サクヤと4分筋トレ

Exercise doesn't have to be a habit. Just one session today is enough.

"Sakuya's 4-Minute Workout" is a workout app where Sakuya, a ninja girl, cheers you on with her voice and example videos. Each session is about 4 minutes long. No preparation or change of clothes is needed; you can start right wherever you put your smartphone. Plus, it's free and requires no registration.

■ Sakuya is by your side
- All exercises include example videos by Sakuya. You can learn the correct form just by imitating her.
- "10 more seconds!" "Thank you for coming again today!"—Sakuya will encourage you at the right time.
- Whether you work hard or rest, Sakuya won't blame you. When you return, she'll welcome you back with "Welcome back."

■ It's only about 4 minutes per session, so you can start
- 8 different menus, from gentle HIIT to serious workouts, tailored to your goals. All are about 4 minutes long.
- You can also create your own custom menus by freely combining exercises.
- 19 example exercises. This app uses a simple interval format: 20 seconds of exercise followed by 10 seconds of rest.

■ Safe and Easy to Use
・Free to use. Currently, there are no ads or in-app purchases.
・No account registration required. Download and start immediately.
・Records are initially saved on your device (see privacy policy for details).

■ The More You Continue, the Stronger You Become a Ninja
・Completing a workout earns you training points, increasing your ninja rank.
・Your efforts are visible through consecutive days and gold coins (in-app points).
・Setting a reminder will give you a gentle encouragement from Sakuya (notifications can be turned off).

■ Connect with Friends Casually
・Choose a "Ninja Name" and participate in the weekly rankings (real name not required; participation is optional).
・Exchange friend codes to see each other's progress this week.
・Send encouraging shurikens to friends who haven't started yet (pre-set messages only; casual).

*This app is intended to assist with fitness and does not provide medical advice. If you have any health concerns, please consult a doctor before starting exercise.

*This app is a fan-made (derivative) app of CryptoNinja. It is not an official or authorized app. The character "Sakuya" is a derivative character of CryptoNinja.