The idea

The gaps between tasks are worth keeping.

Interstitial journaling is the habit of jotting a line whenever you switch context — what you just finished, what you are about to start, the idea that surfaced on the walk. Small, timestamped, honest. Over a day the lines become a log; over a year, a memory you can search.

Freeze after a day

Entries freeze, so the past stays honest.

A day after you write it, an entry seals. You can add tomorrow, but you cannot quietly rewrite yesterday — the log stays a record of what actually happened, not what you wish had. It is the difference between a journal and a draft.

Stylised preview

Timeline & heatmap

A timestamped timeline, and a map of your momentum.

Entries stack down a timestamped column, so a day reads at a glance. Alongside it, a quiet activity heatmap shows how often you showed up — momentum you can see, without a streak nagging at you.

Two-column tablet timeline — coming soon

Stylised preview

Hashtags & search

Inline #tags, and instant full-text search.

Tag a thought inline as you write, then jump to every mention later. Full-text search runs over the whole log in an instant, so a line you jotted months ago is a keystroke away.

Stylised preview

Rich content blocks

Drop a table or a diagram into a note — still just text.

A timestamped line can carry a table, a checklist, or a mermaid diagram where it helps. Write the source; the block renders in place — and the entry stays portable markdown.

release.md — source

## Release checklist

| step   | owner | done |
| ------ | ----- | :--: |
| draft  | me    |  x   |
| review | team  |      |

- [x] write the notes
- [ ] tag the build

```mermaid
flowchart TD
  A[Draft] --> B{Keep?}
  B -->|yes| C[Wiki]
  B -->|no| D[Archive]
```

release.md — rendered

Release checklist

step	owner	done
draft	me	✓
review	team

write the notes
tag the build

.md Every block still serializes to portable markdown — no proprietary format, no lock-in. Your file stays a file you can read anywhere.

Cross-platform

Get Sosta on your device.

Free to use, no account required, and everything stays local. Here is what is ready today, and what is on the way.

Windows Soon
macOS Ready
iPhone Soon
iPad Soon
Android Soon
Android tablet Soon
Web Ready

Download for macOS All platforms →

Yours by default

Your words live on your machine, not ours.

Sosta is local-first. Start with no account, keep working offline, and own a single file you can read and carry anywhere.

On your device

Your notes live on your device — in a native app or your browser's private storage, never on a server you do not control.

One file you own

Everything exports to a single, portable .pile file, and your writing mirrors to plain markdown you can read anywhere. No lock-in.

Works offline

A native app or an installable web app — either way it keeps working on a plane, in a tunnel, or off the grid.

And soon, optionally synced across your devices — opt-in, encrypted, and your local file stays the source of truth.

Premium soon

A little more, when you need it.

The whole free core stays free — local-first, no account, your file on your device. Premium adds a few respectful extras for the people who want them.

Cloud sync Optional sync across your devices — and your local file stays the source of truth.
Dedicated workspaces Keep separate piles for separate parts of life — work, home, a project — each with its own tree and journals.
Better project tools Heavier planning for the tasks that outgrow a simple list, without weighing down the calm default.

Sync is opt-in, encrypted, and your local file stays the source of truth. An addition, never pressure.

Pay once — not every month. Premium is a one-time purchase you keep for good; only cloud sync, which we host for you, is a subscription. Prices aren't set yet — leave your email and you'll hear the founding price first.