Not Buk
A notebook that feels like paper. Write, sketch, and speak your thoughts into real pages — on a shelf of notebooks that are yours alone.
Download on the App StoreEverything a real notebook does. And then some.
Notebooks & covers
Build a shelf of leather-bound notebooks. Pick a cover color, add a cover photo, and choose your paper — ruled, or something all your own with a custom paper background.
Pages that turn
Flip through your notebook with a 3D page-turn animation and the soft sound of paper. Not Buk remembers the page you left off on.
Voice notes, transcribed
Tap the mic and talk. Your voice note lands on the page along with a transcript — generated entirely on your device. Your audio never leaves your phone.
Photos on the page
Pull photos from your library straight onto a page, like tucking a snapshot between the leaves of a diary.
Write & sketch
Type along the ruled lines or draw freely in ink — doodles, diagrams, margin notes. Finger or Apple Pencil, it all stays on the page.
Quick capture
A thought arrives, you catch it. One tap records a voice note or jots a line straight onto today's page in your diary — no digging through menus.
Lock your diary
Some notebooks are private. Lock any notebook behind Face ID, Touch ID, or your device passcode.
Export pages
Share any page as a crisp image — paper texture, handwriting, photos, and transcripts, exactly as they appear in your notebook.
Private by design
Your notebooks live on your device, not on our servers — because we don't have any. No accounts required, no analytics, no tracking, no ads. Even voice transcription happens on-device using Apple's speech frameworks.
Read the full privacy policy.