For Onyx BOOX e-ink tablets
BooxDay is a daily planner for Onyx BOOX tablets: a calendar, handwritten memos and handwritten task lists together on one calm screen — made for the pen, and for e-ink.
Latest version on the GitHub releases page. Open this page on your BOOX to download straight to the tablet.
Seventy-six seconds on a real tablet: picking a day, writing a memo, ticking off tasks, and carrying what's left into tomorrow. No sound, no staging tricks — just the app as you'd use it.
No jumping between a calendar app, a notes app and a to-do app. Tap a day and its events, memo page and tasks are already there — ready for the pen.
Every day gets a handwritten memo page, right under the calendar. Meeting notes, a Lisbon packing list, the idea that arrived at lunch — written in your hand, next to the day it belongs to. Full screen hides the calendar when you need the whole page.
Explore Memos →
Write one task per row, then cross it off with an actual stroke. Priorities, due dates, reminders and repeating tasks sit quietly behind each row — and in the morning, anything unfinished offers to move to today.
Explore Tasks →
Yesterday rarely finishes itself. BooxDay greets you with what's left over and lets you move each task to today, tomorrow or another day — or mark it done and move on. No guilt, no digging.
See how mornings work →
Set today's agenda as your BOOX sleep screen: schedule, open tasks and the day's memo, glanceable without waking the tablet. It's the paper planner's front page — updated by itself.
More thoughtful extras →
Real screens from the app, in the order you'd meet them through a day.
Scroll sideways for more →
Google has verified BooxDay's Google sign-in (October 2026). Connecting Google Calendar no longer shows the “Google hasn't verified this app” screen, and there is no longer a limit on how many people can connect.
On the way: full two-way sync with Google Tasks, and CalDAV calendars and tasks (iCloud, Nextcloud, Fastmail or your own server).
Every change, version by version: release notes.
Built for the BOOX first: no animations to smear across e-ink, no phone-sized buttons, and a pen treated as a first-class citizen.
BooxDay is not on Google Play: you install it from an APK file. That is called “sideloading”. It is a normal Android feature and takes about two minutes. You need an Onyx BOOX tablet with Android 10 or later and an internet connection (the file is about 85 MB).
Updates: BooxDay checks for a new version when it starts, asks you, then downloads and installs it itself; your memos, tasks and settings are kept. You can also check by hand in Settings > About > Check for Updates. The first time, Android asks you to allow installs from BooxDay.
Installed and already helping? BooxDay is free and stays free. If it earns its place on your BOOX, a coffee keeps it growing.
Open it, pick a day, pick up the pen. Everything else can wait until you want it.
Short version: only if you ask it to, and never through a BooxDay server — there isn't one.
Connecting a Google account is optional. If you do, BooxDay asks for access to:
BooxDay has no server and sends nothing to its developer. Your data stays on your tablet and in your own Google account, except when you use the optional AI features, which send what they need to OpenRouter on your own account. Read the full privacy policy.
Yes. No subscription, no ads, no “Pro” version. Why it is free.
BooxDay is open source: anyone can read the code on GitHub. Every version is signed with the same key, so updates install over each other and a tampered file won't. Download it only from this site or the GitHub releases page.
No. You can keep your calendar only on the tablet, or use Outlook. Google is only needed for Google Calendar and Drive backup.
Yes. Calendar, memos, tasks and search work without internet. Going online is only needed for calendar sync, Drive backup, AI features, updates, and the first download of the handwriting model.
They are optional and run on your own OpenRouter account. OpenRouter has free models, and BooxDay uses them when your account has no credit. Paid models are billed by OpenRouter to you, usually cents. Free models' providers may keep what you send; the privacy policy explains how to keep it private.
No. Updates keep your memos, tasks and settings. Uninstalling the app does delete them, so make a backup first (Settings > Data & Backup).
Onyx BOOX tablets with Android 10 or later. It has been tested on the Note Air3 C, Note Air5 C, Go 10.3, Go 10.3 Gen II (Lumi), Go 7 Gen II and Go 6 Gen II. Other BOOX models should work but haven't been tested; other Android tablets aren't supported, because BooxDay uses the BOOX pen system.
Have a different BOOX? Testers are welcome: share how it works on the GitHub issues page.
Installing from GitHub keeps BooxDay simple to release and lets it update itself. Google's sign-in review is done, so Google Calendar works for everyone.
Support and contributions. BooxDay is shared as is, without technical or product support. Bug reports and code contributions are welcome on the GitHub issues page, but there is no promise of a reply or a fix.
Download BooxDay, open it on your BOOX, and write tomorrow's first line before you put the pen down.
It is free: no ads, no subscription, nothing to unlock. It is made by one person, for people who plan their days on a BOOX. For the price of a cup of coffee, you help keep the best calendar for BOOX growing: new features, and fixes for new tablets and firmware.
Never required, and it does not buy support or features: BooxDay stays free for everyone. Thank you for using it.
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