Minimalist Markdown diary with app lock and your-own-cloud WebDAV sync.

SimpleDay is a beautiful, minimalist diary app built around one simple idea: one entry per day. No feeds, no clutter, no accounts to sign up for — just a calm space to write.
Write your thoughts, experiences, and memories in Markdown, and keep them private. Your entries stay on your device and, optionally, on a cloud server you control.
Features:
* Markdown support — formatting, lists, headers and more
* Live preview — toggle between edit and preview mode
* Minimalist, distraction-free interface
* One entry per day — a simple, focused approach to journaling
* Auto-save — never lose your thoughts
* App lock — protect the app with biometrics (fingerprint/Face ID) or your device PIN
* WebDAV sync — automatic backup to your own cloud (Nextcloud, ownCloud, etc.)
* Smart import — import existing entries from WebDAV on first launch
* Privacy first — no trackers, no ads, no analytics
Your data belongs to you. SimpleDay talks only to the WebDAV server you configure — nothing else.
SimpleDay is free software, licensed under the GNU GPLv3.
WhatsNew:
Fixed: with App Lock on, switching to another app for a moment asked for your
fingerprint again and threw away entry text you had not saved yet. The lock now
waits (5 minutes by default, settable to 0, 1, 5 or 15 in Settings), and the
entry you were writing stays open behind the lock screen.
Faster: the "+" button no longer reads every entry in the diary to find today's,
so it opens straight away on a long-running diary.