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Software · Office & notes

Iotas

Iotas is a note-taking program, available on Linux: sync across devices and Markdown support.

  • Completely free
  • Linux
  • Open source

Overview

Iotas is a note-taking program, available on Linux.

Features described in its Flathub listing and on its official website: sync across devices and Markdown support.

Services and protocols mentioned: Nextcloud.

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 note taking” — Flathub, 10 November 2026
  • “Optional speedy sync with Nextcloud Notes” — Flathub, 10 November 2026
  • “In preview: export to PDF, ODT and HTML” — Flathub, 10 November 2026
  • “Writing in markdown is supported but optional, providing” — Flathub, 10 November 2026
  • “Syntax highlighting with themes” — Flathub, 10 November 2026

At a glance

All of Iotas 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

Iotas aims to provide distraction-free note taking via its mobile-first design. Featuring Optional speedy sync with Nextcloud Notes Offline note editing, syncing when back online Category editing and filtering Favorites Spell checking Search within the collection or individual notes Focus mode and optional hiding of the editor header and formatting bars In preview: export to PDF, ODT and HTML A convergent design, seeing Iotas as at home on desktop as mobile Search from GNOME Shell Note backup and restoration (from CLI, for using without sync) The ability to change font size and toggle monospace style Writing in markdown is supported but optional, providing Formatting via toolbar and shortcuts Syntax highlighting with themes Inserting images A formatted view The ability to check off task lists from the formatted view Slightly more technical details, for those into that type of thing Nextcloud Notes sync is via the REST API, not WebDAV, which makes it snappy There's basic sync conflict detection Notes are constantly saved Large note collections are partially loaded to quicken startup Notes are stored in SQLite, providing for fast search (FTS) without reinventing the wheel. Plain files can be retrieved by making a backup (CLI).

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Last technical check: 6 November 2026
  • Description from Flathub — AppStream (Flathub)

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