LavniSend memories into the future.
Lavni keeps your messages, photos, videos and voices closed until the day you choose. Texts are encrypted with AES-256, files are kept in private storage, and the opening date is enforced by our servers.
Lavni lets you seal emotional messages, HD photos, videos, and voice archives into private or group time capsules unlocked only at your designated future date or via your secret PIN key.
The 5 pillars of Lavni innovation
Secret PIN & Early Consultation
For private, Wedding, Birthday and Personalised capsules, a 6-digit cryptographic PIN lets the creator unlock early and see every contribution before the official reveal date.
Contribution Limits & Automatic Sealing
Decide how many contributions your capsule can receive — up to 25, up to 100, or no limit at all for Wedding, Birthday and Personalised capsules. The capsule seals itself the moment the window closes or the last contribution arrives.
Invitation Card & Sealing Certificate
PDFs set in real typography, with an engraved frame and a struck seal. The card carries the QR code your guests need and stops working when the capsule seals; the certificate records the real sealing date and a verifiable reference, and only opens the capsule from its opening date.
Invite through the apps you already use
Sharing opens your device's own share sheet, so the invitation goes out through the apps already installed on your phone, in your own order. For anyone easier to reach in person, the same invitation exists as a QR code and a short code to read out.
AES-256 Encryption & GDPR Security
Texts encrypted with AES-256 before storage, files in private storage, data hosted in the European Union. No account, no ads, no trackers.
Private Capsules
Designed for personal letters, files, and deep archives. Sealed by a single creator and locked securely until the date arrives.
The lifecycle
- Compose & Upload — Write letters or upload photos, video, and audio depending on your plan.
- Set the Date — Choose the exact reveal date. It can be days, months, or decades from now.
- Generate Secret PIN — A private secret PIN is generated during sealing. Save it! It is the only way to unlock the capsule before the delivery date.
- Automatic or Early Reveal — The capsule automatically unlocks on the specified date. Alternatively, use the secret PIN to open it anytime.
Private plans
Capsule Simple Free
A simple text letter to the future. Time-locked and protected by a secret PIN.
Capsule Legacy €9.99
Up to 5 files, made for openings far ahead: pass messages and memories on to those who come after, in 10, 20 or 50 years.
Personalised capsule €24.99
Choose its goal, theme and colour, kept for the opening. Up to 5 files, open to your loved ones if you wish with no limit, and a secret code.
Collaboration
Built for group events, departures, birthdays, or weddings. Collect memories, messages, photos, and videos from friends and family.
The lifecycle
- Create & Share — Set up a collaboration capsule. Share the link or print the generated QR code. NO secret PIN is generated or required.
- Collect Contributions — Anyone with the link/QR code can instantly write a message, upload photos or record a video. No account or code is required to contribute.
- Automatic Sealing — Once the scheduled contribution period ends, the capsule seals automatically and begins counting down.
- Automatic Unveiling — At the opening date the capsule unlocks by itself. Everyone with the link reads the timeline — every message, photograph and video — and can download the book of memories: a bound PDF of the whole capsule, to print or to keep. It stays online for 30 days.
Collaboration plans
Collaboration Capsule S €5.99
Perfect for intimate circles. Collects up to 25 contributions, with photos and videos.
Collaboration Capsule L €12.99
For larger events. Collects up to 100 contributions, with full photo and video support.
The Gold Edition
For a wedding or a birthday, the capsule turns to gold: the documents you print, hand out and keep are made for the big day.
- Gilded certificate of sealing, gold frame and medallion
- Gilded invitation card with a QR code, then an A5 poster of your guests’ names
- Guest book: messages, photos, videos and voice messages
- Gilded guest book PDF and a ZIP archive to download
Wedding · €29.99 — Birthday · €19.99
Plans comparison
| Feature | Private | Collaborative |
|---|---|---|
| AES-256 Encryption | Yes, for texts | Yes, for texts |
| Early Access Method | Secret 6-digit override PIN | Secret code for Wedding, Birthday and Personalised; none for Collaboration S and L |
| Contribution limit | 1 unique creator | 25 or 100 contributions, or no fixed limit (Wedding, Birthday, Personalised) |
| Contribution Method | From creator's device | Link or QR code (no account req.) |
| After opening | 30 days, then deleted | 30 days, then deleted |
Three documents, three moments
A capsule produces printed objects, and each belongs to one moment in its life. One calls people in while it is still open. One attests that it was closed. The last is what was inside.
The invitation card
While a collaborative capsule is still gathering. It carries the QR code and the short code your guests need, the closing date and how many people have already contributed. Print it as many times as you need, one for each table. The day the capsule seals, the card stops working: its purpose is complete.
The certificate of sealing
Once the capsule is closed. It records the title, the true date it was sealed, the date it will open, and a unique reference. Until that date it opens nothing. From that date, its QR code becomes the way in — so the person you gave it to can read the message without ever having been sent a link.
The book of memories
The day a collaboration capsule opens. A bound PDF, cut from the same plate as the certificate: a sealed cover, the roll of everyone who wrote, then every contribution with its photograph printed at its own proportions, in the order they arrived.
