Open source · Hosted or self-hosted
Your own cloud.
Your agents work in it too.
Calendar, notes, files, photos, mail and money. One place you own, in plain files, with AI that edits the same documents you see.
Everything in one place
Seven Tabs. One timeline. No subscriptions to juggle.
Each Tab is a plugin you can turn off. Together they replace a drawer full of apps, and they all share one search, one set of Tags and one place for your files.
- Calendar Your days, all of it, in one place.
- Tasks Plain Markdown tasks that show up on your calendar.
- Notes A block editor on top of plain Markdown.
- Files Your files on your server, fast.
- Photos Your library, without the cloud tax.
- Mail One calm inbox for every account.
- Money Give every euro a job, in plain files.
The lifelog
Your day, as it actually happened.
Most calendars only know your plans. calternal also keeps what you did: write “14:00 client review #studio” and it is on the grid, next to the photos you took and the notes you wrote.
- Log entries from the composer, your phone's calendar app, or an agent.
- Daily notes as plain Markdown, one file per day.
- Everything by date: files saved, photos taken, mail received.
Agentic by design
Agents see what you see.
Every User gets a private container with Claude Code, Codex and the calternal CLI ready to go. Agents edit your real Notes as a live collaborator, with their own cursor, and every change can be undone.
How agents work →$ calternal today
$ calternal log "14:00 - 15:30 client review #studio"
$ calternal search porto
$ calternal task new "Send Maré invoice"File over app
Your data is just files. Forever.
Notes are Markdown. Events are iCalendar. Photo metadata is XMP. Your Budget is a folder of readable text. The database is only an index, so you can always take your Home and leave.
Why plain files →Home/
├─ Notes/
│ ├─ Porto trip.md
│ └─ Reading list.md
├─ Journal/
│ └─ 20261014-dailynote.md
├─ Tasks/
│ └─ Send Maré invoice.md
├─ Money/Casa/
│ ├─ Budget.md
│ ├─ Accounts.md
│ └─ 2026-10.md
└─ Photos/2026/09/
├─ IMG_2041.HEIC
└─ IMG_2041.HEIC.xmpMalleable
Make it yours. Then make it smaller.
Dozens of themes, your own background, your own fonts. Everything is a plugin: turn off what you do not use and it is gone from the app.
Start in a minute. Move it home whenever you like.
Begin on calternal.cloud. One export moves everything to your own server, and back, whenever you want.