Foldwriter

ding!

Your iPhone Duo is now a typewriter.

Half-fold it and type a letter: paper on top, keys below, a bell near the end of every line. Pull the page, stamp the envelope, and send it to someone who isn't expecting it.

Download on the App Store $1.99 once. No ads, no account.
A 3D rendering of Foldwriter on an iPhone Duo, half-folded like a typewriter on a leather desk mat on an oak desk by a window, with “Dear Mum, thinking of you today.” typed on the screen

One sheet. One letter. One person.

Foldwriter is not a writing app. It is a letter machine, made for the short note you would never send as a text.

01 · type

Every key clacks

Real typewriter recordings, a carriage that moves, ink that lands a little unevenly, and a bell near the margin. Mistakes stay on the page. Type over them.

02 · pull

Pull the page

Tap Pull page, or on the Duo just close the phone. The sheet becomes an envelope waiting on the outside screen. Changed your mind? Go back, nothing is lost.

03 · post

Stamp it and send it

Type a name, pick a stamp, and it gets a dated postmark. Send it as a picture, a PDF, or a video of it typing itself, with sound.

Three machines. Each its own sound.

They differ in shape, keys and mechanism, and each plays its own recordings and haptics. All three are included.

Sunday, the mint 1950s portable, on a half-folded iPhone Duo on a desk (3D rendering)
SundayA 1950s portable. Hooded, mint, pillow keys, a soft and steady clack.
The Editor, the black 1920s desk machine with glass keys, on a half-folded iPhone Duo on a desk (3D rendering)
The EditorA 1920s desk machine. Open black frame, glass keys on levers, a heavy strike.
Rosso, the red 1969 pop portable, on a half-folded iPhone Duo on a desk (3D rendering)
RossoA 1969 pop portable. A red box, orange spools, square keys, a bright snap.

They don't need the app.

What arrives is a letter: the sheet, the envelope, the stamp and the postmark. Or a short video that re-types it, key by key, with the sound of the machine. It opens in Messages, Mail, WhatsApp, or anywhere else.

Made for the fold

Half-folded, the paper sits above the hinge and the keys below it. Open flat and held wide, the keyboard splits either side of the fold. Closed, the envelope waits on the outside. No Duo? It works on any iPhone.

A 3D rendering of an iPhone Duo opened flat on a leather desk mat, Foldwriter's wide layout with the keyboard split either side of the fold
Open flat: the keys split either side of the fold
A 3D rendering of a closed iPhone Duo with the addressed envelope waiting on its outer display
Closed: the envelope waits outside

Small machine, lots of character

Everything is included. There is nothing to unlock.

  • A real carriageMargins, a bell, a return lever and overstrikes. Backspace moves, it doesn't erase.
  • Three ribbonsBlack, red for the urgent bits, and blue.
  • Four papersBright Idea, Buttermilk, Homework and Jet Stream.
  • Five original stampsTulip, boat, moon, kite and lighthouse, with a dated postmark.
  • Sound you can feelRecorded typewriters and matching haptics. Plays on silent, like a video, unless you turn it off.
  • Keyboard friendlyType on a hardware keyboard, bell and all.
  • A letter boxKeeps what you sent, only on your phone.
  • English and DutchVoiceOver labels and Reduce Motion support.

No account. No ads. No subscription. No tracking.
Pay once, type forever.