夜更かし防止・睡眠改善｜シンデレラタイム

Cinderella Time: A Sleep Improvement App to Prevent Late Nights

For those who can't stop using their smartphones before bed. This sleep habit improvement app supports preventing late nights with bedtime reminders.

"Just a little bit of social media," "Just one video"—that "just a little bit" can turn into 2 AM. The next day, you're sleep-deprived and groggy all day. Let's break this vicious cycle.

Cinderella Time gently notifies you 30 minutes before bedtime and presents cards to show you what behaviors to avoid. It supports the creation of high-quality sleep habits.

■ Recommended for those who:

・Still use their smartphones even after getting into bed

・Check social media before bed is a habit

・Can't stop watching videos once they start

・Want to stop staying up late but don't have a trigger

・Don't feel refreshed even after waking up in the morning

・Want to improve the quality of their sleep

・Feel addicted to their smartphone

・Want to aim for early bedtime and early rising

■ Main Features

【Bedtime Reminder Notification】

Receive a notification 30 minutes before your set bedtime. Reminders are given gradually 15 minutes before bedtime and again at bedtime. Even if you miss a reminder, you can rest assured.


[Things to Avoid Cards]
Three actions to avoid before bed are displayed as cards.

• Social Media - Checking Twitter, Instagram, and LINE stimulates the brain.
• Videos - YouTube and Netflix tend to be watched for extended periods, and blue light reduces sleep quality.
• News - Stimulating information causes anxiety and makes it difficult to fall asleep.

Each card also displays the reason why you should avoid it, allowing you to change your behavior with confidence.


[Avoidance Meter]
Visually displays your daily progress. Increasing consecutive days of achievement boosts motivation and supports habit formation.


[Customization Function]
You can freely add your own "Things to Avoid" cards, such as games, online shopping, and checking work emails.


[Daily Bedtime Settings]
You can set different bedtimes for weekdays and weekends. Adjust it to your own lifestyle.


[Dark Mode Design]
Designed for use before bedtime, it employs a dark mode that is gentle on the eyes. This design features a relaxing color scheme based on calming purple and deep blue.

■ Why you should avoid using your smartphone before bed

• Blue light suppresses the secretion of the sleep hormone (melatonin)

• Stimulating information from social media and news keeps the brain awake

• The "just a little longer" mentality delays bedtime

• It makes it difficult to fall asleep and prevents deep sleep

■ How to use (3 steps)

1. Simply launch the app and set your target bedtime

2. You will receive a notification 30 minutes before bedtime

3. Check the "things not to do" card and put your smartphone down

■ Features of this app

• Simple - Ready to use immediately by simply setting your bedtime

• Motivation maintenance - The avoidance meter visualizes your progress

• Gentle approach - Provides "awareness" rather than coercion

• Privacy-focused - All data is stored on your device

■ The benefits of good sleep

• You can wake up refreshed in the morning

• Improved concentration during the day

• Reduced stress

• Improved immunity

Improving the quality of your sleep improves the quality of your life.


Let's start with a challenge to avoid using your smartphone 30 minutes before bedtime for one week.

To wake up refreshed tomorrow morning.

Let's start Cinderella Time tonight.

* This app is a tool to support improving sleep habits. It is not a medical procedure.

* Please allow notifications to ensure you receive them.