Built by a history reader

Chronarium grew out of a problem I kept hitting while working through a world civilizations course, chapter by chapter. A chapter tells its events one after another, but the past happened all at once. That makes it hard to see what else was going on at the same moment, or how long one era lasted next to another. I wanted to see each chapter’s events side by side, so I built the app for my own reading first.

Chronarium is a Mac app for building history timelines. Events and periods sit in lanes on one shared time axis, so what happened at the same time in different places lines up, the way Rome and Han China can be seen side by side. Any event or period opens into a concept map of its people, causes and consequences, and closing the map returns you to the same spot in time.

I’m Michael Yan, a solo developer, and I make Chronarium. It is sold by Polymath Studios LLC in Baltimore, Maryland. Questions, bug reports and ideas are welcome at support@chronarium.app, where I read every message.

• Works offline on a Mac. Chronarium runs on Apple silicon and Intel Macs with macOS 13 or later, and it works without an internet connection.
• Files stay on your Mac. Timelines are files on your own machine, with no account and no cloud copy.
• Paid, not ad-supported. Chronarium is paid software, so there is nothing to sell about the people who use it.