Sealday vs Capsula: A Ritual or an Encrypted Archive?

Choose Sealday for a personal reveal ritual; choose Capsula for an encrypted capsule file you store yourself, with opening dependent on its key-custody service. The deciding question is whether you want help setting a memory aside or an encrypted archive to manage. Sealday is not affiliated with Capsula.

A seal, encryption, and a backup do different jobs

A seal controls the experience of opening a memory. Encryption changes readable content into a form that requires decryption to read, as described in the NIST encryption glossary. A backup gives you another copy if the first disappears. None of these automatically supplies the other two. An animated lock does not establish encryption, and an encrypted file can still be lost.

What Sealday’s ritual actually gives you

Sealday lets you write a note, add photos, video, or audio, and choose a future opening date. Surprise hides the date on the waiting screen, Hint gives an approximate sense of time, and Exact shows the date and countdown. When the capsule is ready, you tap to break an animated seal before seeing the memory. These choices shape anticipation; they do not change the capsule into an encrypted archive. Sealday stores capsule content locally without capsule-level encryption and has no encrypted export. Use it for personal keepsakes, and keep passwords, financial details, and confidential records elsewhere.

What Capsula’s archive workflow adds

Capsula’s Google Play description says it encrypts photos, videos, letters, and voice memos on your device, then lets you retain the resulting archive locally or in storage you choose, such as Google Drive or iCloud. Its advertised opening flow uses a QR code or text secret after the scheduled date. This gives you a file to preserve outside the app, which Sealday does not offer. It also gives you something to look after: keep track of the archive’s location and protect your opening secret. Choosing personal cloud storage does not mean Capsula keeps a recovery copy of your memories.

Read Capsula’s security wording carefully

Capsula’s homepage advertises end-to-end encryption, while its Privacy Policy describes split custody and explicitly says the system is not zero-knowledge or a mathematically guaranteed time lock. Its Terms of Use say opening requires the scheduled time and the correct secret, with release dependent on its backend and supporting services. These details matter more than the lock graphic: Capsula offers encrypted content, but its opening schedule still depends on a service. Before using it for sensitive material, ask Capsula to clarify who can authorize key release and what recovery is possible. Do not interpret encryption as a guarantee of permanent availability.

Accounts and platforms affect the choice

Sealday’s capsule workflow does not require an account. Capsula’s Terms of Use describe signing in through Google or Apple, and its Privacy Policy describes processing account and service data even though capsule content stays in storage you control. Local content therefore should not be confused with an account-free service. Sealday has an Android app; Capsula has Google Play and US App Store listings, with the latter listing iPhone and iPad support. Check the listing for your device and country before choosing. Availability on both platforms alone does not establish that a capsule will transfer between them.

Plan for losing a phone before choosing an opening year

Sealday has no in-app capsule backup and restore or file export. Its Terms of Service warn that uninstalling, clearing app data, or losing the device can mean losing the memories, and Sealday cannot recover them. Keep separate originals of anything that matters. Capsula gives you an encrypted archive to copy, but its Terms of Use say the archive and opening secret are both necessary; losing either may make the contents permanently inaccessible. Before replacing a phone, confirm where the archive and secret are stored. Keep a second archive copy and store the secret securely rather than relying on memory.

Compare the payment models, not a fixed price

Sealday’s free tier allows one active capsule at a time; a capsule still counts while ready but unopened. Its optional monthly Premium subscription removes that limit and adds a golden opening ritual. Capsula sells one-time sealing credits called keys, with one credit used per capsule and no recurring subscription. Check the relevant store for current local pricing. Sealday’s introductory trial wording can appear before Google Play has confirmed an offer, so verify eligibility, trial length, renewal period, and total on Google Play’s purchase sheet. A Premium subscription does not add capsule encryption or a backup service to Sealday.

Choose around the responsibility you want to take on

Sealday fits a nonconfidential letter you want to revisit through a ceremony on your Android phone, especially if choosing how much of the countdown you see is part of the appeal. Capsula fits a memory collection you want stored as an encrypted file and are prepared to preserve alongside a separate opening secret. Its file-based approach is a meaningful advantage for keeping copies outside the app. If your requirement is a recoverable archive that opens independently of the provider, establish that recovery path before committing; neither a future date nor an encryption claim settles that requirement by itself.

Try the full experience with a disposable memory first

Use a short, nonconfidential note and an expendable attachment to check the actual saving and opening process before sealing years of memories. In Sealday, do not rely on an unfinished draft surviving navigation away from the creation screen; keep a separate copy of a long letter until it is sealed. In Capsula, confirm that you can locate the saved archive and understand how to preserve the opening secret. If transferring between devices matters, ask Capsula for the supported transfer procedure.