Every journal app calls itself private. NotePrivate put ten of them side by side on the three things that decide it: whether entries are encrypted with a key only you hold, where the readable copy lives, and what you pay. NotePrivate is one of the ten, and its gaps are listed with everyone else's.
Prices read from each vendor's own site on 27 September 2026 · Named products are market context, not endorsements
The best encrypted journal app for most people who write on a phone is Day One: its pricing page lists end-to-end encryption on every plan, including the free Basic plan, and it has the prompts, streaks and photo entries a journal habit runs on. If every device you own is made by Apple, Apple Journal is end-to-end encrypted in iCloud under Apple's standard data protection and costs nothing extra. If you want free and open source, Notesnook and Standard Notes both encrypt end to end on their free tiers. If you journal on a Mac or Windows PC and want the entries encrypted on your own disk with no account at all, that is the job NotePrivate is built for. NotePrivate is planned at $59 a year, is not on sale yet, and has no phone app yet.
Sources for this encrypted journal app summary: dayoneapp.com/pricing, Apple's iCloud data security overview (support.apple.com/102651), notesnook.com/pricing and standardnotes.com/plans, all read on 27 September 2026. The NotePrivate price is planned, not live.
Ten journal and diary apps people weigh when privacy is the reason they are shopping, NotePrivate included. The encryption column answers one question only: can the company that runs the sync server read your entries?
| App | End-to-end encrypted | Where entries are stored | Platforms | Price, read 27 Sep 2026 |
|---|---|---|---|---|
| NotePrivate | YesOn from the first entry | Encrypted vault on your own disk; sync optional through a cloud folder you already use | macOS, Windows | $59/year planned, not on sale |
| Day One | YesKey saved to iCloud by default | Day One Sync | iPhone, iPad, Mac, Windows, Apple Watch, Android, web | Basic free (1 device; Windows currently exempt), Silver $49.99/yr, Gold $74.99/yr |
| Apple Journal | YesStandard iCloud protection | iCloud | Apple devices only | Comes with the iPhone |
| Standard Notes | Yes | Standard Notes sync account, with an offline copy | Web, desktop, mobile | Free plain text; Daily Notebooks on Productivity $90/yr; Professional $120/yr |
| Notesnook | YesSame privacy on free and paid | Notesnook sync | Windows, macOS, Linux, Android, iOS, web | Free; Essential $19.99/yr; Pro $69.99/yr |
| Joplin | PartialOff until you enable it | Sync target you choose, Joplin Cloud or your own | Windows, macOS, Linux, Android, iOS | App free; Joplin Cloud Basic 28.69 euros/yr |
| Obsidian | PartialSync only; local vault is plain Markdown | Markdown files on your disk | Windows, macOS, Linux, Android, iOS | Free; Sync $4/month billed yearly |
| Penzu | PartialEncryption locking on paid plans | Penzu's servers | Web, iOS, Android | Basic free; Pro $19.99/yr; Pro+ $49.99/yr or $199.99 lifetime |
| Diarium | Not describedPassword, PIN or biometric lock | On your device; optional sync via your own cloud | Windows, Android, iPhone, iPad, Mac | Free on Android, iPhone, iPad and Mac; Windows is paid and includes Pro. Pro is a one-time purchase per platform. |
| DeepJournal | PartialSensitive fields only | Encrypted local database, synced | macOS, Windows | Free tier; paid upgrade |
Sources for this encrypted journal app table, all read 27 September 2026: dayoneapp.com/pricing, Day One's end-to-end encryption FAQ and Windows getting started guide; support.apple.com/102651; standardnotes.com/plans; notesnook.com/pricing; joplinapp.org/plans and Joplin's E2EE help page; obsidian.md/pricing; penzu.com/pro; diariumapp.com; deepjournal.app/pricing and DeepJournal's own July 2026 comparison. Penzu lists Pro at $19.99 a year. The Diarium Pro price was not shown on its page, so it is not listed. The NotePrivate price is planned, not live.
