Development builds from MuseScore's master branch are intended for testers only, and will not be used otherwise. they'll come several times each day, but could also be more or less frequent, counting on how often there are changes to the code. Development builds are created automatically, so you'll be the primary human to check a specific build... Occasionally, even basic functionality could also be broken.
To obtain the newest development build, see:
- Development builds for Windows (Archive)
- Development builds for macOS
- Development builds for Linux
At times there also development builds of non-master branches, like recently for the two.3 branch. These are alleged to be previews of what is going to or may become subsequent minor releases.