SuperBoox. View source
ANDROID 0.8.7 / IN DEVELOPMENT

A little more
headspace.

Your journal, your tasks, your day.
A thoughtful place to put pen to screen.

Made for BOOX and Android stylus devices. Write naturally, turn thoughts into ToDos, and keep your calendars close.

Take a closer look Set up SuperBoox
Local journal & tasks. No SuperBoox account.
Dated pages, native pen input, and room to think.Illustrated app preview · sample content
Native pen input On-device recognition Your device calendars Locally saved ink

A place for the everyday

From the first thought
to the next thing.

Three parts of your day, together on your tablet. Built around handwriting, with the details that keep you moving.

01 / THE DAILY JOURNAL

A fresh page.
Every single day.

Open straight into today. Follow your thoughts across fixed pages, then find your way back with a calendar that marks every day you’ve written.

  • Dots, lines, or graph paper — your way
  • Swipe pages, pinch to zoom, pan with two fingers
  • Copy yesterday’s pages into a new day
Undo & redo, with up to 50 operations per page

Try a paper style. Adjust spacing and thickness in the app.

MAKE YOUR MARK

Eight pens. Five favorites.
One familiar feeling.

Save your go-to style, color, and thickness in five presets. Color-capable devices get swatches and a custom RGB picker; monochrome BOOX gets grayscale.

NormalFountainHighlighterPencilBrushCalligraphyDashCross
THINK OUTSIDE THE LINES

Ideas can move.

Lasso your ink, then move, stretch, rotate, copy, or delete it. Turn a selected thought into a ToDo while keeping the original on the page.

02 / HANDWRITTEN TODOS

Write it down.
Take it from there.

Write a task, recognize it, review it, and save. Your running list stays with you across journal dates, in a drawer beside the page.

  • English & German on-device recognition
  • Priorities, due dates, and editable handwriting
  • Overdue tasks first, completed tasks tucked away
Sort by priority, due date, created date, or last edit
03 / YOUR DEVICE CALENDARS

See what’s next.
Stay in the moment.

Keep today and the next two days in an agenda beside your journal. Open the full calendar when you need a wider view.

DayNext Three DaysWeekMonth

Create and edit one-off events in writable calendars. Handwrite the title, location, and description, then review the recognized text before saving.

A simple arrangement

Your pages stay
in your hands.

JOURNAL & TODOS

Saved on your device.

Your written pages and confirmed tasks save locally, including the original ink. No SuperBoox account or cloud service to configure.

CALENDARS

Connected through your provider.

Your installed calendar software handles accounts, synchronization, and reminders. SuperBoox works with the calendars already on Android.

Notebook and ToDo sync, export, Nextcloud, and a web editor are deferred.

Bring your pen

Your first page
starts here.

SuperBoox is in active development. The current setup uses a locally built debug APK on a compatible device.

  1. 01

    Build & install.

    Use Android 10 or newer on a 64-bit ARM device. Build the debug APK with Java 21 and Android SDK 36, then install it with ADB.

    Android setup guide
  2. 02

    Make yourself at home.

    Open today’s journal, pick your paper, and save a favorite pen. For ToDos, download an English or German model once; recognition then works offline.

    About 20 MB per recognition language
  3. 03

    Bring in your calendar.

    Set up accounts with your calendar provider, then grant calendar access in SuperBoox. Add Webcal subscriptions through ICSx⁵ if you need them.

    Optional · journal & ToDos work independently
Build and install from the repository

From a local checkout, with Java 21, Android SDK 36, Build Tools 36.0.0, and ADB on your path. Set ANDROID_HOME or sdk.dir in your untracked local.properties; connect your device with USB debugging enabled.

./gradlew :android:app:lintDebug :android:app:testDebugUnitTest :android:assemble
adb install -r apps/android/app/build/outputs/apk/debug/app-debug.apk

This builds a locally signed debug APK, not a production release. The first physical target is BOOX Note Air 5 C on Android 15; writing latency still needs device validation.

A few useful details

Before you
turn the page.

Which devices can I use?

SuperBoox requires Android 10 or newer and a 64-bit ARM device. The first physical target is the BOOX Note Air 5 C on Android 15. BOOX uses the native firmware pen engine; other Android stylus devices use the generic GPaper engine. The journal is portrait-only. Physical-device writing latency still needs validation.

Does my handwriting leave the device?

Journal pages and confirmed ToDos, including their editable ink, are saved in the app’s private local storage. English and German task recognition runs on device after a one-time language-model download of about 20 MB per language. Network access is used for model downloads and ML Kit SDK operation. Handwriting is not sent to a cloud OCR service.

How do calendars and Webcal subscriptions work?

Connect accounts using installed calendar software, such as DAVx⁵, and grant SuperBoox calendar access. SuperBoox reads and writes Android’s Calendar Provider; your provider handles account synchronization and reminders. Webcal links are handed to ICSx⁵ for subscription setup, then appear as read-only device calendars after sync.

Can I edit recurring events or invitations?

Recurring events, recurrence exceptions, and meetings or invitations are view-only. You can create, edit, and delete one-off events in writable calendars, including all-day events, locations, descriptions, and provider-supported reminders. Handwritten event fields are recognized, reviewed, and saved as text.

Is there a cloud backup or web editor?

Notebook and ToDo sync, export, the Nextcloud app, and a browser editor are deferred. This website is a feature showcase, not an editor. Calendar synchronization is separate and depends on the calendar provider installed on your device.

A little less in your head.
A little more on the page.

Make room for your day