Roundups rank journal apps by feature count. This NotePrivate comparison goes app by app on the catch you only find in the help centre, with the source named in the same card.
Day One has the prompts, streaks, On This Day memories, templates and photo entries, and its pricing page lists end-to-end encryption on Basic, Silver and Gold. The catches are in the details. Basic is limited to one device and one photo per entry, though Day One currently says its Windows app is free and does not count against the device limit. Day One's own encryption FAQ says the key is stored in iCloud by default, and you can switch that off and keep it only in the keychain. Day One also says the security firm nVisium reviewed its end-to-end encryption and found four medium and three low severity risks. If you write on your phone, Day One beats NotePrivate today.
Apple's iCloud data security overview lists Journal data as end-to-end encrypted even under standard data protection, with the keys on your trusted devices rather than with Apple. That is a stronger default than Apple Notes, which is only end-to-end encrypted once you turn on Advanced Data Protection. The catch is reach: there is no Windows or Android version, so a PC at work or an Android phone ends the story. For an all-Apple journal written on the iPhone, Apple Journal is the better pick than NotePrivate right now.
Standard Notes encrypts every note with XChaCha20-Poly1305 according to its plans page, and the free plan includes end-to-end encryption, offline access, per-note password protection and daily encrypted email backups. Daily Notebooks, the feature built for a dated journal, sits on Productivity at $90 a year, and the free tier is plain text only. Standard Notes is open source with published third-party audits; NotePrivate is closed source with no published audit. The Standard Notes versus NotePrivate comparison covers the plan split in detail.
Notesnook's pricing page says free or pro, you get the same level of privacy, so the free tier is end-to-end encrypted too. Paid plans are Essential at $19.99 a year and Pro at $69.99 a year, and the free tier has unlimited notes with a 50MB monthly allowance for attachments. Notesnook is a notes app, so a journal is notebooks, tags and reminders you set up yourself rather than a timeline with prompts. If the budget is zero and you need a phone app, Notesnook is a better answer than NotePrivate.
Joplin's help page says end-to-end encryption works on all its apps but has to be enabled manually on one device first, then synced to the rest, and that the master key password cannot be recovered. That flexibility is the point of Joplin, and it also means anything synced before you flip the switch sits on that sync target unencrypted until the full re-sync finishes. The app is free and Joplin Cloud Basic is 28.69 euros a year. NotePrivate has no switch to forget: the vault is encrypted from the first entry. The Joplin alternatives with encryption on by default page compares Joplin with Notesnook, Standard Notes and NotePrivate.
Obsidian is free, and its pricing page describes Sync at $4 a month billed yearly with AES-256 end-to-end encryption. The vault on your computer, though, is a folder of plain Markdown files, so anyone sitting at your open laptop can read every entry, and so can any community plugin you install. Plenty of people journal in Obsidian daily notes happily. If the local copy is the part that worries you, the encrypted Obsidian alternative page shows where NotePrivate closes that gap.
Penzu's Pro page lists encryption locking on Pro at $19.99 a year and military grade encryption locking on Pro+ at $49.99 a year or $199.99 once for lifetime. What Penzu's public pages do not describe is who holds the key, and DeepJournal's July 2026 comparison notes that encryption locked entries cannot be searched until they are opened again. Treat the free Basic plan as a password protected web diary rather than an encrypted journal. NotePrivate is the opposite shape: no browser, no server copy, desktop only.
Diarium needs no account, runs on Windows, Android, iPhone, iPad and Mac, and syncs through OneDrive, Google Drive, iCloud, Dropbox or WebDAV, per diariumapp.com. Its homepage describes protecting the journal with a password, PIN or biometrics, including Windows Hello, and does not describe encrypting the entries themselves. That is a lock on the app, which stops a sibling and not someone holding a copy of the file. On features Diarium is ahead of NotePrivate; on documented encryption it is behind.
