OneSyntax

Small, sharp, native apps and tools.

A home for the apps and projects I build. Made by Subhash Jha.

Drink a glass of water
Grab coffee with Sam
Call mom
Water the plants
macOS 26+AGPL-3.0

OneCast

One keystroke for everything on your Mac.

A native launcher, AI cockpit, custom docks with live widgets, a plain-English scheduler and a Swift plugin runtime. Built with SwiftUI and AppKit, zero third-party dependencies, no Electron, no telemetry.

  • Docks, as many as you wantYour own docks on any edge of any display, with 21 built-in live widgets.
  • A scheduler that speaks English"Remind me to stretch every weekday at 4pm" and press return.
  • Native Swift pluginsCompiled SwiftUI plugins and dock widgets, alongside Raycast extensions.
  • AI, front and centreNamed assistants, your own Claude, Codex or Copilot CLI, MCP servers, on-device tools.

Swift 6 · SwiftUI · AppKit

A vertical OneCast dock with AirDrop, usage, CPU, RAM and network widgets
The OneCast launcher
A Stock Quotes plugin rendered in the OneCast palette
A custom OneCast dock with live widgets
macOS · iOS 26+New: ScenesFree

OnePaper

Beautiful notes for engineers.

A Craft-style block editor for Mac, iPad and iPhone, made for code, math, papers and whiteboards. Now with Scenes: 3D architecture diagrams you can present like a film, or drop into a slide deck. Every page is a sheet in its own colour, and everything syncs privately through your own iCloud.

  • Scenes, in 3DArchitecture on paper boards, with packets flowing, lit by your page theme, presented shot by shot.
  • A block editor that keeps upSlash commands, Markdown as you type, [[links]] with backlinks, comments and embeds.
  • Made for code and MLHighlighted code in 20 languages, LaTeX math, Mermaid, tables and databases.
  • Papers, whiteboards and tasksAnnotate PDFs beside your notes, sketch on Excalidraw, and gather every to-do.

Swift 6 · SwiftUI · SwiftData + CloudKit

The OnePaper library: page previews as cards in their page coloursThe PDF reader with highlights, a boxed figure and the Notes pane
macOS 11+Apache 2.0

OnePrompt

A terminal drawn like an ink painting.

Text is written in by hand, ink bleeds into hand-made paper, and deleting a file cuts its name through with a sword. Under the art is a real terminal with tabs, splits, regex find and true colour.

  • Written by handNew text is traced along each letter’s pen path as the ink bleeds and dries.
  • Strikes what you deleterm a file and every mention of it on screen is cut through.
  • Every theme, its own wayTsushima, Chalkboard and Logbook each animate in their own style.
  • A real terminalTabs, splits, find with regex, clickable links, IME, mouse and images.

Rust · wgpu

OnePrompt, Logbook light themeOnePrompt, Chalkboard theme