Your phone is unlocked on the kitchen table. Someone picks it up to check the time, or to show you a photo, or just because it was there. For most apps that is fine. For a journal, it is the whole problem.
That is why so many people search for a journal app with a lock. But “has a lock” can mean very different things. Some locks keep out anyone who borrows your phone. Others open for anyone who knows your phone’s passcode, which is often the exact person you were worried about. This guide explains the difference and what to look for.
Three kinds of journal lock
A lock on the whole phone. Your lock screen protects everything at once. It does nothing once the phone is unlocked and in someone else’s hands.
A system app lock. On iPhone you can make any app require Face ID, Touch ID or your passcode: touch and hold the app, then tap Require Face ID. Apple says a locked app’s information also stays out of notification previews, search and Siri suggestions. That is genuinely useful. The catch is that it opens with your phone’s passcode, so anyone who knows that passcode can open it. Apple’s own Journal app works the same way: its lock uses your device passcode, Face ID or Touch ID.
A journal with its own PIN. Some journal apps let you set a PIN that belongs only to the journal, separate from the phone’s passcode, with Face ID or a fingerprint as a shortcut. Someone who knows how to unlock your phone still does not know how to open your journal.
None of these is wrong. Which one you need depends on who you are protecting your journal from: a stranger who finds your phone, or someone you live with.
What to check before you trust a journal lock
Is the PIN separate from your phone’s passcode?
If the journal opens with the same code that unlocks your phone, everyone who knows that code can read it. A separate journal PIN closes that gap.
Does it lock again on its own?
Open the journal, switch to another app, then come back. If it opens without asking again, someone can pick up your phone mid-entry and keep reading.
Are the entries encrypted, or just hidden behind a screen?
A lock screen stops someone tapping into the app. Encryption protects the entries themselves. Look for wording like “encrypted on your device” in the description or privacy policy.
Can the entries be read somewhere else?
If the journal syncs to a website or another device, the lock on your phone is only one door. A journal that stays on your phone has only one place to protect.
What happens if you forget the PIN?
A good lock has a recovery path that only you can use. Check this before you write a hundred entries, not after.
If a partner or family member regularly goes through your phone or demands your passcodes, a journal lock can help with privacy, but it is not a safety plan. In the US, the National Domestic Violence Hotline is free and confidential: call 1-800-799-7233 or visit thehotline.org. If you are in immediate danger, call 911.
Where Yasura fits
I build Yasura, so read this part with that in mind. Yasura is a journal app for iPhone and Android with its own lock, built for the person holding your phone, not only for strangers on the internet.
| System app lock | Yasura | |
|---|---|---|
| Opens with your phone passcode | Yes | No, it has its own PIN |
| Face ID or fingerprint | Yes | Yes, as a shortcut to your PIN |
| Entries encrypted on device | Depends on the app | Yes |
| Account or cloud copy | Depends on the app | None, 100% offline |
| Forgot-PIN recovery | Your phone passcode | A security question you set |
When you create your PIN, you also set a security question, so you can get back in if you forget it. On iPhone you can add Face ID, and on Android a fingerprint or face unlock. Your journal is encrypted on your device and never synced anywhere, and there is no account and no subscription. With the one-time Lifetime Unlock you also get Decoy Mode, which keeps your entries protected if someone else picks up your phone.
And honestly, a paper notebook with a real lock and a good hiding place has worked for centuries. If that is what you trust, it is a fine choice.
Common questions
Can I lock my journal with Face ID?
Yes. In Yasura you set a PIN first, then you can turn on Face ID on iPhone, or fingerprint or face unlock on Android, to open it faster.
Does Yasura use my phone’s passcode?
No. Yasura has its own PIN, separate from the code that unlocks your phone.
What if I forget my PIN?
When you create the PIN, you choose a security question and answer. You use that to recover access.
Is the journal free?
Yes. The PIN lock and biometrics come with the free app. An optional one-time Lifetime Unlock adds Decoy Mode, extra themes, PDF export and a daily reminder. There is no subscription.
Sources: Apple, “Lock or hide an app on iPhone”; MacRumors, “How to Lock Your iPhone Journal”; National Domestic Violence Hotline.
Try Yasura
Free to download. Its own PIN, Face ID or fingerprint, encrypted on your device. No account, no cloud, no subscription.