Kanbyo Baton Privacy Policy
Effective: November 15, 2026
Kanbyo Baton (看病バトン) is an iPhone app by Enso Labs LLC ("we"). This page explains what information the app handles, where it is stored and how it is used. The Japanese version is the primary version.
- We collect no data from you. There is no account and no Kanbyo Baton server.
- Your records are stored only on your iPhone and in your own iCloud. They are shared only with family members you invite through iCloud.
- No ads, no tracking, no usage analytics, no crash-reporting tools and no third-party SDKs.
Where your data is stored
What you enter (names of family members, children and helpers, temperatures, medicines and symptoms, care-board assignments, leave records, sick-child daycare facilities, nursery rules and so on) is stored on your iPhone, including an area that only the app and its own widget can read.
When you are signed in to iCloud, the data is also stored in your iCloud private database through Apple's iCloud (CloudKit) and synced with your other devices and your family. Health-related records are stored as CloudKit encrypted fields. This data lives in your iCloud account on Apple's servers; we cannot see it. Apple's privacy policy applies to how iCloud handles it.
When you are not signed in to iCloud, the data stays on that iPhone only.
Sharing with your family
When you use "Invite family with iCloud" and enter the other person's Apple ID (email address or phone number), an invitation link is created with Apple's iCloud sharing. The email address or phone number goes only to Apple's iCloud to identify the person; it never reaches us. You send the link yourself, through LINE, Messages or any method you choose.
Family members who accept can view and edit that family's records. Shared family data is stored in the iCloud of the person who created the family.
Calendar (optional)
Only if you use the Plus planning assistant, the app asks for calendar access. Events are read on your iPhone and only "free / busy" time blocks are shared with your family, never event titles or details. Adding a leave day to your calendar uses write-only access.
Camera and Photos
The camera is used only in seizure mode, to record a video to show the doctor. The microphone is not used, so no audio is recorded. Videos and visit-summary images are added to Photos when you choose to save them; the app never reads your photo library. Visit summaries and fever-chart PDFs you share go only to the recipient you pick in the share sheet.
Notifications
Alerts such as the sick-child daycare booking alarm are scheduled on your iPhone. Notices that a family member changed the care board are delivered by Apple through iCloud (CloudKit) change notifications. We send no notifications ourselves and no promotional notifications.
Purchases (Kanbyo Baton Plus)
Purchases of Kanbyo Baton Plus are processed by Apple through the App Store. We never receive your payment details, name or email address. The purchase is verified on your iPhone. So that the whole family can use Plus, only the fact that Plus is active is recorded in the family's shared data.
Phone calls (119 and #8000)
The 119 (emergency) and #8000 (pediatric advice line) buttons only open the iPhone's call screen. The app never places a call automatically, and no call information reaches us.
Ads, analytics and tracking
Kanbyo Baton shows no ads and uses no usage-analytics or crash-reporting tools. It does not track you across other apps or websites. If you turned on "Share With App Developers" in iOS, Apple may aggregate diagnostic information such as crashes and provide it to developers. That is an Apple feature you can change at any time in Settings → Privacy & Security → Analytics & Improvements.
Not medical advice
Kanbyo Baton is not a medical device. It does not diagnose, treat or give dosing advice. If you are worried about your child's health, consult a doctor or #8000. In an emergency, call 119.
Deleting your data
- Data on your iPhone: deleting the app deletes the data stored on that iPhone.
- Data in iCloud: on your iPhone go to Settings → [your name] → iCloud → Manage Storage (Manage Account Storage) → 看病バトン and delete the data.
- If you joined a family by invitation: in the app, Settings → 家族 (Family) → 「この家族から抜ける」 (Leave this family) removes the family's data from that iPhone.
- If you created the family: in the app, Settings → 家族 (Family) → 「メンバーを管理」 (Manage members) lets you remove participants or stop sharing.
Because we do not hold any of your data, there is nothing for us to delete on our side.
Children's information
Kanbyo Baton is an app for parents. Children's names and health records are entered by parents and, as described above, stay only on the iPhone and in the family's iCloud.
If you email us
If you contact us by email, we use your email address and message only to reply and to help you.
Changes to this policy
If we change this policy, we will update this page and its effective date. If the way the app handles data changes significantly, we will also say so in the app's update notes.
Contact
Enso Labs LLC · euleraibot@gmail.com