The Twentieth Century app icon

The Twentieth Century

1900–2024, year by year

The century laid out the way it was actually lived — everything happening everywhere at once. Pick any year and see the whole world in it: the war, the election, the discovery, the song that was number one.

Download on the App Store

Free to download · iPhone & iPad

A Century, Fully Documented

Thirty-five years of research from Historycentral, organized so you can move through it by year, by region, by person, or by document

988
Events, each with a full account
554
Lives
145
Primary documents in full
120
Archival films

Nine Timelines, Running Side by Side

History does not happen in one column. The app is built around that fact.

📅

Every Year, a Cross-Section

Choose a year and see it whole — what was happening in the United States, in Europe, in Asia, in the Middle East, in Africa, in South America, and in the laboratories, all on one screen.

📜

Read the Sources Yourself

145 primary documents, complete and unedited — the Fourteen Points, the Zimmermann Telegram, the Japanese surrender, Churchill’s Iron Curtain speech — linked to the events they document.

🎥

Watch the Year

120 archival films, most of them one per year, streamed on demand. Newsreel footage of the century as its contemporaries saw it.

👥

554 Lives

The people who made the century and the ones it happened to, each with a full biography, cross-linked to every event they appear in.

🗺

The Century on a Map

Nearly a thousand events placed geographically. Slide through the years and watch where history was happening move across the world.

🌐

Four Languages

Every event, every biography, every year in English, Spanish, French and German — not machine output, but the full text translated and checked.

Everything, Everywhere, at Once

The nine parallel timelines that run the length of the century

United States 276
Technology 183
Europe 160
The Second World War 98
Asia 92
Africa 74
The Middle East 56
South America 44
The First World War 24

See It

Built to be read, not skimmed

On this day, and the century browsable by decade

Start anywhere

Every year and every region on one grid

The whole century at once

A single year across all regions

One year, all of it

An event with archival photograph and full account

The full account

Events placed on a world map by year

Where it happened

The library of primary source documents

Read the originals

The index of people of the century

The people

Free to Explore, Yours to Keep

Download it and roam the entire century. No trial, no subscription, nothing hidden behind a signup.

Free

The Whole Century

Every year from 1900 to 2024 is open from the moment you install it.

  • All 125 years and all nine timelines
  • Every event, with its archival photograph and summary
  • Every year’s overview, and the full almanac
  • The map, the index of people, and search
  • 1969 unlocked completely, films and documents included
One-time unlock

The Century, in Full

When you want the depth behind the summaries.

  • The complete account behind every event
  • All 120 archival films
  • All 145 primary documents, in full
  • All 554 biographies, complete
  • Dossier cards — export any event as an image

Twentieth Century Pro

$2.99

One payment. No subscription. Every future update included.

Download on the App Store

From Historycentral

Since 1989, Historycentral has created award-winning history-based learning tools trusted by educators, students, and curious minds worldwide. The Twentieth Century grew out of decades of that work — the events, the documents, the photographs and the newsreels — rebuilt as an app you can read.

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