Day One is a journaling app for Mac, iPhone, iPad, Apple Watch, Android, and the web. It's for anyone who wants to keep a private, long-term journal with text, photos, and memories.

Key features:

Write unlimited entries across unlimited journals, with Markdown formatting.
Add photos, videos, drawings, and audio recordings with transcription to entries.
Revisit past entries with On This Day, and find them with tags, search filters, and calendar and map views.
Stay consistent with daily prompts, templates, reminders, and journal streaks.
Protect your journal with end-to-end encryption, a passcode or biometric lock, and automatic backups.
Export entries to PDF, CSV, or JSON at any time.

The Mac app is on the Mac App Store and requires macOS 15 or later. The free Basic plan includes unlimited text entries with one photo per entry on one device. Silver costs $49.99 per year and adds unlimited photos and video and sync across devices, and Gold costs $74.99 per year and adds AI reflection features; paid plans start with a one-month free trial.