Privacy Policy

The information the App stores and processes is limited to the following.

• User identifier: an anonymous ID issued by Supabase Auth. If you choose Sign in with Apple, the ID issued by Apple and, if you allow it, your email address.
• Record text: the text you create with the “etch” action (visible characters excluding URLs, up to 200 in Japanese / 400 in English; up to 1,000 raw characters including URLs).
• The record’s creation time (UTC).
• Embedding vector: a numeric representation of the record text produced by OpenAI text-embedding-3-small (used for similarity search and computing the color of emotion).
• Mood vector (mood_vector): a 2-dimensional value computed by comparing the above embedding against four internal anchor sentences.
• Device time zone information: to keep date display consistent.
• Crash and error logs: stack traces and device-type information via Sentry. Record text is not sent.
• Subscription status: the hash and expiry of the receipt issued by Apple. We do not store the receipt itself.

The App does not collect the following:

• Location
• Photos, contacts, calendar
• Microphone, camera
• Advertising IDs (IDFA / GAID)
• Third-party trackers or analytics

We use the information we collect only for the following purposes.

• Storing and displaying records
• The feature for asking questions of past records (natural-language search and AI response generation)
• Computing the color of emotion (color representation on the calendar)
• Managing usage limits (records per day, questions per month)
• Automatically generating the monthly review (a Pro feature)
• Fixing defects and improving the service
• Responding to user support

The App passes information to the external services below. In every case this is limited to what is necessary to provide the service; we never provide information for advertising or profiling purposes.

OpenAI and Anthropic do not use the data sent by the App to train their own models (in accordance with each company’s API terms).

• Record text is retained for as long as the account exists.
• By its nature, the App provides no in-app editing or deletion whatsoever (because “irreversibility” is at the core of its concept).
• If you delete your account, all records and related information are physically deleted. They cannot be recovered afterward.

You can do this from “Delete account” in the settings screen. After you do:

• All records, authentication information, subscription information, and crash logs are physically deleted within 30 days.
• The pre-deletion state cannot be restored.
• Even if you sign in again with the same Apple ID, your pre-deletion data is not restored (it is treated as a separate account).

You can do the following.

• Export all of your records as JSON / Markdown (a Pro feature, from the settings screen)
• Delete your account (from the settings screen)
• Contact us regarding this policy or the information we hold

The App is not intended for use by anyone under 13. If you are under 13, please do not use the App.

For questions or requests, please contact us below.

Email: kokujitsuki@five-birds.com

This policy may be revised without prior notice. We will announce significant changes via in-app notification. Continued use after a revision is deemed acceptance of the revised policy.