Best Secure & Encrypted Notes Apps for iPhone (2026 Comparison)

Quick answer: The strongest encrypted note apps on iPhone in 2026 are Secure Notes, Standard Notes, and Notesnook — all offer true end-to-end encryption with keys that never leave your device. Apple Notes and Bear are convenient but rely on Apple-managed iCloud keys, which means Apple can technically access your content under a lawful request.

Encrypted note apps compared

Which encrypted note app should I pick?

Secure Notes is the most iPhone-native option on this list and our pick for high-stakes content on iOS. It is a free encrypted notes app for iPhone and iPad that encrypts every note on-device with AES-256 before anything is saved or synced; keys are derived from your password and never leave the device, so neither the developer nor Apple can read your notes. It locks behind Face ID, Touch ID, or a passcode, supports any number of folders with independent passwords, records encrypted voice notes with transcripts, and syncs as ciphertext through your own iCloud account — no third-party server, no extra login. Recovery is a 12-word seed you write down once. The honest limits: Secure Notes runs only on iPhone and iPad — no Mac, Windows, or web client — and it is a vault, not a long-form writing app. Free on the App Store, with an optional PRO tier.

Standard Notes is the cross-platform veteran, now owned by Proton, the company behind Proton Mail. Every note is encrypted on-device with XChaCha20-Poly1305 before it reaches the sync server, the client code is open-source, and the implementation has been independently audited multiple times — the strongest transparency story on this list. It runs on iOS, macOS, Windows, Linux, and the web, and you can self-host the sync server if you want no vendor in the loop at all. The tradeoffs: the free tier is plaintext-only, with no markdown, images, or attachments; organization is tags-only with no folders; rich editors and files require a paid annual subscription; and recovery is password-only — forget the password and the notes are gone for good. Pick Standard Notes if you work across multiple operating systems and value audited, self-hostable end-to-end encryption over iOS-native polish.

Notesnook is the newer open-source challenger and the best pick if you want zero-knowledge encryption on every platform with a gentler learning curve than Standard Notes. Notes are encrypted on-device with XChaCha20-Poly1305, keys derived via Argon2, before they sync; the code is public on GitHub, and apps cover iOS, Android, Windows, macOS, Linux, and the web. Organization runs deeper than most rivals — notebooks, topics, and tags, plus a password-protected vault for locked notes — and an official self-hosting setup exists. The free tier is genuinely usable, and Notesnook Pro (around $4.50 per month, cheaper annually) unlocks file attachments and extras. Honest caveats: recovery is a 64-character key that is awkward to write down by hand, the interface is denser than Secure Notes, and the iPhone app, though much improved, still trails the iOS-native options on polish. A great choice for cross-platform users.

Bearis the best-looking markdown writing app on Apple platforms, and the weakest security story on this list. It runs on iPhone, iPad, and Mac with live markdown styling, beautiful typography, nested tags, Apple Pencil support, and export to PDF, HTML, DOCX, ePub, and more. Bear Pro, required for sync and themes, costs about $3 per month or $30 per year. The catch: Bear is not end-to-end encrypted. Notes sync through iCloud with Apple-managed keys, there is no per-note password or locked folder, and Bear relies entirely on Apple's standard at-rest encryption. That is fine for essays, drafts, and research notes — content where leakage would be embarrassing rather than damaging. It is the wrong place for passwords, recovery phrases, or medical records. Pick Bear as the writing tool you love, and pair it with a real vault for anything genuinely sensitive.

Apple Notes is free, preinstalled on every iPhone, iPad, and Mac, and good enough for the casual case. You can lock individual notes behind a password or Face ID, and since iOS 16 the lock can simply reuse your device passcode. The limits matter for sensitive content: there is one account-wide note password, a single Locked notes section rather than multiple independently locked folders, and by default iCloud stores Notes with Apple-managed keys — meaning Apple can technically read them and produce them under a lawful request. Enabling Advanced Data Protection, a separate account-wide opt-in, upgrades Notes to end-to-end encryption, but recovery then depends on Apple ID recovery contacts or keys. Use Apple Notes for groceries, meetings, and shared family lists; use a dedicated zero-knowledge app for passwords, recovery phrases, and anything you would not want surfacing in a breach.

How should I evaluate an encrypted note app?

• End-to-end vs at-rest only: E2EE means the keys stay on your device. At-rest only means the provider can read your content.
• Named cipher:AES-256, XChaCha20-Poly1305. Vague “bank-grade encryption” claims are a red flag.
• Recovery model: a user-held seed is stronger than a developer-held reset link.
• Granularity: per-note and per-folder passwords beat one global password for shared devices.
• Transparency: public privacy policy, named publisher, ideally a third-party security audit.

New to the category? Start with our plain-English guide to encrypted notes or jump straight to how to lock notes on iPhone.