Muoto

Muoto lets you customize icons, fonts and pixel density in Sailfish OS. It bundles the former Theme pack support engine (systemd services, privileged helper, and compatibility with harbour-themepack-* packages) in a single app.

GitHub license GitHub issues GitHub releases Donate on Liberapay

Features

Home mosaic Configure icons Configure fonts
Display density Dynamic icons Low-power mode

  • Icon theming (native, Jolla, Android).
  • Style missing app icons (theme look for apps not in the pack).
  • Dynamic clock and calendar icons on the homescreen.
  • Font theming.
  • Display density (pixel ratio, launcher icon size).
  • Low-power mode settings.

Using Muoto

Using Muoto — apply themes, display density, restore, and other app features.

Download theme packs

Download theme packs from OpenRepos.

Create theme packs

Create theme packs — documentation (icons, fonts, packaging with the Sailfish SDK).

Developers

Developers — architecture, testing, debugging, and auto-apply automation (maintainers and contributors). See also AGENTS.md at the repository root for coding-agent orientation.

Translate

Request a new language or contribute on the Transifex project page.

Builds

Builds for aarch64, armv7hl and i486 are available on OpenRepos.

Migration from UI Themer

  • Restore your current theme from UI Themer (sailfishos-uithemer) before swapping packages.
  • Uninstall sailfishos-uithemer.
  • Install harbour-muoto (also replaces the merged Theme pack support / harbour-themepacksupport package).
  • Re-apply your preferred theme packs in Muoto.
  • App settings are not auto-migrated; re-apply packs if needed after upgrading.

Credits

  • Opal QML modules (About, SupportMe, LinkHandler) by Mirian Margiani.
  • Theme pack support engine by fravaccaro (formerly separate themepacksupport-sailfishos package).
  • Partially based on Icon pack support GUI.
  • Dynamic icons implementation and Lipstick nudge for native apps inspired by Clockwork by dseight.
  • Thanks to Dax89 for C++ and QML help.
  • Thanks to Eugenio_g7 for the One-click restore service.
  • Thanks to LQS for Android DPI on Xperia XA2.
  • Thanks to dt.iki.fi/sailfish-os-change-default-font.
  • Thanks to all testers.

AI disclosure

  • Human foundation. Theme pack support and UI Themer — the engine behind icon, font, and density theming on Sailfish OS — were authored, designed, and developed without AI input.
  • Cursor-assisted work. During the Muoto rename and ongoing maintenance of this repository, Cursor was used as an IDE with AI assistance for tasks such as documentation updates, code exploration, UI polish, translation cleanup, and RPM packaging tweaks. Output was always reviewed and edited by the maintainer before commit.
  • Not a substitute for testing. AI suggestions do not replace rigorous testing on Sailfish OS hardware, reading the code, or applying your own knowledge. Generated changes are treated like any other patch: understand it, test it, then ship it.

Muoto’s theming engine is human-built; Cursor helped maintain and polish what wraps it.

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