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Software · Office & notes

Simple Diary

Simple Diary is a journaling program, available on Linux: Markdown support, themes and dark mode.

  • Completely free
  • Linux
  • Open source

Overview

Simple Diary is a journaling program, available on Linux.

Features described in its Flathub listing and in its GitHub repository: Markdown support, themes and dark mode.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Simple and lightweight diary app” — Flathub, 10 November 2026
  • “Saves entries in standard markdown” — GitHub, 10 November 2026
  • “Dark mode” — GitHub, 10 November 2026

At a glance

All of Simple Diary is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Designed to be easy to use and be out of the way, to let you focus on documenting and reflecting over your daily life. A few notable features are: Saves entries in standard markdown Adding images to your entries Scales on desktops, laptops, tablets and phones Dark mode

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

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