How to keep a journal no one else can read (even on a shared phone)
The phone gets passed around. The family shares an Apple ID. Here is how to keep a diary that stays yours anyway, on iPhone and Android.
the short version
A private journal is less about encryption than about who picks up your phone. Here's how to keep one that stays yours, even when the phone doesn't.
Kindredly is an anonymous penpal app that matches strangers by how they write.
Most advice about private journals is about encryption: where the files live, who holds the keys. That matters. But if you share a phone with a sibling, hand it to your mum to look at a photo, or have a partner who knows your passcode, the person you're worried about isn't a hacker. It's someone sitting next to you.
So this is about the ordinary kind of privacy: a diary that stays yours when the phone doesn't.
First, find out where your journal actually goes
Before locking anything, check whether your entries leave the phone.
- A shared Apple ID is the big one. If the family uses one Apple ID, anything that syncs through iCloud (Notes, Journal, many diary apps) can appear on every device signed into it. Your iPad might be private; the shared iPad in the kitchen isn't.
- Look at the app's sync setting. Many journal apps back up to iCloud or Google Drive by default. That's good if the account is only yours. It's a leak if it isn't.
- An app that keeps entries on the phone only has nothing to sync. The trade-off: if you lose the phone without a backup, the diary goes with it.
Lock the app, not just the phone
A phone passcode keeps strangers out. It does nothing about the person you just handed your unlocked phone to.
On iPhone (iOS 18 and later): touch and hold the journal app's icon, then choose Require Face ID (or Touch ID, or your passcode). From then on the app asks again every time it opens, even on an unlocked phone. Choose Hide and Require Face ID and the icon also leaves the Home Screen and moves to a hidden folder at the bottom of the App Library.
Apple's own Journal app has its own lock too: in Settings, open Journal and turn on Lock Journal.
Apple Notes can lock individual notes with your device passcode. Handy for one page; clumsy for a diary.
On Android 15 and later: Private space (in Settings, under Security & privacy) keeps apps in a separate, locked area that doesn't show in the usual app list. On Samsung phones, Secure Folder does a similar job.
Close the side doors
A locked app can still give itself away.
- Notification previews. If your journal sends reminders, set previews to show only when the phone is unlocked, or never.
- Widgets. A "today's entry" widget on the Home Screen is a diary page on display. Remove it.
- Search. On iPhone, you can stop an app's content appearing in search and suggestions in its Siri settings.
- Photos you add to entries. Some apps copy them into your camera roll. Check before you add a photo you wouldn't want found.
- Handing the phone over. If you lend your phone to someone for one thing, Guided Access on iPhone (Settings, Accessibility) can keep it inside a single app until you take it back.
Write as if it might be read anyway
No lock is perfect, so the last layer is how you write.
Leave out names, or use initials only you understand. Write what happened to me more than what they did: it's more honest, and it's kinder to everyone if a page is ever seen. And skip the details that would identify someone else's secret. A diary is for your inside, not everyone else's.
Paper still works
A paper notebook can't sync to anyone's iPad. It can be found, but it can also be kept in a bag that only you carry, and it never sends a notification. If the phone is the problem, sometimes the answer is to take the diary off it.
Where Kindredly fits
Kindredly is mostly an app for writing anonymous letters to strangers. Its Notes side is a small private diary: a sealed page, a mood, your voice, a photo. Entries stay on your phone rather than syncing to a server, there's no real name on your pages, and nobody can see a page you haven't turned into a letter.
It has no lock of its own, so on a shared phone use the step above: touch and hold the Kindredly icon and choose Require Face ID.
The other thing it does: some pages don't want to stay pages. On those nights you can turn one into a letter to a stranger who doesn't know you, reads it slowly and writes back. No names unless you both decide to trade them.
If what you need is only a locked diary, Apple's Journal with its lock on, or any app from our anonymous journaling apps guide, will do the job. The lock matters more than the app.
pick one. i'll wait. (i'm a bird. i'm good at waiting.)
free · no profile · no photos of you
what you type stays on this device