A real writing space
Bold, italics, lists and links — proper rich-text entries with search across your whole journal, all indexed locally.
Use case
Write like no one will ever read it. Because no one can.
Honest journaling needs certainty that it stays yours. Sealby is a diary with real cryptography: rich-text entries encrypted on your device, inside a vault that doesn’t even have to visibly exist.
What is the most private journaling app for iPhone?
The most private journal is one that never leaves your device readable. Sealby encrypts rich-text entries with AES-256 before they touch storage, requires no account, and keeps your journal inside a deniable vault — so it can’t be stumbled onto, synced out, or proven to exist.
No one stumbles onto it
A journal in a notes app is one scroll away from being read. A journal in a hidden vault is invisible — even to someone holding your unlocked phone.
Not a service, a vault
Journaling services hold your inner life on their servers. Sealby holds nothing: no account, no server, no way for anyone — including us — to read a word.
Common questions
Is this more private than Apple’s Journal app or Day One?
Journal services and synced apps keep readable data or keys within reach of the provider or your cloud account. Sealby is local-first with no account; entries are AES-256-encrypted on-device, and with Premium the only thing in iCloud is an unreadable blob.
Can I add photos to journal entries?
Yes — keep photos, clips and files in the same vault as your entries, all encrypted the same way, organised with folders and tags.
Related: Notes & documents · Private photos · Hidden vaults
Your vault is waiting.
Download Sealby and lock down what matters — in under a minute, with no account to create.
Download on the App Store
iPhone & iPad · iOS 17+ · Free