Sumi: native Mac/iPhone outliner that opens Logseq markdown graphs (free beta)
Started by Sumi dev
on 10/13/2026
Sumi dev
10/13/2026 3:53 pm
Hi, I'm the developer of Sumi, a native Swift outliner for Mac, iPhone and iPad.
It opens an existing Logseq file graph as it is: a folder with pages/ and journals/, tab-indented bullets, properties. Nothing is converted or imported. Other tools that edit the same folder (a text editor, git, Syncthing, Logseq itself, but not at the same time) keep working.
What works today: daily journals, [[links]] and #tags, backlinks and unlinked references, block references and embeds, aliases, namespaces, properties, TODO/DOING/DONE with scheduled and deadline dates plus an agenda, templates, simple and advanced queries (with sort-by), full-text search, iCloud Drive or any Files folder. It stays fast on a large graph (I tested almost 10,000 pages across 16 public graphs, and open + save changed no file). Daily snapshots can be restored.
Not there yet: whiteboards, plugins, PDF annotation, .org files. It is an outliner for the Logseq file format, not a general-purpose outliner with its own format.
It is a free TestFlight beta. After the beta it becomes a paid app: EUR 2.99 per month or EUR 29.99 per year with a 14-day trial, or EUR 79.99 once for a lifetime license.
Beta: https://testflight.apple.com/join/B1sKJk24
Site: https://sumi.mikaili.io
Demo GIF: https://sumi.mikaili.io/img/sumi-demo.gif
It opens an existing Logseq file graph as it is: a folder with pages/ and journals/, tab-indented bullets, properties. Nothing is converted or imported. Other tools that edit the same folder (a text editor, git, Syncthing, Logseq itself, but not at the same time) keep working.
What works today: daily journals, [[links]] and #tags, backlinks and unlinked references, block references and embeds, aliases, namespaces, properties, TODO/DOING/DONE with scheduled and deadline dates plus an agenda, templates, simple and advanced queries (with sort-by), full-text search, iCloud Drive or any Files folder. It stays fast on a large graph (I tested almost 10,000 pages across 16 public graphs, and open + save changed no file). Daily snapshots can be restored.
Not there yet: whiteboards, plugins, PDF annotation, .org files. It is an outliner for the Logseq file format, not a general-purpose outliner with its own format.
It is a free TestFlight beta. After the beta it becomes a paid app: EUR 2.99 per month or EUR 29.99 per year with a 14-day trial, or EUR 79.99 once for a lifetime license.
Beta: https://testflight.apple.com/join/B1sKJk24
Site: https://sumi.mikaili.io
Demo GIF: https://sumi.mikaili.io/img/sumi-demo.gif
