天使と悪魔のファスティング

Content rating
Everyone
1+
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Content rating
Everyone
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About this app

Fast at your own pace on a quiet island.

"Angel and Devil Fasting" is a fasting support app that makes starting, measuring, understanding your body's changes, and continuing your fast much simpler.

Should you stop the timer, or push on a little longer? If you're unsure, ask the angel and devil on your shoulders.

■ For you if:
・You want to try 16:8 or 14:10 fasting
・You want to know "what's happening to your body right now"
・You're tired of monthly subscriptions and annoying notifications
・You want to continue fasting in a fun way without being too strict

■ Main Features

⏱ Simple Timer
Complete in just two taps: start and goal. See elapsed time and progress towards your goal at a glance.

You can even adjust the start time afterward, so "actually starting two hours ago" is OK.

🪽😈 Angel and Devil Companions
Gentle voices of an angel and a devil interact on the left and right sides of the home screen.

Sometimes, character breakdowns (angelic transformation, devilish tsundere) provide moments that will make you chuckle.

🌿 6 Stages of Bodily Change
Digestion Phase → Stabilization Phase → Transition Phase → Ketosis Entry Phase → Repair Phase → Deep Repair.
Explain what's happening over time with simple words and icons.

📊 History Saved Indefinitely
Solves the biggest complaint about other apps: "Short history."
You can view your most recent 10 entries, as well as cumulative, longest, and average history in a list.

📱 3 Plans
12:12 / 14:10 / 16:8. Choose the plan that suits you.

🎉 Celebrate Goal Achievement
Celebrate your hard work with confetti and special lines.

■ Our Promise
- No subscriptions. All features are free.
- Only one quiet ad. Never on the timer screen.
- Ad removal is a one-time purchase. You won't have any trouble canceling your subscription.

* All health data is local to your device. It is not sent to the server.

* Multilingual support (v1.0 is Japanese and English, more languages ​​to be added as needed)

■ Safety Precautions
This app is not medical advice.
Please stop using the app if you are feeling unwell.
Not recommended for pregnant women or those with a history of eating disorders.
If you have a chronic illness or are taking medication, please consult your doctor beforehand.

Developed by a team of 4 people, aiming to create a simple, long-lasting app.
Updated on
Jul 11, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location and Device or other IDs
This app may collect these data types
Location, App info and performance, and Device or other IDs
Data is encrypted in transit
Data can’t be deleted

What’s new


Version 1.2.4

・You can now set your own name in Settings (optional)
・Minor display improvements
・Stability improvements
Content rating
Everyone
In-App Purchases
Learn more

App support

About the developer
高橋亮司
rtinformationsystem@gmail.com
兵庫区大開通8丁目2−2 1305 神戸市, 兵庫県 652-0803 Japan

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