Download SpektraLab

The Mac app is the full darkroom. On iPhone and iPad, SpektraLab is on the App Store. Windows has an early pre-release.

Current release

macOS

Version 1.3.5 · 2 November 2026 · 30.7 MB

Apple silicon · macOS 15 or later · Signed with a Developer ID and notarised by Apple. Open the DMG and drag SpektraLab to Applications.

Download the DMG Release notes

SHA-256479bf4724c0de5a000c3ffde21ee88d2ac0e3445278b02dc32082668d27ab0a1

New in 1.3.5

  • The window follows edits made by the command line, the MCP server or a script, without reopening the frame.
  • Original works again after a relaunch, on a frame restored from its saved print.
  • The histogram follows the picture: the original while Original is shown, and every Post-Dev edit.

App Store

iPhone and iPad

Version 1.1.2 · Free

iOS 17 or later. One app for iPhone and iPad, built on the same mathematics, with an engine reimplemented for mobile.

Get it on the App Store

Pre-release

Windows

Version 1.3.4 · x64 installer · 39.1 MB

Needs a Vulkan graphics driver and the Microsoft Edge WebView2 Runtime. The installer is not code-signed yet, so Windows may warn before it runs.

Download the installer Release notes

An early build, made automatically from the Windows branch. Expect rough edges, and please report what breaks.

SHA-256d0152aa93306074346e6f992a3980dd450b0a5a9ac612be6ef26bd9f9974be89

Linux is in development on GitHub. No builds are published yet.