Your Last Words,
Delivered
When It
Matters Most
MissCaps is a privacy-first missed contact switch that automatically delivers your encrypted messages and memories to loved ones if you go missing — powered by AES-256 end-to-end encryption and Solana blockchain proof.
"If you're reading this, know that every moment with you was precious. I want you to…"
Simple by Design
How MissCaps Works
Three simple steps stand between your most important words and the people who need them most.
Create Your Capsule
Write your messages, upload photos and videos. Add the recipients who should receive them. Everything is encrypted on your device before upload — we never see your content.
Stay Active
Check in daily by opening the app, reading an article, or tapping the activity button. Set your own "miss days" — from 7 to custom. As long as you're active, capsules stay sealed.
Auto-Delivered
If you miss too many days, MissCaps sends a secure delivery link to each recipient. They verify their identity, and the capsule content unlocks — with blockchain proof it was never tampered with.
Real App
See It In Action
Capsule List
Daily Check-in
Local Encryption
Blockchain Proof
Recipient Settings
Privacy Settings
Your Privacy Is Mathematically Guaranteed
We store ciphertext. We can't read your capsules
— and neither can anyone else.
MissCaps isn't just a time capsule — it's a mathematically verifiable, privacy-first system that works even when you can't.
End-to-End Encryption
Content is encrypted on your device with AES-256-GCM + RSA-2048 before upload. Your 6-digit privacy PIN derives the key via PBKDF2 (100k iterations). Forget your PIN? Use one of your 8 one-time recovery codes to reset it — no data lost.
Zero-Knowledge Server
Your privacy PIN never leaves your device. The server stores only the encrypted private key. Without your PIN, the ciphertext is mathematically meaningless — even to us.
Missed Contact Switch
Set your miss days (as few as 3). If you stop checking in past that threshold, MissCaps automatically delivers all your active capsules to their recipients — no manual action required.
Blockchain Proof
Every capsule's SHA-256 fingerprint is recorded on the Solana blockchain. Recipients can independently verify the content was never altered — tamper-proof and immutable.
Secondary Confirmer
Optionally appoint a trusted person to confirm before any capsule is delivered. They can verify you're truly missing or cancel a false alert — giving you a human safety net.
Multilingual & Cross-Platform
Available in 6 languages: English, 简体中文, 繁體中文, Español, Deutsch, and 日本語. Native iOS and Android apps, with recipient delivery pages working on any browser — no app needed.
Available Now
Get MissCaps Today
Available on iOS and Android. Or install directly from an APK. Free to start — no credit card required.
Requires iOS 14+ or Android 6.0+
What's New
Latest Announcements
MissCaps Beta Launch — Your Digital Legacy, Secured
We're thrilled to announce the beta launch of MissCaps, a privacy-first missed contact switch app that helps you leave your most important messages for the people who matter most — protected by zero-knowledge end-to-end encryption and Solana blockchain proof.
How End-to-End Encryption Protects Your Capsules
A plain-language walkthrough of the cryptographic model behind MissCaps — from AES-256-GCM content encryption to RSA-2048 key wrapping and PBKDF2 answer derivation.