DeepJournal is the app on this list closest in shape to NotePrivate: a desktop journal for macOS and Windows. Its own comparison says the local database is encrypted while locked, selected sensitive fields are end-to-end encrypted before sync, and dates, word counts and relationships can stay visible. Its reason to exist is AI analysis inside confidential computing enclaves. If you want AI reading your journal, look there; NotePrivate has no AI features at all.
NotePrivate stores the journal as an encrypted vault on your Mac or Windows PC, with the key derived from a password that never leaves the machine. It opens and searches offline, needs no account, locks itself on sleep, and a single entry can stay locked after the vault is open until the password is entered again. Sync is optional and travels as ciphertext through a cloud folder you already pay for. The NotePrivate journal and diary app page covers setup. The catches: no phone app yet, no prompts or streaks, closed source, no published audit, and not on sale.
Every encrypted journal app detail above comes from the vendor pages named in the table sources, read 27 September 2026. Features and prices change, so check the vendor's site before moving years of entries.
A padlock icon proves nothing. These five questions are the ones NotePrivate would ask of any journal app, including itself, before trusting it with the file you would least want read.
Sources: Day One export guide, Day One pricing page and end-to-end encryption FAQ, joplinapp.org E2EE help, obsidian.md/pricing, standardnotes.com/plans, and DeepJournal's July 2026 comparison, read 27 September 2026, except the Day One export guide, checked 28 September 2026. The vault password versus a lock on one note page explains why an app lock and disk encryption are not the same as an encrypted journal.
The right encrypted journal app mostly depends on where you write. Here is the NotePrivate shortlist per device, using only the platform lists and prices in the comparison table above this section, repeated here so each answer stands on its own.
Day One or Apple Journal. Apple Journal is end-to-end encrypted by default and comes with the phone; Day One adds prompts, templates and an Android and web version, with end-to-end encryption on its free Basic plan and multi-device sync on Silver at $49.99 a year. NotePrivate has no iPhone app yet.
Day One, Notesnook, Standard Notes or Joplin, all of which ship Android apps. Notesnook is the free pick with encryption on by default; Joplin is free too, once you enable encryption yourself. NotePrivate has no Android app.
Day One if you want a journal with prompts, photos and a phone app alongside its Windows app. NotePrivate if you want the journal encrypted on the PC itself with no account. Notesnook, Standard Notes and Joplin also run on Windows and phones. Diarium is a rich Windows diary, but diariumapp.com describes a lock rather than encryption. The encrypted notes app for Windows page covers what BitLocker does and does not cover.
Day One if you also write on an iPhone, and NotePrivate if the Mac is where the journal lives and you want the vault encrypted on its disk, with Touch ID so you are not retyping the password. DeepJournal is the Mac and Windows option if you want AI reading your entries.
Notesnook free, Standard Notes free, Joplin, or Day One Basic on a single device. Each costs $0 and encrypts end to end, with Joplin needing it switched on. NotePrivate is not free: it is planned at $59 a year with every feature included.
Pay for the thing you would actually use. Day One Silver at $49.99 a year buys sync across devices and media; Standard Notes Productivity at $90 a year buys Daily Notebooks; NotePrivate at a planned $59 a year buys an encrypted local vault with no account. If a free tier already does your job, keep your money.
These four questions show up on the search results page for the best encrypted journal app. Straight answers, with NotePrivate named where it fits and named out where it does not.
Day One, Diarium, Notesnook, Penzu and NotePrivate can all be locked, but a lock and encryption are different things. Day One and Notesnook pair the lock with end-to-end encryption, Penzu adds encryption locking on its paid plans, and Diarium's homepage describes a password, PIN or biometric lock without describing encrypted entries. NotePrivate locks an encrypted vault on your Mac or Windows PC and can keep a single entry locked after the vault is open.
