A diary app for iOS is where you write entries on your iPhone or iPad. I look for three things: entries kept as your own files, no subscription, and no AI built in. Cozy has all three. It is a private alternative to the Apple Journal app, and it opens the same journal you keep on your Mac or PC.
I built Cozy for the desk first, a real window, a real keyboard, a calendar you can move through. But most of what's worth writing down happens away from the desk, so the journal had to come along. Cozy for iPhone and iPad is the same journal, reading the same folder of files, on whichever device is to hand.
A diary app for iPhone and iPad, if that's the word you use
Journal, diary, log: it's the same act either way. You open it, you write what happened, you close it. Cozy gives you a dated entry, a calendar to walk back through, and moods and photos if you want them. If you've been looking for a diary app for iPhone or iPad and kept landing on subscriptions or apps that keep your writing in their own database, this is the one that leaves it in files.
It does what the desktop app does
A lot of desktop apps ship a phone version that can only view things, or only capture things. Cozy on iPhone and iPad does what Cozy on the desktop does, write a new entry, go back and write into an old day, format text, add photos and video, tag and track. It's reading the same files, so an entry you start on the couch is the same entry you finish at your desk.
Your entries stay plain files, on iOS too
- Plain files. Every entry is a text file you can open in the Files app, in any editor, on any computer.
- No account. Nothing to sign up for, no password, no profile.
- No Cozy server. The only thing that reaches me is an anonymous crash report when something breaks, never your entries. Your writing only touches your own iCloud.
- Nothing to leave. Because it's your folder, walking away from Cozy costs you nothing: the journal is already in a format that outlives the app.
Sync runs through your iCloud Drive
Keep your journal folder in iCloud Drive on your Mac or PC and Cozy on your iPhone or iPad opens that same folder. Apple does the syncing; Cozy just reads the files. There's no sync server on my end to pay for, which is why there's no monthly fee.
The trade is that iCloud Drive is the only route to iOS. Between computers you can use Dropbox, OneDrive, or anything else that syncs a folder. To an iPhone or an iPad, it has to be iCloud.
One purchase, and the phone and iPad come with it
Cozy is a one-time $49, and that single license covers every Mac and Windows PC you own plus Cozy for iPhone and iPad. The app is free to download; type in the email you bought with and it unlocks (the launch post walks through it). If you start on the phone, buying inside the app is $49.99, once, not monthly, and it includes the desktop app too.
How does Cozy compare to other iOS journal apps?
Where another app beats Cozy on iOS, the table and the notes below say so.
| Cozy | Day One | Apple Journal | Journey | |
|---|---|---|---|---|
| Price model | One-time: $49 with iPhone and iPad included, or $49.99 in the app with desktop included | Subscription: $49.99–$74.99 / year | Free | Subscription: $6.99 / month or $49.99 / year · $199 lifetime |
| Where entries live | Plain text files in your own iCloud Drive | Day One's own database, synced through its servers, end-to-end encrypted | Inside Apple's Journal system | Journey's cloud, or Google Drive |
| Account required | No | Yes, for sync | Apple ID | Yes, Google or email sign-in |
| Platforms | iPhone, iPad, Mac, Windows | iOS, Android, Mac, Windows, web | Apple only: iPhone, iPad, Mac | iOS, Android, Mac, Windows, Linux, web |
| Sync | Your own iCloud Drive | Built in and handled for you | iCloud, automatic | Built in: Journey's cloud, or your Google Drive |
Day One
The most polished journal on the iPhone. Sync across iPhone, iPad, Mac, and Apple Watch is handled for you and it works well, the photo handling is excellent, and the end-to-end encryption is real. But it's $49.99 a year for Silver or $74.99 for Gold, and your entries sit in Day One's own database, read by its app. If you want Android today, it beats Cozy. Cozy vs Day One →
Apple Journal
Free, already on your phone, and Apple's privacy claims here are not marketing: entries are encrypted on device and in iCloud. If you live entirely on Apple devices and want nothing more than a place to write, there's a real argument for just using it. The catch is that your journal lives inside the Journal system and your Apple ID: it isn't there the day you sit down at a Windows machine, and getting the writing out as files means an export. Cozy vs Apple Journal →
Journey
The most cross-platform of the bunch: iPhone, Android, desktop, and a web app, with a clean interface and a Google sign-in. If you switch between an iPhone and an Android, or want to write from a browser at work, Journey does things Cozy doesn't. Entries live in Journey's cloud or your Google Drive rather than as files you hold. Cozy vs Journey →
Where Cozy falls short on iOS
Two things: there's no Android version, so if your household is split, Day One or Journey serves you better. And sync to iOS only works through iCloud Drive; if you've built your life on Dropbox, that's a folder you'll have to move.
Head-to-head: Cozy vs Day One, Cozy vs Apple Journal, Cozy vs Journey.
Related reading: the best journaling apps in 2026, a journal app for Mac, a private journaling app, and a journaling app without a subscription.
“I'm loving Cozy so far and can't wait to try out the iPhone app as well when it's ready. Everything is working really well and it is a great writing experience in the app, very enjoyable to use.”