Debt Clock vs Yomibi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Debt Clock
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Debt Clockは、ただ時間を計るだけのタイマーではありません。あなたが設定した「理想のペース」と「現実の行動」の差分を計算し、サボった時間を「負債(Debt)」として可視化します。 負債を抱えたまま一日を終えるか、それとも完済してスッキリ眠るか。 あなたの自己規律が試される、全く新しい習慣管理ツールです。 【主な機能】 ・Time Debt System(時間負債システム) 目標時間に対して作業が遅れると、その差分が「負債」として積み重なります。負債を返済(リカバリー)するために、あなたはより集中する必要が出てきます。ゲーム感覚で自分を律しましょう。 ・Neo-Brutalism Design 流行の「ネオ・ブルータリズム」を取り入れた、高コントラストで力強いデザイン。余計な装飾を削ぎ落とし、あなたの集中力を極限まで高めます。 ・Fluid Wave Animation 時間の経過を「波」のアニメーションで表現。数字だけでなく、直感的に残り時間を感じることができます。ホーム画面ウィジェットにも対応。 ・Streak & Graph 継続日数(ストリーク)と日々のパフォーマンスをグラフ化。あなたの頑張りを視覚的に記録し、モチベーションを維持します。 ・Focus on Privacy 会員登録不要。すべてのデータはあなたの端末内に保存されます 利用規約 https://button-hardboard-dd1.notion.site/Debt-Clock-2026-2-4-2fdc16d080408079b377c256090ac220?source=copy_link プライバシーポリシー https://button-hardboard-dd1.notion.site/Debt-Clock-2026-2-4-2fdc16d080408079b377c256090ac220?source=copy_link
Yomibi
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Yomibi is a speed-reading app that multiplies your reading speed with the RSVP (Rapid Serial Visual Presentation) technique. Words appear on screen one at a time; the red focus letter always stays in the same spot. Because your eyes never jump along the line, nothing breaks your focus. Free to download, with a full-featured 7-day trial. After that, a single one-time purchase unlocks the app forever — no subscription, ever. FEATURES • Import PDF, Word (.docx), EPUB, web pages, and clipboard text • Adjustable speed from 100 to 1,000 words per minute • Natural rhythm with end-of-sentence and comma pauses • Automatically pick up where you left off — progress is never lost • Library: folders, search, multi-select, reading time estimates • Personal reading view: colors, font, and text size • Optional haptic feedback at sentence ends • The screen stays awake while you read; the interface fades away, leaving only the word FULLY OFFLINE No accounts, no ads, no tracking. Your texts stay on your device alone.
Screenshots
Verdict
The clearest difference is ads: Yomibi at none against Debt Clock's shown. Debt Clock's advantage is update cadence (every 2 days vs every 5 days) and iOS requirement (13.0 vs 15.0). 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
Both are free to download. Debt Clock sells 2 in-app purchases, starting at $1.99 per month and Yomibi sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Debt Clock ships an update every 2 days, Yomibi every 5 days. The most recent releases landed on October 18, 2026 and October 3, 2026 respectively.
| Parameter | Debt Clock | Yomibi |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 5 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 25 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Kanta Osumi | MURAT KARABUL |
In-app purchases
Debt Clock
- プレミアムプラン(月額)$1.991 Month
- プレミアムプラン(年額)7 Days trial$14.991 Year
Yomibi
- Sakkad Full Version$3.99









