Privacy is the architecture.

Jikoku does not require a Jikoku account to open the application and use its core workspace. There is no Jikoku login that becomes the owner of your calendar, reminders, notes, contacts or meeting transcripts.

The application is not designed around an advertising profile. It does not need to study your behavior in order to sell attention, place ads or build an audience segment from your plans.

Jikoku also does not operate a content server that stores your personal notes, meetings, contacts and tasks as a second cloud copy. The Mac application works with Apple's system data and local application files instead.

On-device speech recognition and meeting transcription use WhisperKit. Local AI features use Gemma 4 12B running through Apple MLX. Both model resources are bundled inside Jikoku, with no separate download after installation or on first launch. Audio and text can be transcribed, summarized and reviewed for possible tasks without being sent to a Jikoku AI endpoint, a cloud AI provider or Apple Intelligence.

The bundled model resources account for roughly 8 GB of Jikoku's distribution footprint. Application state and local support files live in the Mac's Application Support area. The operating system controls access to protected data such as Calendar, Reminders, Contacts and the microphone.

Permissions are explicit. macOS asks before Jikoku can read calendars, reminders, contacts, notes through automation, or audio from the microphone. A denied permission limits the related function rather than creating a hidden route around the system.

Privacy language should describe the real system, not a perfect imaginary one. If you obtain Jikoku through an app marketplace, that marketplace can know about the download or purchase. Early access distribution may also leave the ordinary records created by the channel used to send the build.

When Apple Calendar, Reminders, Notes or Contacts synchronize through iCloud, Apple participates in that synchronization. The data path therefore includes the Apple services you have chosen to use.

If you connect a work Exchange calendar, CalDAV account or another system calendar provider, that provider receives the information required for its own service. Jikoku cannot make a work account private from the organization operating that account.

These facts do not weaken the local architecture. They define its boundary. Jikoku's promise is that it does not add a Jikoku content cloud or a remote Jikoku AI processor to those existing relationships.

Calendar and Reminders access is provided through EventKit. Notes access uses Apple Events automation. Contacts access is requested for the people workspace. Microphone access is used for recording, and Screen Recording permission is requested only when capturing system audio from an online meeting. Every permission can be reviewed or revoked in macOS System Settings.

Credentials for an invited work service are kept in the Mac Keychain. When Jikoku connects to an Apple iCloud CalDAV calendar or a configured Microsoft Exchange account, the application connects directly to that provider. A Jikoku server does not sit between the Mac and the configured service.

This site does not have access to the calendars, reminders, notes, contacts or transcripts inside the Mac application. Product data is not exposed to a marketing page simply because the product and site share a name.

The site does not use an analytics script, advertising cookies or user-action tracking. It does not create a profile of pages viewed, buttons pressed or product interests. The waitlist form is the only part of the current site that intentionally sends user-provided personal data to an external service.

On a first visit, the site checks the browser's language preferences. If none matches a supported language, it can use a coarse country code supplied by the hosting infrastructure to choose the initial language. The jikoku-locale cookie stores only the selected language for one year. The site does not request precise browser location, store the country in that cookie or use either signal for analytics or advertising.

If you submit the waitlist form, Jikoku uses your email address for the launch email and, when the form is presented as an early-access request, a possible individual invitation. Joining the wishlist does not guarantee access or start a trial. The signup can also include the site language, signup date, source page and coarse technical context supplied by the delivery infrastructure, such as country, city and device platform. It does not include data from the Jikoku application.

The signup is stored in a private Cloudflare D1 database and added to a Resend Audience for email delivery. Resend processes the address as the storage and delivery provider. Jikoku plans one launch email, not a recurring newsletter, and does not sell the address or share it for advertising.

You can request deletion from the waitlist at any time by emailing [email protected]. The request will be used to remove the address from the waitlist database and Resend Audience.

Jikoku is a general-purpose productivity product and is not directed to children under 13. The privacy description may change when distribution, permissions or integrations change. Material changes should be reflected here before the corresponding service is used.

Questions about privacy, a particular build or the handling of a waitlist address can be sent to [email protected].

No privacy page can turn a changing product into a permanent promise by itself. Distribution, entitlements and system integrations can change as Jikoku moves toward a signed public release. Claims on this page should be reviewed whenever the architecture changes.

The useful rule is simple: the product should show when data leaves the device, name the service receiving it and avoid describing a future capability as if it were already available.

If a statement here conflicts with the behavior of a particular early build, the behavior should be investigated and the statement corrected. Marketing language is not a substitute for technical truth.

Questions about a build can be raised through the early access page before installation.