Kotodute is an app that delivers your words to your loved ones "just in case." Once a month, simply tap a button to check in and let it know you are fine. If check-ins stop for one month, the messages you prepared are delivered by email to the recipients you registered.
The name comes from the Japanese word "kotodute" (言伝) — entrusting your words to someone so they can be delivered to a person you cannot reach directly.
When you start watching, a dedicated sheet is created in your Google Drive, and a small watch program is installed inside it.
Kotodute has no developer server. Your messages, recipients, and settings are all stored inside your own Google account (a sheet in your Google Drive). No third party — including the developer — can see their contents.
Emails are also sent from your own Google account. Your precious words are protected with the same strength as your Google account's password and 2-step verification.
In addition, the app itself is locked with Face ID or a passcode so no one else can open it, and once your messages have been delivered, the messages and recipients are automatically deleted from the sheet.
Even if you forget to check in, your messages are never sent right away. You are first notified by a reminder email, and if check-ins still stop, the confirmer you chose is asked whether you are safe. Messages are sent only when no confirmation is received — a two-step safeguard.
