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The Trace The ritual Who it's for Offer FAQ

letters that wait for them

Letters used to mean something. They still can.

Foldhush is a sealed love-letter app for iPhone — for the long-distance partner, the bestie three time zones over, the parent you'd write to if texting were enough. Choose a Trace: a colour, a sound, your voice, a haptic. They open it — and a room arrives with the words.

Reserve a Founding Letter $49.99 once — first 500 only

iPhone · launching June 2026 · iOS 17.4+

for the one I miss tonight

my love,

— yours

← drag the flap to open · or press Enter →

A love letter app for couples in a long-distance relationship — and the best friends and family between you

Why this exists

Why a slow love letter app exists

My wife told me how, when she was a child, children used to scent paper letters with perfume and save them in boxes. She would re-smell them years later — and the memory came back whole.

We can't deliver smell on a phone. But we can deliver the next-strongest cross-modal triggers — voice, ambient sound, color, and haptics — woven into a single signature.

We call it the Trace.

Alvaro — building Foldhush, one person, Madrid

the founding letter

After June 2026, you cannot become a Founding Letter.

The wax monogram, the Founders Trace, the personal first letter from Alvaro — these never reopen after launch. Join the waitlist. If you're in the first five hundred, you're a Founding Letter, and you get:

  • $49.99 once. Lifetime access. No subscription, no renewal, no churn. Pay once, write forever.
  • A custom wax monogram hand-illustrated in your initials. Yours on every envelope you send.
  • Day-one access. The earliest invites go to the Founding 500.
  • A Founders Trace. A sixth, never-public Trace — yours and the other 499's only.
  • The first letter. A personal letter from the founder, sent the day you install. Open it. See what we built.
Claim a Founding Letter
  • Lovebox frame$90 + $5/mo
  • Sandboxx printed letter$3 each
  • Box of stationery + stamps~$40/yr
  • iMessagefree · forgettable

Public price after launch

$39.99 /year, subscription

7-day trial · weekly available at $5.99/wk

Founding 500 · lifetime access

$49.99 once

≈ £40 · ≈ €46 · ≈ ¥7,500 · ≈ ₩69k · paid once, never again.

No subscription, no renewal. Your letters live in the app and stay exportable as PDF/MP3 — see Pledge ii.

The Trace

Five sensory love-note signatures. One yours.

A Trace is four things, played in lockstep when your letter is opened: a colour aura, an ambient soundscape, your whispered voice, and a haptic envelope tuned to the audio waveform. Pick one of five. Or compose your own.

Tap a card — the page takes on its colour.

Rose Rain

Calm. Intimate. Aching.

ambient
soft rain on a windowpane
voice
“hi…”
haptic
audio-synced, AHAP

Ocean Dawn

Peaceful. Expansive. Hopeful.

ambient
waves at first light
voice
“good morning…”
haptic
audio-synced, AHAP

Music Box, Honey

Nostalgic. Warm. A little playful.

ambient
music box, four-bar loop in 3/4
voice
“thinking of you…”
haptic
audio-synced, AHAP

Fireplace, Sage

Cozy. Grounded. Safe.

ambient
fireplace crackle, occasional pop
voice
“come closer…”
haptic
audio-synced, AHAP

Vinyl Midnight

Romantic. Slow. Deep.

ambient
vinyl crackle with a low hum
voice
“tonight…”
haptic
audio-synced, AHAP
+

Hum your own

Yours alone.

Record three to eight seconds of voice, humming, or whistling. Foldhush translates the waveform into a haptic signature only your letters carry. Premium.

new at launch

Five seconds. Five senses.

How a Foldhush love letter opens — the five-step ritual.

Every Foldhush letter opens the same way. Slow. No notifications. No badges. No autoplay. The envelope, your thumb, and what's inside.

  1. 01 step

    Tap

    An envelope sits in your drawer. Sender's name. Their wax monogram. A Trace colour you've started to recognise like a perfume bottle on a dresser.

    single soft thump · low haptic transient

  2. 02 step

    Slide

    Drag the flap with your thumb. The paper rustles. The faster you slide, the higher the pitch, the stronger the buzz. It's not a button. It's a gesture.

    continuous paper-rustle, pitch-shifted · continuous haptic, intensity = velocity

  3. 03 step

    Crack

    The wax splits. Sharp. A burst of colour particles, the Trace's tone.

    transient snap · max-sharpness haptic · 22-particle bloom

  4. 04 step

    Unfold

    The paper opens in three folds, the way a real letter does. Each fold a small crinkle.

    three soft crinkles · three descending haptic transients

  5. 05 step

    Bloom

    Their voice whispers. The ambient sound rises. The screen breathes their colour. You read the letter inside a room they made for you.

    voice whisper · 30-sec ambient loop · colour aura · audio-synced haptic envelope

Reaction haptics. When they open your letter, your phone buzzes with their Trace. The loop closes without a chat thread.

