Daybook.
A private journal

A day worth keeping.

Write a little. Keep the details. Return years later. Daybook is a private journal for one person, built for Renkara’s own use. It is not a product, is not for sale, and takes no sign-ups.

Read the privacy storyLook inside the journal
Illustration: a closed unmarked cloth journal and a pencil on a walnut desk beside an empty window, with a small steel-blue lamp.

Internal to Renkara. Daybook is a tool Renkara Media Group builds and runs for itself. It is not for sale, and there is nothing to buy or join.

Features

A place for the ordinary days.

The archive lives on the device. Writing and searching do not wait for a sync server. These screens use an invented StrataForge Robotics journal, never a real person’s entries.

Write, then return

A page for today

Today puts the daily prompt, today’s entries, a writing streak, and earlier memories together.

Today gathers a daily prompt, the current journal entry, the moon phase, and memories from earlier years.Today gathers a daily prompt, the current journal entry, the moon phase, and memories from earlier years.
A quiet start, and a reason to write. Enlarge to see the full screen.

Source and preview

Markdown is the entry’s source. Formatting buttons and a preview sit beside the writing field; the editor saves locally after a pause.

The editor shows Markdown source beside its rendered preview, with title, date, journal, tags, and place fields.The editor shows Markdown source beside its rendered preview, with title, date, journal, tags, and place fields.
Write in Markdown; read the preview beside it. Enlarge to see the full screen.

The same date, years apart

On This Day brings together entries from this date in earlier years. The date logic uses each entry’s recorded time zone.

On This Day shows journal entries from December 1 in three earlier years, with each year marked.On This Day shows journal entries from December 1 in three earlier years, with each year marked.
The same date, seen across the years. Enlarge to see the full screen.

Find the day again

Timeline and separate journals

Keep daily pages and a sketchbook in separate journals. Browse the archive in date order, or narrow the Timeline to one journal.

Timeline shows dated journal entries, a journal filter, and a search field over an invented archive.Timeline shows dated journal entries, a journal filter, and a search field over an invented archive.
An archive in date order. Enlarge to see the full screen.

A calendar with a memory

Each day shows its entry count. Select a date to read the entries that belong to it.

Calendar shows December 2036 with entry counts on its days and the selected day’s entry underneath.Calendar shows December 2036 with entry counts on its days and the selected day’s entry underneath.
Find an entry by the day it belongs to. Enlarge to see the full screen.

Search on the device

Search titles, bodies, tags, and place names locally. Combine a phrase with journal, tag, date, favorite, place, and media filters.

Search finds reservoir entries in the invented journal and offers journal, tag, date, favorite, place, and media filters.Search finds reservoir entries in the invented journal and offers journal, tag, date, favorite, place, and media filters.
A word you remember can bring a day back. Enlarge to see the full screen.

Private by purpose

Journal content is encrypted before upload

Optional sync encrypts each entry on the device before sending it. The server stores the encrypted payload, not the title, body, tags, place, or weather.

No telemetry
Daybook includes no analytics or crash-reporting client. Its own server access logger records the request method, path, and response status.
A journal has a way out
Bring an existing journal in from its JSON export. Export an open-format JSON archive or Markdown; the app warns that exports are plaintext.
Journals shows Daily pages and Sketchbook, with their descriptions and entry counts.Journals shows Daily pages and Sketchbook, with their descriptions and entry counts.
Separate journals, one personal archive. Enlarge to see the full screen.
How it works

From a moment to a memory

  1. Write

    Begin with a blank entry, a daily prompt, or a template.

  2. Keep

    The editor saves the entry on this device, with its date, journal, tags, and place.

  3. Return

    Browse Timeline, select a calendar date, or find the same date in a past year.

Accessibility

Built so everyone can use Daybook.

Daybook’s web app has native controls, labeled editor fields, and a layout that changes to one column on a narrow screen. The product evidence below is limited to source inspection and a scripted seven-view scan; no WCAG conformance level is claimed.

  • Partly supported

    Keyboard operation

    The web app uses native links, buttons, and labeled fields. A scripted Tab check reaches a control on Timeline. A complete keyboard audit has not been performed.

  • Not yet tested

    Screen reader landmarks and labels

    The web app has not been tested with a screen reader. Automated checks do not establish how the journal reads aloud.

  • Supported

    Contrast in light and dark

    The automated color-contrast rule found no violations on the seven scanned views at 375 and 1440 pixels, in light and dark. This is not a complete manual audit.

  • Not yet tested

    Reduced motion

    The capture uses the reduced-motion preference. A preference-by-preference motion audit has not been performed.

  • Not yet tested

    Text resize and zoom

    Text at 200 percent has not been tested in the product.

  • Partly supported

    Mobile and touch

    The web layout changes to a single column below 760 pixels. The recorded scan checks seven views for sideways page scrolling at 375 pixels.

Read the accessibility statement and evidence
Tech specs

Under the hood

Daybook technical specification
Writing
  • Markdown source and a rendered preview; multiple journals, tags, favorites, and editable entry dates
  • Daily prompts and reusable templates; local autosave
Privacy
  • Local browser storage and on-device search
  • WebCrypto AES-GCM encryption with a key derived on the device before journal-content upload
  • No MCP surface; no analytics or crash-reporting client
Archive
  • Timeline, Calendar, Today, On This Day, and journal views
  • Import an existing journal from its JSON export; own-format JSON and Markdown exports
Clients
  • A React web app and a SwiftUI iOS client over DaybookKit
  • Built for one person, for Renkara’s own use; not a product, not for sale, and no sign-ups
Native clients

On iPhone, iPad, and Mac

  • Daybook for iOSiPhone and iPad

    The SwiftUI source includes Today, Timeline, Calendar, On This Day, journals, search, and an editor, backed by a local store in DaybookKit. Native images and device-test claims are not part of this showcase.

FAQ

Questions people ask

Can I sign up for Daybook?

No. Daybook is a private journal for one person, built for Renkara’s own use. It is not a product and is not for sale.

Are these real journal entries?

No. Every product screen shows an invented StrataForge Robotics journal. Entries and weather are synthetic; the landscape images are original drawings.

Does encryption protect the local browser copy too?

The web app stores its working journal in browser local storage. The encryption described here protects journal-content uploads. Plaintext exports and the local working copy need the care appropriate to a private journal.

Is Daybook running in production?

No. This showcase describes the code and its local preview; Daybook is not deployed.

Contact

Questions about this tool?

Write to Renkara Media Group and a person will answer.

Email fleet@renkara.com