Some open-source projects include a changelog as one of the top-level files in their distribution.
[3] Although the GNU (Automake) canonical naming convention for the file is ChangeLog,[4] it is sometimes alternatively named as CHANGES or HISTORY (NEWS is usually a different file reflecting changes between releases, not between the commits).
Some revision control systems are able to generate the relevant information for a changelog, if the goal is to include all changes.
Most wiki software includes changelogs as a fundamental feature (often called history in this context).
It helps to announce new features, latest releases, and relevant news directly in-app.