Words sent with intention.
Received when the time is right.
Write a letter
Timed or instant. Attach photos or voice notes.
Seal it with a date
Or send it right now. Your choice every time.
It arrives when ready
They get a notification. The mailbox flag goes up.
Create a free account and every letter goes into your keepsake archive — yours to read anytime.
Pick a theme for your account. It applies across every RelationshipOS app, and you can change it anytime in Settings.
Sanctuary
Warm & soft. Light or dark.
Garrison
Dark, focused, field-instrument.
Words worth waiting for
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Good morning
No letters waiting
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Future Me
A letter to your future self
Someone else
Enter their email below
Timed delivery
Choose when this letter arrives
Notify me when read
You'll know the moment they open it
Attachments (photos · voice notes)
You can edit or stop this letter any time before it's delivered.
From Someone
A letter written with care…
Opens in
Every letter you've received, kept forever. Tap a stack to read.
Start typing to search your letters
Export all your received letters as a beautifully formatted PDF — a keepsake you can print and hold forever.
What's included
Your letters stay private and are never shared.
Share the link and they can read your letters without signing up first. If they create an account, you're paired forever.
They'll receive letters you write to them even without an account. If they sign up later, letters transfer automatically.
Unlock unlimited letters, the full keepsake archive, and PDF exports.
Letters in Time
Unlimited letters · timed delivery · voice notes · PDF export.
Couples · All Access
Both partners · all 8 RelationshipOS apps · full sync.
Secure checkout by Stripe · Cancel anytime
Connected People
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Subscription
Appearance
Theme — applies across every RelationshipOS app
Sanctuary
Warm & soft. Light or dark.
Garrison
Dark, focused, field-instrument.
Dark Mode
Easier on the eyes at night
Notifications
Letter arrivals
When a letter unlocks
24h reminders
The day before a letter arrives
Read receipts
When someone reads your letter
Your Data
Letters in Time · Part of RelationshipOS