A milestone birthday letter

Write Self prints your letter on heavy paper, seals it in an envelope, and posts it back to you on the date you choose — anywhere from six months from now to five years from now. Most people pick one year.

We don't send emails. We don't push notifications. We don't keep your letter on a screen. The only place your letter exists, after you write it, is encrypted in a database — and then, on the morning you chose, in your hand.