Comparison

Shuffle Sleep vs 認知シャッフル睡眠

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

Head to head
About

Shuffle Sleep

This app uses a cognitive method to help you fall asleep faster by presenting a sequence of unrelated images. It features human narrations, customizable rhythms, and a sleep timer to aid your transition into rest.

Highlights
  • Cognitive shuffle method
  • Human narrations
  • Bi-lingual support (English/Japanese)
  • Customizable rhythms
  • Sleep timer
  • Word management
Features
Read full description

Based on the "Cognitive Shuffle" method developed by Dr. Luc Beaudoin, a cognitive scientist at Simon Fraser University, this app is designed to help you drift off by scrambling your logical thoughts. When your brain is busy solving problems or worrying, it stays awake. By visualizing a sequence of unrelated images—like "Sunfish," "Crocodile," or "Sweater"—you trigger the brain's natural transition into sleep mode. [Features] Human Narrations: Natural, soothing voices recorded by professional voice actors, not robotic text-to-speech. Bi-lingual Support: Features both Japanese and English narrators. Customizable Rhythms: Adjust repeat counts and silent intervals to match your personal sleep pace. Sleep Timer: Automatically stops playback so you can sleep soundly. Word Management: Toggle specific words on or off to create your perfect shuffle list.

About

認知シャッフル睡眠

This app guides you to sleep using a cognitive shuffle method. It reads out random words, allowing you to focus your imagination and drift off to sleep. Customize voice, duration, and playback settings for a personalized experience.

Highlights
  • Randomized word recitation
  • Customizable voice (male/female)
  • Adjustable playback duration (1-30 mins)
  • Adjustable word recitation interval
  • Adjustable recitation speed
  • Adjustable volume control
  • Notification sounds are OFF
Features
Read full description

このアプリはあなたの睡眠導入をサポートします。 認知シャッフル睡眠法に必要な単語は、このアプリが全て読み上げてくれるので、あなたはただベッドに入り、アプリを起動し、単語の想像を広げる、ただそれだけです。 使い方: 1. 初期画面からすぐに開始することができます。 初期設定 - 声の種類: 男性 - 再生時間: 30分 2. 設定 声の種類と再生時間はお好みに変更できます。 声の種類: 男性・女性 再生時間: 1分〜30分 特徴: 1. 単語を読み上げる順番は完全にランダム 動画やその他のアプリでは、単語を読み上げる順番が固定されていたり、単語数が少なかったりなどが原因で慣れてしまうことがありますが、本アプリはそれらの問題を解決しています。 2. 声は男性、女性の2種類 (今後拡充予定) 声の種類はお好みに合わせて変更できます。 種類については今後、拡充予定です。 3. 読み上げ時間は1分~最大30分間 (今後拡充予定) 単語を読み上げている時間もお好みに合わせて変更していただけます。 4. 読み上げ間隔は8秒~最大13秒 (今後拡充予定) 単語を読み上げる間隔もお好みに合わせて変更していただけます。 5. 読み上げ速度は0.9倍~最大1.1倍速 (今後拡充予定) 単語の読み上げ速度もお好みに合わせて変更していただけます。 6. 読み上げ音量は端末の音量設定の1%~最大100% 単語の読み上げ音量もお好みに合わせて変更していただけます。 100%は端末で設定されている音量をそのまま出力しますので、元々の端末の音量が0の場合はアプリからは音は出ません。 7. アプリからの通知音はOFF アプリからは音声データの更新通知、アプリの更新通知がありますが、送信する際に通知音を制御してOFFにしているため、睡眠を妨げる心配もありません。 8. 問い合わせ アプリ内に公式LINEアカウントを設置しています。 アプリの使用方法でお困りのことや、改善要望などあればこちらからお問い合わせください。 さあ、リラックスして、心地よい眠りへと向かいましょう。

Screenshots

Shuffle Sleep3 screens
認知シャッフル睡眠4 screens

Verdict

The call

The clearest difference is ads: 認知シャッフル睡眠 at none against Shuffle Sleep's shown. 認知シャッフル睡眠 also leads on update cadence (every 2 weeks vs every 5 weeks) and iOS requirement (12.0 vs 15.6). Shuffle Sleep's advantage is ratings volume (4 vs 1). On price, rating, in-app purchases and monetization model 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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.0 for Shuffle Sleep against 3.0 for 認知シャッフル睡眠. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

Shuffle Sleep ships an update every 5 weeks, 認知シャッフル睡眠 every 2 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard4 real differences · 5 level
Shuffle Sleep versus 認知シャッフル睡眠: the parameters behind the verdict, then further details
ParameterShuffle Sleep認知シャッフル睡眠
PriceFreeFree
Rating3.0 (4 ratings)3.0 (1 ratings)
Number of ratings4 — better1
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size4 MB49 MB
Age rating4+4+
DeveloperSollappsMasao Sasaki

Customer experience

Shuffle Sleep

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

認知シャッフル睡眠

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

Shuffle Sleep

No in-app purchases

None

認知シャッフル睡眠

No in-app purchases

Questions

Is Shuffle Sleep free?
Shuffle Sleep is free to download, with no in-app purchases.
Is 認知シャッフル睡眠 free?
認知シャッフル睡眠 is free to download, with no in-app purchases.
Which has better reviews, Shuffle Sleep or 認知シャッフル睡眠?
Shuffle Sleep and 認知シャッフル睡眠 are both rated 3.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do Shuffle Sleep or 認知シャッフル睡眠 have ads?
Shuffle Sleep shows ads; 認知シャッフル睡眠 does not.
Which is updated more often, Shuffle Sleep or 認知シャッフル睡眠?
Shuffle Sleep ships an update every 5 weeks, and 認知シャッフル睡眠 every 2 weeks. Most recently, Shuffle Sleep was updated on November 3, 2026 and 認知シャッフル睡眠 on November 4, 2026.

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