Chrono-Shift · Eras Expert

Eras Expert

Four tight, back-to-back spans of time. Every year counts.

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Classic Expert

Today's eras, oldest first

A new board arrives at midnight.

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Play past Eras boards (Chrono-Shift+)

Restored. Collapsed. Your record

Your Eras Expert games. Finish the board to add to your streak.

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How to play

Sixteen moments from history, four eras. Find the four events that belong to each span of time. A new board arrives every day at midnight.

Tap four events you think happened in the same era, then press Submit. Get it right and the group locks in with its dates.

From widest to narrowest

Expert boards use four back-to-back spans of time, either four decades in a row, or two centuries then two decades. The eras stay hidden until you find them.

A wrong group costs one of your four mistakes. One away… means three of your four belong together.

Tip: start with the era you're surest of. Fewer events left makes the narrow decades easier to spot.

Add to Home Screen

Play Chrono-Shift like an app, one tap from your home screen.

  1. 1 In Safari, tap the Share button at the bottom of the screen.
  2. 2 Scroll down and tap Add to Home Screen.
  3. 3 Tap Add. Chrono-Shift appears with your other apps.