friendly interface designed for seamless integration into your daily routine.

Highlights
  • Varied playlists for work, study, and relaxation
  • Focus and break timers
  • Save favorite tracks
  • Continuous playback with auto-switching
  • Background playback support
  • User-friendly interface
Features
Read full description

Work Rhythm is an app that delivers BGM designed to enhance focus and make work or study sessions more enjoyable. With natural rhythms and calming melodies, it helps soothe your mind while boosting your productivity. ■ Key Features ・Varied Playlists  Choose music tailored for work, study, or relaxation time. ・Timer Function  Set work durations to enter focus mode, and make use of break timers. ・Favorites Feature  Easily save your favorite tracks for quick playback. ・Continuous Playback & Auto-Switching  Enjoy smooth transitions between songs without interrupting your workflow. ・Background Playback  Listen to music even when the app is minimized. ■ Recommended For ・Those who want to stay focused during work or study. ・Anyone searching for soothing background music. ・People who aim to manage time effectively and work more efficiently. ・Those looking for calming music to unwind and relax. ■ App Highlights ・Includes a wide range of genres, such as Lofi and relaxing music. ・Features a beautiful design with a user-friendly interface. ・Offers simple controls, making it easy to incorporate into your daily routine. Make your time more productive and enjoyable with Work Rhythm!

About

Yakusoku.

Features
Read full description

一日に、自分に、一つだけ約束する。 これは、自分との約束を守る力を鍛えるためのアプリです。 ◆ たった一つのシンプルな習慣 朝、自分に一つだけ約束を書きます。 「今日、私は自分に約束する:___」 ただ一行。 夜、その約束と向き合います。 守れたのか。守れなかったのか。 ○か×を、自分で押します。 たったそれだけ。 ◆ 4つの記号が、あなたの日々を記録する ○ 守れた × 守れなかった △ 向き合わなかった(判定せず日付境界を越えた日) — 約束しなかった日 これらの記号が、履歴に静かに積み重なっていきます。 それは、あなたと自分の関係の、嘘のない記録です。 ◆ 取り消せない 一度確定した判定は、後から変更できません。 ゲームのようにリセットできない。 過去は、重い。 だからこそ、今日の一つの約束に、意味が宿ります。 ◆ 白と黒だけの、静かなデザイン 通知もカラフルなアニメーションもありません。 バッジも、連続記録のプレッシャーもありません。 ただ、あなたと、今日の約束と、向き合う時間だけ。 ◆ プライバシー完全保護 すべてのデータは、あなたのiPhone内にのみ保存されます。 外部に送信されることは一切ありません。 データ収集ゼロ、ネットワーク通信ゼロ、広告ゼロ。 ◆ こんな人に ・毎日の小さな積み重ねを大切にしたい人 ・自分との信頼を取り戻したい人 ・ミニマルで静かなアプリを好む人 ・シンプルな内省の時間が欲しい人 今日、あなたは自分に何を約束しますか。

Screenshots

Work Rhythm4 screens
Yakusoku.4 screens

Verdict

The call

The clearest difference is in-app purchases: Yakusoku. at none against Work Rhythm's 4. Yakusoku. also leads on ads (none vs shown). Work Rhythm's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence 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. Work Rhythm sells 4 in-app purchases, starting at $0.99 per month. Yakusoku. asks for nothing beyond the download.

UpkeepUpdate frequency

Work Rhythm ships an update every 9 days, Yakusoku. weekly. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

Scorecard3 real differences · 5 level
Work Rhythm versus Yakusoku.: the parameters behind the verdict, then further details
ParameterWork RhythmYakusoku.
PriceFreeFree
Positive reviews50.0% of reviews—
Update frequencyEvery 9 daysWeekly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size106 MB1 MB
Age rating4+4+
DeveloperRui HashimotoShosuke Sato

In-app purchases

4 purchases

Work Rhythm

Subscriptions1
  • Premium Member7 Days trial$0.991 Month
One-time3
  • コーヒー1杯応援$0.99
  • ランチ応援$0.99
  • 本気応援パック$5.99
None

Yakusoku.

No in-app purchases

Questions

Is Work Rhythm free?
Work Rhythm is free to download, with in-app purchases available.
Is Yakusoku. free?
Yakusoku. is free to download, with no in-app purchases.
Do Work Rhythm or Yakusoku. have ads?
Work Rhythm shows ads; Yakusoku. does not.
Which is updated more often, Work Rhythm or Yakusoku.?
Work Rhythm ships an update every 9 days, and Yakusoku. weekly. Most recently, Work Rhythm was updated on November 4, 2026 and Yakusoku. on November 9, 2026.

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