Daybook
A personal diary, task and activity log that stays on your device.
Daybook records your day — tasks, notes, activities, places, birthdays and holidays — in a database on your own phone or computer. It has no account system and no server of its own. Connecting a Google account is optional, and every feature that leaves the device is off until you switch it on.
Built by an independent developer for people who want a thorough daily log without handing that log to somebody else's cloud.
What you can do with it
Tasks & subtasks
Separate work and personal lists, with due dates, recurrence and a full completion history.
Notes
Written notes with sketches and photos attached, kept alongside the day they belong to.
Activity log
A running record of what you did and where, which you can fill in by hand or have written for you from saved places.
Places
Save somewhere you go often and Daybook can log arrivals and departures for you.
Dates that matter
Birthdays, custom recurring events, and public holidays you choose to import.
AI assistant
An optional assistant tab powered by Google Gemini, using an API key you supply yourself.
Why Daybook asks for a Google account
Signing in is entirely optional — Daybook works fully without it. It exists so the app can back up to your Drive and, on desktop, write your dated tasks into your calendar. Daybook has no login of its own, so there is nowhere else for that data to go. Here is every permission the app requests and what it is used for.
Google Drive backup drive.file
https://www.googleapis.com/auth/drive.file
Used to upload a copy of Daybook's own database, plus images attached to your notes, so you can restore on a new device or keep two devices in step. This scope grants access only to files Daybook itself created — the app cannot see, list or open anything else already in your Drive. The backup sits in your own Drive under your own account; the developer has no access to it.
Google Calendar sync calendar
https://www.googleapis.com/auth/calendar
Used so that tasks you give a date appear as events in your own Google Calendar, visible from any device signed into that account. Only the tasks and events you choose to sync are written — never your notes, your activity log, or anything else in the app.
This route is offered in Daybook's desktop build. On Android there is a second, separate option that writes to your device's own calendar app using the ordinary OS calendar permission and no Google account at all; that is the route the Google Play version uses today.
Your email address and basic profile openid · email · profile
Read once after sign-in purely so the app can show you which account is currently connected. Daybook does not read your contacts, your mail, or any other part of the account.
Sign-in tokens are stored on your device alongside the database and are used only for the calls described above. You can withdraw Daybook's access at any time at myaccount.google.com/permissions.
What Daybook does not do
- No ads, no analytics, no trackers, no data brokers — none are built into the app.
- No account to create, and no Daybook server for your entries to sit on.
- Your notes, tasks and logs are never transmitted to the developer.
- Nothing leaves your device unless you turn on the specific feature that sends it.
The privacy policy goes through this feature by feature — including location, microphone, camera and the AI assistant — and says plainly where each one sends data, or that it sends none.