People who type "journal software" into a search box tend to want the same thing, and it isn't quite what they get back. They want a program — something that installs, opens in a window, and sits on the computer they already use. What comes back is mostly websites asking for an account and phone apps asking for $50 a year. Cozy is the program.
It's a desktop program, not a web page
Cozy is a native application for macOS and for Windows 10 and 11. It installs like any other program, lives in your Dock or taskbar, follows your system's light and dark mode, and opens without a browser anywhere in sight. There's no tab to keep open and no session to expire.
That also means it works with the internet off. There's no server on my end for it to reach, so writing on a plane, on a train, or in a house with bad wifi is the same experience as writing anywhere else.
Diary software, journaling program, journal application
All the same thing. Whatever you call it, the job is small and specific: open it, write what happened, close it, and be able to find it again later. Cozy gives you a dated entry, a calendar to move back through the months, moods and trackers if you want them, and photos, video and audio dropped straight into the day they belong to.
Your writing is a folder of files, not a database
This is the part that makes the software worth owning rather than renting. Every entry Cozy writes is a plain Markdown file — a .md text file — inside a folder you picked when you set it up.
- Readable by anything. Notepad, TextEdit, VS Code, a different journal app entirely. No export step, ever.
- No account. Nothing to sign up for, no password, no profile, no email address I have to keep safe.
- No database to corrupt. If one file goes wrong, it's one day, not the whole journal.
- Yours if the software goes away. If I stop working on Cozy tomorrow, you keep the folder and every word in it.
One purchase, every machine
Cozy is a one-time $35. That single license covers every Mac and every Windows PC you own, and Cozy for iPhone comes with it. Each license includes a year of updates; after that the software keeps working exactly as it is, forever, and another year of updates is an optional $17 if you want it.
There's no monthly tier and no plan to add one. The reason is structural rather than generous: with no server running, there's no recurring cost on my side to pass on to you.
How the main options compare
I make one of these, so weigh my opinion accordingly. These are the facts I'd want if I were choosing, and where something beats Cozy it says so.
| Cozy | Day One | Diarium | Obsidian | |
|---|---|---|---|---|
| Price model | One-time — $35, all your Macs and PCs, iPhone included | Subscription — $49.99–$74.99 / year | Cheap per platform · Premium subscription for extras | Free for personal use · Sync $48 / year |
| Runs as a desktop program | Yes — Mac, Windows | Yes — Mac, Windows | Yes — Windows, Mac | Yes — Mac, Windows, Linux |
| Where entries live | Plain Markdown files in a folder you pick | Day One's servers, own format, end-to-end encrypted | Its own database | Plain text files in a folder you pick |
| Built for a dated journal | Yes — calendar, dated entries, moods | Yes | Yes, plus automatic life-logging | No — you build it yourself |
| Works fully offline | Yes — there's no server to reach | Sync needs a connection | Yes, syncs when you reconnect | Yes — files are on your disk |
Day One
The most polished journaling software on either platform, and the one most people try first. Sync across everything is handled for you and the photo handling is excellent. The trade is the arrangement: $49.99 a year for Silver or $74.99 for Gold, and entries sit on Day One's servers in a format only Day One reads. Cozy vs Day One →
Diarium
The most Windows-native of the bunch, and genuinely good if you want a diary that fills itself in — steps, weather, photos, social posts. Entries live in its own database and sync through OneDrive, Google Drive, Dropbox, or Diarium Cloud. If automatic life-logging is the appeal, it beats Cozy at it. Cozy vs Diarium →
Obsidian
Free for personal use, and it shares Cozy's central idea: plain text files in a folder you own. Plenty of people journal in it. The difference is setup — folders, tags, templates, plugins, and no calendar or dated entry unless you build one yourself. Cozy vs Obsidian →
Journey
The widest reach of any of them: Mac, Windows, Linux, iOS, Android, and a web app. If you need Android or Linux, Cozy can't help you and Journey can. Entries live in Journey's cloud, and it's $6.99 a month or $49.99 a year. Cozy vs Journey →
Where Cozy falls short
Worth hearing from me rather than finding out later. There's no Linux build, no Android app, no iPad app, and no web version — Cozy is Mac, Windows, and iPhone. There's no sync service either: you put the journal folder in iCloud, Dropbox, or OneDrive yourself, which takes a minute and then works, but it is a minute the subscription apps don't ask of you. And there's no free tier, only a trial.
By platform: journal software for Mac, journal software for Windows, and a journal app for iPhone.
Related reading: the best journaling apps in 2026, a journaling app without a subscription, an offline journaling app, and a private journaling app.