ShotView

A native macOS app for browsing and analyzing espresso shots from your Decent Espresso machine. Two-pane layout like Mail: pick your shot history folder, shots load in a sidebar, interactive graphs render on the right.

Built entirely with Apple frameworks — SwiftUI + Swift Charts. No third-party dependencies, no Electron, no web views.

⬇︎ Download the latest release (macOS 14+, universal). It's not notarized, so you'll need to bypass Gatekeeper once on first launch — see Downloads and Gatekeeper.

Features

• Reads three shot formats, auto-detected and de-duplicated:

  • Modern Decent .json shot files
  • Legacy Tcl-dictionary .shot files
  • Visualizer CSV exports

• Interactive charts — hover for a crosshair and a tooltip with the exact pressure, flow, weight flow, and temperatures at that moment. Dotted goal lines match their measured line's color. Fahrenheit shot files are converted to °C automatically.

• Shot comparison — ⌘-click (or ⇧-click / ⌘A) to select multiple shots and overlay them: color identifies the shot, line style identifies the metric, with legends for both.

  

• PNG export (⌘E, toolbar, or right-click) of any shot or comparison, rendered at 2× and matching your light/dark appearance.

• Color schemes — Classic, Monokai, Solarized, Dracula, and Nord presets, each with light- and dark-tuned palettes, plus fully custom colors (Settings, ⌘,).

• Mac-native throughout — full menu bar with shortcuts, arrow-key navigation, copy shots as files or text summaries (⌘C), drag rows out to Finder, drop a folder (or the Dock icon) to open it, context menus with Show in Finder, remembered folder and sort order, Mail-style status bar.

Building

Requires macOS 14+ and Xcode (or the Command Line Tools).

./build-app.sh     # builds ShotView.app (generates the icon on first run)
open ShotView.app

Or during development:

swift run ShotView

Headless utilities for testing:

swift run ShotView --dump <folder>                  # parse and summarize shots
swift run ShotView --export <folder> <out.png> [n]  # render first n shots to PNG

Downloads and Gatekeeper

Building from source (above) is the recommended install — locally built apps are never quarantined, so there are no Gatekeeper warnings.

If you download a pre-built ShotView.app instead: releases are not notarized (no paid Apple Developer account), so macOS will refuse to open it at first. Either:

• Open it once, then go to System Settings → Privacy & Security and click Open Anyway (macOS 15+), or right-click → Open on older versions; or

• Clear the quarantine flag in Terminal:

  xattr -d com.apple.quarantine ShotView.app

Maintainers with a Developer ID certificate can produce a notarization-ready build with SIGN_IDENTITY="Developer ID Application: … (TEAMID)" ./build-app.sh (see the comments in build-app.sh for the notarize/staple steps).

Where are my shot files?

The Decent tablet app stores history in de1plus/history/. Copy that folder (or any folder of .shot / .json / Visualizer .csv files) to your Mac and open it with ⌘O — the app remembers it across launches.

Built with AI

This app was built collaboratively with Claude (Anthropic's Claude Code), using the "Mac-arsed Mac app" skill to guide it toward genuine macOS conventions — native menus and keyboard shortcuts, pasteboard and drag-and-drop support, contextual menus, and window/state behaviour that follows the platform rather than merely running on it. Every line of code was written from scratch during that process; there are no third-party dependencies.

License

MIT — © 2026 Andrew F.

Not affiliated with Decent Espresso or Visualizer. Shot file formats belong to their respective projects; parsing was implemented independently from sample files.