Cozy vs Day One

Day One is the journaling app most people land on first. It's polished, it's everywhere, it works. I used it for a while. Most of the people who write to me about Cozy left it for the same reason: they opened their diary one morning and the app asked them to let an AI read it.

Is Cozy a good Day One alternative?

Cozy is a Day One alternative for one reason: your journal stays on your own computer as plain files, no AI ever reads it, and you pay once instead of every year. Your Day One export comes across in one step, photos and dates included.

It isn't a like-for-like replacement, and I'd rather say so here than let you find out after paying. Day One runs on Android and the web, and it syncs for you. Cozy does neither. If those matter more than owning the files, stay where you are. If they don't, the rest of this page is the detail.

The short version

• Whether an AI touches your writing. Day One's Gold tier is built around AI features. Cozy has no AI, and never will.
• Whether your journal can come with you. Your Day One export goes into Cozy in one step, entries and photos included.
• Where your entries live. Day One stores them on their servers. Cozy stores them in a folder on your own computer, Mac or Windows.
• What format they're in. Day One uses its own format that only its app can read. Cozy uses simple text files any app can open.
• How you pay. Day One is a yearly subscription ($49.99 or $74.99 per year, depending on the tier). Cozy is $35 once for desktop, with Cozy for iPhone and iPad included.
• What happens if the app disappears. With Day One, you need to export. With Cozy, you open your folder.

The AI difference

Day One's Gold tier is built around AI: it can summarise your entries, ask you questions about them, and write back to you about your own life. The features are opt-in, but the invitations to use them are not, and for a lot of people that was the moment the app stopped feeling private.

Cozy has no AI in it. There's no chat window, no summary of your year, no assistant offering to look through what you wrote. Nothing you write is read, trained on, or sent anywhere, and there's no server for it to be sent to. That isn't a feature I haven't got round to yet, it's the point of the app. I wrote a longer post about why Cozy doesn't have AI if you want the full reasoning.

Bringing your Day One journal across

This is the first thing people ask me, and fair enough. Nobody wants to retype ten years of diary.

In Day One, export your journal as JSON. You get a zip. In Cozy, press Import next to Day One on the welcome screen and pick that zip. That's the whole move. One step, and it's all in.

Your entries come across with their dates, titles and tags. Your photos and videos come with them, copied into the journal folder instead of left behind in the export. So do your places, which means the imported years show up on the map on the first day.

A few things don't make the trip: the time of day, Day One's automatic weather and step count, and anything Day One keeps out of its export entirely. I wrote the move up in full, screenshots and all, in how to move your Day One journal to Cozy, including what doesn't come across.

None of it touches Day One. An export is a copy, so your journal stays exactly where it is while you try Cozy with your real writing in it.

Where your journal lives

Day One keeps your entries on their servers and syncs them down to your devices. They use end-to-end encryption, which is genuinely good. But the entries are still stored in a place you don't directly control, in a format only Day One can read.

Cozy doesn't have a server. Your entries are saved as regular files inside a folder you choose. You can open that folder right now and read your entries in any text editor. They're just files.

How sync works

Day One handles sync for you. That's convenient, and it's part of what you pay for.

Cozy doesn't handle sync. But because your journal is just a folder, you can put it inside iCloud, Dropbox, or any similar service and it syncs the same way your other files do. One less service to trust, one less account to manage. If Cozy for iPhone and iPad is part of your setup, use iCloud Drive, it's the only folder an iOS app is allowed to read.

Pricing

Cozy is $35, once. One license covers every Mac and Windows computer you own, and Cozy for iPhone and iPad comes with it. Day One is a subscription: $49.99 a year for Silver, or $74.99 a year for Gold, which is the tier with the AI features. You keep paying every year to keep using it.

Day One does have a free Basic tier, with limits: one photo per entry, and no sync across devices. Bought on its own, Cozy for iPhone and iPad is $19.99, once. No subscription, ever.

Put another way: Cozy for your computer and your phone is $35, paid one time. Day One Silver is $49.99 a year, every year, for as long as you want to keep reading your own diary.

If the company goes away

This is the part I think about most. If Day One shuts down or changes direction, you have to export your entries before you lose access. If you miss the window, your journal is gone.

If Cozy shuts down, you open your folder and keep going. The files were always yours. That's the whole point.

So which one is for you?

If you want sync handled for you across every device you own, including Android and the web, and you don't mind paying every year, Day One does that better than anyone.

If you want a quiet journal that lives on your own Mac, PC, iPhone and iPad, in files you control, paid for once, that's what Cozy is for.

Comparing other apps? Read Cozy vs Obsidian, Cozy vs Bear, Cozy vs Diarium, or Cozy vs Apple Journal.