The best diary app with a password is one where the password sits on top of real encryption with a key the vendor does not hold, not just a screen in front of readable files. Day One, Standard Notes and Notesnook work that way on phones and computers. NotePrivate works that way on Mac and Windows, with the key derived from a password that never leaves your machine and no reset link, which also means a forgotten password is a lost diary.
For most people it is Day One, because it has the prompts, streaks and photo entries that keep a journal going, and end-to-end encryption on every plan including the free one. Apple Journal is the free, encrypted choice on an iPhone. NotePrivate is the pick when you journal on a Mac or Windows PC and your first requirement is that the entries stay encrypted on your own disk with no account.
Standard Notes is the best documented, with open source code and published third-party audits, and Notesnook is the best free option across every platform. NotePrivate is an encrypted notes app for Mac and Windows that keeps the vault on your own disk rather than in a sync account, with every note type included at a planned $59 a year. It is closed source, has no published audit and is not on sale yet.
Already sure a desktop journal is what you want? The encrypted diary for Mac and Windows page walks through setting one up in NotePrivate, and the NotePrivate homepage covers the full feature list. For everyday notes rather than a diary, the NotePrivate comparison of encrypted note taking apps applies the same key and storage tests to seven notes apps.
A comparison written by one of the apps in it should say where that app loses. These are the NotePrivate gaps, stated plainly.
NotePrivate runs on macOS and Windows, and the iPhone app is still in progress. Most journaling happens on a phone in bed, and if that is you, Day One or Apple Journal is the answer until NotePrivate ships there.
NotePrivate has no writing prompts, no streak counter and no On This Day resurfacing. Day One has all three on its free Basic plan, per its pricing page.
NotePrivate is closed source with no published third-party audit. Standard Notes publishes its source and its audits, and Notesnook publishes its source, so if verifiable code is the bar, NotePrivate does not clear it.
Yes, for journals created since Day One version 4.2, where end-to-end encryption is on by default, and Day One's pricing page lists it on the free Basic plan as well as Silver and Gold. Day One stores your encryption key in iCloud by default, which you can turn off, and journals created before end-to-end encryption cannot be converted, so Day One suggests making a new journal and copying the entries across.
Yes. Apple's iCloud data security overview lists Journal data as end-to-end encrypted under standard data protection, with the keys held on your trusted devices, so you do not need to turn on Advanced Data Protection for it. Apple Journal has no Windows or Android version, which is where it stops being an option.
Yes, several. Notesnook, Standard Notes and Day One Basic are end-to-end encrypted at $0, and Joplin is free and can be end-to-end encrypted once you enable it. Day One Basic is limited to one device and Standard Notes free is plain text only. NotePrivate is not free: it is planned at $59 a year and is not on sale yet.
Day One, Notesnook, Standard Notes and Joplin run on Windows and phones with end-to-end encryption. Day One has a Windows app, plus apps for iPhone and Android. NotePrivate runs on Windows and Mac only for now, with the iPhone app still in progress, so it is the right pick only if the computer is where you write.
Only against someone who steals a powered-off machine. Once you sign in, the disk is open for your session, and a journal app that stores entries as readable files is open to anyone using that session. An encrypted journal app like NotePrivate keeps the entries encrypted even while you are signed in, until you open the vault itself.
If the encryption is real, the entries are gone. Joplin says its master key password cannot be recovered, Day One says an encrypted journal cannot be decrypted without the key, and NotePrivate has no reset link because no copy of your key exists on a server. Write the password down somewhere safe before the journal fills up.
No. NotePrivate is waitlist only. It is planned at $59 a year with every feature included, on macOS and Windows, and joining the waitlist is the one thing you can do today.
NotePrivate keeps your journal encrypted on your Mac or Windows PC with a key only you hold. It is not on sale yet. Join the waitlist and you will hear the day it opens.
NotePrivate is not on sale yet. Leave your email and we will write to you the day it opens.
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