Coming soon to iPhone

What Sealday does

Sealday turns a time capsule into a small ritual with a payoff. You seal predictions and personal material, a public time beacon holds the key until the date, and on open day you grade your guesses and share the result. Everything runs on your iPhone with no account.

Coming soon to iPhone

What are the main features?

The time lock keeps a capsule closed. Predictions are the content that gets graded. Letters, photos and voice are the personal part. Tables make it a group game, friend capsules send one to another person, and backup and restore keeps your capsules safe.

How do the pieces fit together?

You choose a date and write guesses. You add a letter, photos or a voice note if you want. You hold a wax seal for about two and a half seconds, and the capsule is locked. When the date arrives you open it, grade each guess, and post the cards.

The free version covers the whole loop. Plus raises limits on photos, voice length, Table size and the number of capsules waiting at once.

Frequently asked questions

Does everything work offline?

Sealing works offline. Opening needs one small request to a public drand relay for that date's key, so you need a connection for a moment on open day.

Which languages does Sealday speak?

English and Russian.

Is anything in Sealday behind a paywall that I need to open a capsule?

No. Opening, grading, share cards, backup, export and deletion are never behind payment. Plus raises limits on capsules, photos, voice length and Table size.

Can I use Sealday without an account?

Yes. There is no account. Capsules live on your iPhone and in your own backups.

Keep exploring

Seal your first capsule in about a minute

  • Predictions, a letter, photos and a voice note
  • Locked until the date by a public time beacon
  • No account, no ads, no analytics

Coming soon to iPhone