MuseScore is a scorewriter for Windows, macOS, and Linux supporting a wide variety of file formats and input methods. It is released as free and open-source software under the GNU General Public License. MuseScore is accompanied by a freemium mobile score viewer and playback app, and an online score-sharing platform. History MuseScore was created as a fork of the MusE sequencer's codebase. In 2002, Werner Schweer, one of the MusE developers, decided to remove notation support from MusE and create a stand-alone notation program from the codebase. The MuseScore.org website was created in 2008, and quickly showed a rapidly rising number of MuseScore downloads. By December 2008, the download rate was up to 15,000 per month. Version 0.9.5 was released in August 2009. By October 2009, MuseScore had been downloaded more than one thousand times per day. By the fourth quarter of 2010, MuseScore was being downloaded 80,000 times per month. At the end of 2013, the project moved from SourceForge to GitHub, and continuous download statistics have not been publicly available since then, but in March 2015 a press release stated that MuseScore had been downloaded over eight million times, and in December 2016 the project stated that version 2.0.3 had been downloaded 1.9 million times in the nine months since its release. The MuseScore company uses income from their commercial sheet music sharing service to support the development of the free notation software. In 2017, the MuseScore company was acquired by Ultimate Guitar, which added full-time paid developers to the open source team. In April 2021, it was announced that a parent company, Muse Group, would be formed to support MuseScore, Ultimate Guitar, and other acquired properties (including Audacity). From 2021 to June 2022, the MuseScore company relocated its headquarters to Cyprus with Muse Group. Features MuseScore's main purpose is the creation of high-quality engraved musical scores in a "What-You-See-Is-What-You-Get" environment. It supports unlimited staves, linked parts and part extraction, tablature, MIDI input and output, percussion notation, cross-staff beaming, automatic transposition, lyrics (multiple verses), fretboard diagrams, and in general everything commonly used in sheet music. Style options to change the appearance and layout are available, and style sheets can be saved and applied to other scores. There are pre-defined templates for many types of ensembles. Functionality can be extended by making use of the many freely available plugins. MuseScore can also play back scores through the built-in sequencer