Anyone can check it
The certificate's QR code leads to a public page on lavni.fr. While the capsule is sealed it confirms the document is genuine and says nothing else: no link, no names, no contents. From the opening date it also opens the capsule — which means anyone who can see the certificate, a photograph of it included, can then read what is inside.
Cryptographic Security & RLS
Every capsule's texts are encrypted with AES-256 before they are stored, and its files kept in private storage. Database security rules (RLS) block any direct access: a capsule can only be read through its link, on its date, or earlier with its secret code.
AES-256 Encryption
Titles, messages, names and e-mail addresses are encrypted with AES-256 before being stored; photos, videos and audio sit in encrypted private storage, served through links valid for a few minutes.
Strict Time-Locking
The opening date is checked by our servers, never by your phone: changing a device's clock opens nothing, and the app only delivers the content on its date or with the secret code.
Row-Level Database Security (RLS)
Supabase Postgres policies restrict database access at the row level, isolating all metadata and assets dynamically.
Secret-PIN Access Control
We only ever store a salted hash of your secret PIN, never the PIN itself. It only serves to unlock a capsule early — the scheduled reveal still happens automatically on its date even if the PIN is lost.
Your rights and your data
Data hosted in the European Union, never sold, no advertising. Minimum age: 15 in France, 13 in the United States. Personal data: privacy@lavni.fr.
A capsule is activated as soon as it is paid for, and the purchase is final: there is no 14-day withdrawal. If a capsule does not work as described, the legal guarantee of conformity applies.
Terms of Service · Privacy Policy
Frequently asked questions
How does Lavni privacy work?
Titles, messages, names and e-mail addresses are encrypted with AES-256 by our servers before being stored; photos, videos and audio sit in private storage. Database security rules (RLS) block any direct access, and the opening date is checked on the server. Your secret code is only kept as a salted hash: it opens the capsule early, it is not an encryption key.
Can I open my private capsule before the scheduled date?
Yes, with the 6-digit secret code shown when you seal it. Keep it safe: we only keep a hash of it, so nobody can find or reset it. Without it, the capsule still opens by itself on its date.
How do collaboration capsules work?
Perfect for group events (weddings, birthdays, departures), collaborative capsules let guests submit text, photos, and videos via a QR code or shared link without creating an account. Contributions seal automatically when the window ends, and the capsule unlocks for everyone on the release date.
Are media files uploaded by my guests secure?
Yes. Their messages are encrypted with AES-256, and their photos, videos and voice messages kept in private storage, served only through links valid for a few minutes. Nobody sees them before the opening, except the creator of a Wedding, Birthday or Personalised capsule with its secret code.
What is your refund and cancellation policy?
Every purchase is a one-off, with no subscription. A capsule is activated as soon as it is paid for, so the purchase is final: there is no 14-day withdrawal. If a capsule does not work as it should, the legal guarantee of conformity applies: write to support@lavni.fr. In-app purchases are handled by Apple or Google under their own terms.
What is the Personalised Capsule?
A capsule shaped around what it is for. You choose its goal (a memory, a letter to yourself, a project, a tribute, a challenge…), a theme and a colour, which greet whoever opens it. It holds up to 5 photos, videos or audio files, can be opened to your loved ones with no limit on contributions, and comes with a secret code. It has no guest book, poster or ZIP archive: those come with the Wedding and Birthday capsules.
I was given a printed certificate and no link. How do I read the message?
Scan the QR code on the certificate — it is the only thing you need. Before the opening date it shows that the capsule exists, that it is sealed, and how long is left. From the opening date the same code opens the capsule and shows you the message. Because of that, treat a certificate after its date the way you would treat a key: anyone who can see it, including in a photograph, can read what is inside.
What do I actually get when a collaboration capsule opens?
Two things. On screen, the timeline: every contribution in the order it arrived, with its photograph shown whole and its video played where it sits. And the book of memories — a bound PDF with a sealed cover, the roll of everyone who wrote, and each contribution printed with its photograph. It is made to be printed, and it is yours to keep whatever happens to the app.
I lost the link to my capsule. Is it gone?
No. The confirmation e-mail sent at sealing carries the link, which works on any device until the capsule is deleted, 30 days after it opens. The certificate carries the capsule's reference: from the opening date, its QR code leads to the capsule. Only the secret code cannot be recovered: we keep nothing but a hash of it.
What happens to a capsule after it opens?
It stays readable at its link for 30 days. An e-mail warns you 7 days and again 1 day before it is permanently deleted, contributions included. Download the memory book, the guest book or the ZIP archive before then: those files are yours and no longer depend on Lavni.
What is the Gold Edition?
It is the Wedding or Birthday capsule. Its certificate, invitation card, A5 poster and guest book are gilded, and guests can leave voice messages next to their words, photos and videos, all gathered in a guest book you can download as a PDF and a ZIP archive.
Can I add a voice message?
Yes. In a Wedding or Birthday capsule open to guests, everyone can record a voice message from the app or the website. Legacy, Wedding, Birthday and Personalised capsules also accept your own audio files.
Ready to seal a memory?
Create a private capsule or launch a group collaboration.