A private diary for two

Two wings,
one flight.

One blind question a day, growing into a lasting, end-to-end encrypted conversation. No algorithms. No audience.

Duoheart sign-in screen

Today's question

What was your favorite moment from our last trip?

You each answer separately, blind to the other's reply. Once both are in, the answers unlock to each other at the same moment - and become a conversation of their own. Five questions a day, a story that keeps growing.

Get Duoheart - try it freeTry it solo today. Invite them when you're ready.
Answering the daily question, late at night

Moments

What grows in the quiet, between two people.

Two people sitting close at dusk

Same city. Same quiet. Same two.

Two hands resting together

Some things don't need to be said.

Answering a question by phone light

One more line of the story, every night.

The moment that makes it work

What do you find most beautiful about the life we're building?

You

That we never stopped being curious about each other. Even on ordinary days.

Them

How safe it feels. I can say anything here and it stays ours.

You answer blind. Both answers lock - then unlock to each other at the same moment.

Features

Built on
privacy.

01

End-to-end encrypted

The server never sees the content of your messages - only the two of you do.

02

Five questions a day

No endless scroll. Five meaningful questions, answered blind, that open real conversations.

03

Photos & videos, sealed

Every photo and video is compressed and end-to-end encrypted before it ever leaves your phone.

04

Custom backgrounds

Choose from default scenes or add your own photo - always readable under a soft overlay.

05

Answers lock forever

Once given, an answer can never be edited or deleted - immutable at the database level.

06

16 languages

Your account is created in your device's language, changeable anytime from Profile.

Built to stay two - never a third, whether that's an algorithm or an audience.

Duoheart design principle

Pricing

One conversation. Every day. Just the two of you.

$4.99/mo
Unlimited daily question bankEnd-to-end encrypted chat · video & voice callsCustom backgrounds · 16 languages
Start 3-day free trial

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Two people, close, at the end of the day