Privacy policy

Yakusugi doesn't have accounts, ads, analytics or tracking. Everything you create in the app stays on your iPhone or iPad.

What's stored on your device

• Notes you save from drills and the scratchpad
• Your progress: recent activity, missed questions, streak and bookmarks
• Profile details you choose to enter (name, email, study goal, target date)
• Settings such as haptics and reminder time

None of this is sent to us or to anyone else.

Notifications

If you turn on daily reminders, the app schedules them on your device. You can turn them off in App Settings or in iOS Settings at any time.

Deleting your data

Clear your notes in App Settings, reset your profile in Account Settings, or delete the app to remove everything it stored.

If you email us

When you contact [email protected], we use your email address and message only to reply to you. We don't add you to a mailing list or share your message.

This website

yakusugi.app doesn't use cookies, analytics or advertising. Our hosting provider, Cloudflare, processes basic technical information such as IP addresses to deliver and protect the site.

Children

Yakusugi is meant for students and professionals and isn't directed at children under 13.

Changes and contact

If this policy changes, for example when new features need it, we'll update it here and in the app before the change takes effect.

Questions? Email [email protected].

Effective October 15, 2026