One capsule
$3/ capsule
One-time payment · Yours forever
Includes
- Two QR codes: fill + key
- Live capsule status page
- End-to-end encryption
- Optional password protection
✦ A digital time machine
Turn filesInto memorable keepsakes
Take a pause and choose only what truly defines life right now. Take it out of everyday clutter and keep it in a peaceful place. With Capsoul, you can treasure those few unrepeatable moments so that, when the day comes, revisiting them feels like traveling through time.
No subscription · End-to-end encryption · Double custody
Sealed · June 2035 · Contributors +42
- 100%
- End-to-end encrypted
- $0/mo
- No subscription. You only pay once for sealing
- Keys
- That's all we store. Your data stays with you
- 100%
- Private and personal, or shared with your loved ones
How it works
We seal your data into a single file
That file is a capsule and can only be opened with your key on the set date. Until then, it cannot be viewed or modified.
Create your capsule
Add the photos, videos, and letters you want to treasure, choose your opening date, and seal the capsule with your key.
Treasure it
Capsoul saves the encrypted capsule file to your device. You can keep it wherever you like. It can only be opened with the key linked to your account on the unlocking date.
Monitor it
Add widgets, stickers, and notes from the Capsoul app. You can also verify the status of your sealed capsule at any time.
Open it
Use your opening key when the countdown ends to take an unforgettable journey back in time.
Privacy & security
We hold the lock, never the memories
Capsoul uses double custody: you keep the encrypted capsule file in your personal cloud or device, while we securely hold only the time-locked cryptographic key.
- The app encrypts and seals the capsule directly on your device. Your files never touch our servers.
- You store the encrypted file in Google Drive, iCloud or your personal storage. Without the time-key, it cannot be read.
- If Capsoul ever closes, we will email you the cryptographic keys and clear instructions to decrypt and open your capsule independently.
Your memories always stay in your control, even if Capsoul is no longer here.
Simple
$3 per capsule. No subscriptions.
Buy a capsule once and it is yours forever. We only manage the keys so you get the best experience.
Join the waitlist
FAQ
Questions, answered
Everything you might wonder before sealing your first digital time capsule.
What is Capsoul and why is it the best digital time capsule app?
Capsoul is the leading digital time capsule application designed to preserve memories, photos, videos, audio, and letters for the future. Unlike traditional cloud drives or social media, Capsoul features zero-knowledge end-to-end encryption, a unique double-custody security model (you own the encrypted capsule file; Capsoul protects the time-locked key), and a fair one-time payment of $3 with no recurring subscriptions. With custom unlock dates, QR-based access, and client-side encryption on your mobile device, Capsoul is the most secure, private, and intuitive way to send unforgettable memories to your future self or loved ones.
What are the two QR codes for?
One QR is the fill code, used to add content and to view the capsule’s status countdown. The other is the key code, the single private key used to decrypt and open the capsule when its target date arrives.
How much does Capsoul cost?
Capsoul costs a one-time payment of $3 per capsule — no subscriptions and no recurring fees. Once sealed, your capsule is yours forever.
How is my content protected?
Your files are never uploaded to our servers. They are encrypted and sealed directly inside the mobile app on your device. We only store the time-locked cryptographic key in our database, while the encrypted capsule file stays 100% with you under double custody.
Who can add memories to my capsule?
You choose. Keep your capsule strictly private for personal reflection, or share the fill QR code with family and close friends, optionally protected with a password.
What happens after a capsule is sealed?
The fill QR turns into a live status page showing the remaining countdown, the title and details of the capsule, so you can follow the time remaining until unlocking.
What if I lose the key QR?
The key QR is the only way to decrypt a capsule. Because we never store your content unencrypted, keep the key safe — treat it like the key to a real vault.
★ Early access · 50% OFF
Join the waitlist & get 50% off all capsules
Capsoul is launching soon. Join the waitlist today to secure an exclusive 50% discount on all digital time capsules you ever create.
No spam, ever. Just your discount and launch notification.
Start a capsule your future self will thank you for
Seal a birthday, a graduation, a wedding, personal milestones or a whole year. Preserve it today, reopen it when it matters most.
Join the waitlistOne-time payment per capsule · End-to-end encrypted · Double custody