Shizumu is a private writing app. Open it and start the sentence: there is nothing to structure first, and nowhere to file it. You write to think, you pin what matters, and you trail what continues. The volume of writing is not the artifact; what you pin is. Every page starts empty, so the first sentence is the first thing that happens.
Pages flow into a daily memory you can scroll back through and search by content. Pins lift the lines that matter out of the daily stream: checklists, references, anything you want close at hand. Trails group writing that belongs together (a project, a book, an ongoing thread of thought) without forcing you to design a structure first, and the first time you put a page on a trail, the pins you already kept there come back onto the page. A trail can be a run of dated pages, or a continuous trail: one living document for a thread that should keep growing, such as a book, with a marker for each day you wrote in it. That is the one intentional exception, and you choose it.
The editor is keyboard driven. Type / for a table, a chart, an outline or a block of code; type @ to reach a page, a pin or a trail. Ctrl+K opens the trail index, Ctrl+P pins from the cursor, Ctrl+F finds, and a shortcuts panel lists the rest.
Local-first by design. Everything stays on your device, in a SQLite database you can open with any compatible tool. Sync is optional and end-to-end encrypted: your writing is sealed on your device before it leaves it, the keys are derived there and never leave, and the relay holds what it cannot read. Neither can we. Your writing remains yours.
Shizumu fits the writer who keeps a daily log, the developer with one trail per project, the student capturing reading notes, and anyone who wants a private place to write to think without learning a system first.
Find what you kept. The pins panel on the desktop and the pins screen on the phone have a search field and a row of chips with counts: this trail, all trails, carries forward, on this page, and kind. On a nested trail the pins sit in two sections, the ones kept on this trail and the ones from parent trails. On a wide window the pins sit beside the page, and the page stays live.
Memory has a field to find a trail, shows the pages and pins of every trail, and lists the filters in force as pills you can remove. The trail map shows each page's first line and the pins kept from it.
A decision can be standing or superseded: tap its chip, or press mod+enter on the desktop. A question with no answer reads as open until it is answered.
The phone can export: settings, data, export packs every page as markdown files into one zip, in a folder per trail, and hands it to the share sheet. An export marks decisions, tables, code and pinned blocks, so reading it back keeps them. A kept block can be unpinned from the block itself, on both, and both ask first.
One lock for every device. Turn the lock on, change the passphrase or turn it off on the desktop or the phone, and every paired device follows with the same passphrase. It travels end-to-end encrypted, like the pages, so it is never typed twice. The phone has the desktop's lock settings, including lock after inactivity.
Fixes: a phone synced to a locked desktop no longer asks for a passphrase that could not open it. A page's focus no longer empties after a trail is created from the header. A pinned list turned into tasks keeps its pin. Pinning a range over a titled block no longer renames it. Escape out of a nested list leaves no empty line. A page that arrives unchanged from the other device no longer reloads under the caret. A pasted decision keeps its state. Deleting all writing says when some of it has not reached the other device yet. A keyring that starts locked no longer asks at every launch, and the desktop that set up sync shows its recovery phrase again.
