How can we help?

Letters take three days to deliver — that's by design. The recipient will see it appear in their inbox seventy-two hours after you sent it. If three days have fully passed and they still don't see it, email us with the approximate send date and we'll investigate.

Three hundred words is roughly the threshold where you can't write a letter on autopilot. It forces a small amount of thought, which is the whole point. We may adjust the number over time, but we won't remove the minimum.

Only after your previous letter has been delivered to the recipient. You can't queue up multiple unread letters to the same person — Letterss is turn-based on purpose. If you want to add to what you said, write a longer follow-up after they reply.

No. Letters are encrypted on your phone before they reach our servers, using a key that lives only in your iPhone's Keychain. We can see who sent a letter to whom and when, but not what the letter says. Read more in the privacy policy.

This is the trade-off of true end-to-end encryption: your private key lives in the iPhone you signed up on. If you sign in on a new device, you can read every letter you receive from that point on, but past letters that were encrypted to your old key will not be readable on the new device.

Before you switch phones, you can email us to request a plain-text export of every letter on your account, and we'll send it after verifying it's really you.

Open the app, go to Settings → Delete Account. This removes your profile, your friend graph, and every letter you've sent or received. The encryption key on your device is also wiped. The action is permanent and cannot be undone.

If you can't sign in, email us from the address associated with the account and we'll handle it manually.

Open the letter, tap the menu, and choose Report. You can also block the sender from your contacts list. Reports are reviewed by a human, and the most severe violations result in permanent account removal. If you are in immediate danger, contact local emergency services first.

Email [email protected] from any address you might have used and we'll help locate the account.

Not yet. iOS first.

Email and texting are designed for instant, short, frequent messages. Letterss is designed for slow, long, deliberate ones. The constraints — three days, three hundred words, one at a time — are what make a letter feel like a letter and not a notification.