Deadman Switch vs DeadSender

Dead Man's Switch checks that you're OK. Choose how often you'll check in, anywhere from once a day to once a year. If you miss your deadline, we remind you on your phone. If you still don't check in, the people you chose get an email with the message you wrote. • Check in with one tap: in the app, from a widget, a notification, Siri or Control Center • A live countdown shows exactly how long you have • See when your contacts would be emailed, and who • Every check-in is confirmed by our server, so what you see is what will happen • Reminders every day and before your deadline • Write one message for everyone, or a personal one for each person • If you check in after an alert, your contacts hear that you're OK Use it for solo hikes and travel, living alone, health conditions, or peace of mind for the people who care about you. Dead Man's Switch is not an emergency service. If you are in danger, call 911 or your local emergency number.

Some things are too important to leave unsaid. DeadSender is a private, encrypted dead man's switch — a digital service that holds your most important messages and delivers them to the people who matter, but only if you can no longer check in. WHY DEADSENDER? Life is unpredictable. An accident, sudden illness, or simply running out of time — there are countless reasons you might not get to say what needs saying. DeadSender makes sure your words still reach the people you love. CHOOSE YOUR BRAND. We love DeadSender, but it's not appropriate for everyone. Choose the brand you want to use: CherishSender for friends and family, FinalSender if you're a bit more formal, LastSender for business contacts, DeathSender for the morbidly funny and LivingSender for a more positive feel. Not only can you choose your brand in app, but match which brand gets sent to which contacts. HOW IT WORKS 1. Write your messages — letters to your spouse, instructions for your kids, account passwords for a trusted family member, anything you want delivered. 2. Choose your contacts — pick who receives what, by email. 3. Check in regularly — a simple tap proves you're okay. Skip a check-in, and a grace period begins with reminders before anything is sent. 4. Stay private, stay in control — edit, update, or delete anything anytime. Nothing leaves your account until it's triggered. FEATURES • End-to-end encryption — messages encrypted on your device, so not even we can read them • Email delivery with attachments — photos, videos, voice recordings, documents • Trustees — trusted people who can verify and trigger delivery if needed • Customizable schedule — check-in intervals from 1 hour to 30 days • Grace period safety buffer — push, email, SMS, and even automated phone call reminders before anything is sent • Test mode — verify the system works end-to-end without sending real messages PRIVACY & SECURITY • AES-256-GCM encryption with PBKDF2 key derivation • Zero-knowledge — the passwords, codes, and security questions you set are the only keys • No data sold, no ads, no tracking • Delete your account and data at any time USE CASES • Final letters to loved ones • Estate and account information for executors • Legacy messages for children to be opened on milestone birthdays • Time-capsule deliveries • Important confessions, apologies, or words left unsaid • Last instructions for your business or partners Phone and SMS check-in service is available with the following locations and services: Satellite Services: Inmarsat Satellite Network (+870), International Networks (+883), International Networks (+882), Iridium satellite numbers (+881) North America: • Anguilla • Antigua and Barbuda • Bahamas • Barbados • Bermuda • Canada • Cayman Islands • Costa Rica • Curaçao • Dominica • Dominican Republic • Greenland • Guadeloupe • Guatemala • Honduras • Jamaica • Martinique • Puerto Rico • Saint Lucia • Saint Pierre and Miquelon • Sint Maarten (Dutch) • Trinidad and Tobago • Turks and Caicos Islands • U.S. Virgin Islands • United States Asia: • China • Hong Kong • Japan • Taiwan • Thailand Europe: • Albania • Andorra • Austria • Belarus • Belgium • Bosnia and Herzegovina • Bulgaria • Canary Islands • Croatia • Cyprus • Czech Republic • Estonia • Faroe Islands • Finland • Germany • Gibraltar • Greece • Guernsey • Hungary • Iceland • Ireland • Isle of Man • Italy • Latvia • Liechtenstein • Lithuania • Luxembourg • Malta • Moldova • Monaco • Montenegro • Netherlands • North Macedonia • Norway • Poland • Portugal • Romania • San Marino • Serbia • Slovakia • Slovenia • Spain • Sweden • Switzerland • Ukraine • United Kingdom • Vatican City Oceania: • American Samoa • Australia (Heard Island) • Cook Islands • Fiji • Guam • New Zealand • Norfolk Island • Palau • Papua New Guinea • Solomon Islands