Keepsake drawer. Every letter lives forever. Open it in five years. The ritual plays again, the same way.

Open When. Schedule a letter for an anniversary, a deployment, a birthday in 2031. They can't open it until that moment.

Who it's for

A love letter app for long-distance couples, best friends, and family.

Foldhush is not a social network. There are no likes. No follows. No public profiles. Only the person you're writing to and the room your letter makes when it opens.

For long-distance couples

Distance, with weight.

“We were 6,000 miles apart for 14 months. We sent a thousand iMessages. I remember three of them.”

Foldhush is the love-letter app you reach for when a text isn't enough. Deployments, visa years, the semester abroad, time zones that don't match. Distance needs a ritual.

For best friends

Friend-distance is distance.

“They moved for a job. We text every day. I still miss them on Tuesdays.”

We grew up on perfumed paper letters tucked in birthday boxes. Foldhush is for the friend who knows your handwriting. Send a Trace they'll recognise before they read a word.

For families

For parents, grown kids, and the years between.

“I want my dad to hear my voice on a slow Sunday. Not on FaceTime. On his schedule.”

Slower than a call. Warmer than a text. A letter that waits in a drawer until they're ready.

In writing

The Founder's Pledge.

We're asking for your email and, eventually, $49.99 once. The least we can do is put what we promise on the page — in plain English, where every visitor can hold us to it.

  1. i

    $49.99 once. Lifetime access. No subscription.

    A one-time payment through Apple's in-app purchase. Lifetime access for as long as Foldhush operates the iOS app. No annual renewal, no auto-charge, no churn. Written into Terms §4 before launch — it survives acquisition, App Store changes, and product pivots.

  2. ii

    If we shut down, your letters come with you.

    If we voluntarily wind down Foldhush, we give at least 90 days notice and a self-serve archive: every letter as PDF, every voice file as MP3, every custom Trace as an AHAP file. In the event of insolvency or acquisition, we use commercially reasonable efforts to provide equivalent export. We will not sell your data. We will not hold your keepsakes hostage.

  3. iii

    Subscriptions only. No ads, no letter-content analytics, no AI training on what you wrote.

    We use TelemetryDeck for anonymous product metrics. Letter bodies and voice recordings are never read by us and never shared with any third party. If we ever change this, you get notice and a one-click export first.

Alvaro — building Foldhush, one person, Madrid.

Join the waitlist

Reserve a place in the love-letter drawer.

The first 500 reservations lock $49.99 once, lifetime access. After that, $39.99/yr subscription. (See the Founder's Pledge.) One email below — that's all.

I'd write to my…

No newsletter. No drip campaign. One email a week before launch. One the day we launch. We will not sell your address — we have nothing to sell.

Answered

Love-letter-app questions.

What is Foldhush?
An iPhone app for writing and sending sealed, multi-sensory letters — to your partner, best friend, parents, or future self. Each letter carries a Trace: a colour aura, an ambient soundscape, a whispered voice, and a haptic signature played in lockstep when the recipient opens it.

When does it launch?
Target: June 2026 — iPhone only, iOS 17.4 and up. If the date slips, every waitlist member is emailed the day it changes. The Founding 500 list closes at 500 or launch day, whichever comes first.

Does my partner / friend need an iPhone too?
For the full ritual — yes. On iPhone, the SMS magic-link installs the app in one tap. On Android, they get a degraded web reader: still envelope, paper unfold, voice via plain audio. Your letter still arrives. You don't lose them.

What's the Founding Letter deal?
The first 500 waitlist members pay $49.99 once, lifetime access — no subscription, no renewal. Plus a hand-illustrated custom wax monogram, a Founders Trace nobody else can use, and a personal first letter from Alvaro the day you install. After launch, the only option is the $39.99/year public subscription.

Will you read my letters?
No. Letters and voice files are stored in Supabase with row-level security and AES-256 encryption at rest. Voice files are served via short-lived signed URLs (≈ five minutes). We do not use letter content for analytics, training, or any other purpose. Account deletion cascades through every row and is irreversible.

What happens if Foldhush shuts down?
Voluntary wind-down: 90 days notice and a self-serve archive (every letter as PDF, voice as MP3, custom Trace as AHAP). Insolvency or acquisition: commercially reasonable efforts to provide the same. See the Founder's Pledge.

Is there AI in the letters?
No. Foldhush is intentionally AI-free in the writing. The whole point is your own words, in your own voice. We're not interested in generating letters for you.

before you go

press the seal