Learn history, one real photo at a time.

Scroll without the brain rot. Every swipe is a real photo or film from a public archive, explained in under a minute. You get ten a day, then it ends.

Free to startNo accountNo ads

The iPhone app is in App Review. It works in your browser today.

The boy in the mailbag, c. 1900, United States
c. 1900United States

The boy in the mailbag

This letter carrier posed with a boy in his mailbag around 1900, as a joke. Parcel post began on January 1, 1913, and within weeks an Ohio couple did mail their baby son to his grandmother, for 15 cents in stamps and insured for $50. Postal officials soon banned mailing children.

This is the real app, running live. Scroll it, tap a story, guess a year.

385real stories
67film clips
11collections
3fact-checks on every story

A history learning app with a stopping point

It feels like the feeds you already scroll, and you finish with ten real things learned.

Swipe

Ten real stories a day. Each is one photo or film and a caption you can read in under a minute. Then the feed ends, and you have spent about ten minutes.

Guess the year

Some stories hide their date until you guess. Trying first makes the answer stick, and a timeline shows how close you came.

Keep what you learn

Save stories, share them as a picture or a clip, open the source, or read the longer version of one that caught you.

Every picture comes from a public archive

Every photograph and film comes from a collection anyone can look up, and each story links to the original. Nothing is AI-generated or colorized by software.

  • Written from at least two sources
  • Checked by two independent fact-checkers
  • Rights to every image checked three ways
Library of CongressNational ArchivesSmithsonianThe MetNASA
The boy in the mailbag, United States
Source: National Postal Museum, Smithsonian Institution

Watch the past move

Historidex includes short clips of real film from the 1890s onward: street scenes, stunts, workers, and a pair of cats in boxing gloves.

Share any clip as a video, or send the link and it opens right on the story.

  • 67 film clips so far
  • Share or download a clip

Pick what you are curious about

From the first photograph of a person to ancient objects and early color. Each collection has its own page.

Start free

Free

$0
  • Ten stories a day
  • Guess-the-year quiz
  • Save and share
  • No account, no ads

Historidex Pro

$2.99 a month
  • No daily limit
  • Everything in Free
  • Cancel any time

Good to know

What is Historidex?

A history learning app that works like a feed. Every screen is a real photo or film from a public archive, with a short caption that explains it in under a minute.

Is Historidex free?

Ten stories a day are free, with no account and no ads. Historidex Pro is $2.99 a month and removes the daily limit.

Where do the photos and films come from?

From public collections such as the Library of Congress, the National Archives, the Smithsonian, the Met and NASA. Every story links to its archive record, so you can see the original.

How do you know the stories are true?

Each story is written from at least two sources, then checked by two independent fact-checkers. The rights to every image are checked three ways, so you only see pictures that are free to use.

How does the guess-the-year quiz work?

Some stories hide their year. You pick one of three, then see your guess on a timeline next to the real answer. Guessing first makes the answer easier to remember.

Do I need an account?

No. There is nothing to sign up for. What you save stays on your device.

Is there an iPhone app?

It is in App Review now. Until it is out, Historidex works free in your browser.

How many notifications does it send?

One, and only if you want it: a daily reminder at 8 a.m., noon or 8 p.m.

Ten real stories, about ten minutes.

Open Historidex, read today's ten, and you are done for the day.