GoldenARC Digital
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Tools for real work. Room for a personal note.

Small tools.
Clear purposes.

Read a recording. Turn paper into usable text. Write something by hand. Give coding agents a task they can check.

The ARC series

Local files. Useful output.

Focused Apple-platform tools that let you work with your own files.

Available

Mac & iPad

ARC EDF & BDF Viewer

Open and inspect biosignal recordings on Mac and iPad.

A native viewer for EDF, EDF+ and BDF files. Explore synchronized channels, inspect waveform values and read file metadata locally.

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Mac & iPad · Available

ARC EDF & BDF Viewer

Open and inspect biosignal recordings on Mac and iPad.

Open a recording

Open EDF, EDF+ and 24-bit BDF recordings. Start with the built-in synthetic demo before opening your own file.

Inspect channels together

Browse a synchronized multi-channel montage, adjust the time window and gain, and inspect waveforms with min/max envelope rendering.

Measure and understand the file

Place a cursor for time and calibrated amplitude readouts. Inspect recording metadata and per-channel sample rates, units and calibration values.

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iPhone & iPad · iOS 16+ · Coming soon

ARC Scanner

Turn paper into text you can use.

Capture or import

Scan multiple pages with the camera or select photos. Review pages and remove an unwanted page with undo.

Recognize text locally

Apple’s built-in frameworks recognize text on your device. Check the result before using it; recognition can make mistakes.

Choose a useful output

Export searchable PDF, plain text, structured JSON, plain PDF, JPEG or PNG. All Files packages the PDF, page images, text, JSON and manifest in a folder.

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More from GoldenARC Digital

Handwriting & developer tools

Different tasks, each with a dedicated product and support page.

Available

iPhone & iPad

Wishes by Hand

A gentle thought by hand, for someone you care about.

Write a few words by hand, turn them into a small card, and send them to family, friends, or someone you have been thinking about. 亲笔小卡 · 手写一点心意，给在乎的人。

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iPhone & iPad · Available

Wishes by Hand

A gentle thought by hand, for someone you care about.

Write, make a card, share

Use your finger or Apple Pencil to write a personal note. Choose a card and share it through the system share sheet.

Ink that follows your hand

Metal-backed stroke rendering supports responsive brush-like ink and Apple Pencil pressure.

An optional practice room

Explore the eight principles of 永字八法 with geometric, rule-based stroke scoring. Your handwriting is processed on the device.

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Open source

macOS, Linux & Windows

wtcraft

Git-native agent governance core.

A lightweight CLI for worktree-based agent workflows: task contracts, lifecycle state, deterministic scope checks and declared verification commands.

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macOS, Linux & Windows · Open source

wtcraft

Git-native agent governance core.

Make the task explicit

Keep scope, off-limits areas and verification commands in a local task contract. Create worktrees and inspect their lifecycle state.

Run deterministic checks

Check the Git changeset against the contract and run the declared verification commands. Machine-readable results can be used by other tools.

Use it with your coding tools

Install with npm, pipx or Homebrew. wtcraft does not launch coding agents or provide a model runtime. Its mutable task contract and on-demand checks are workflow evidence, not a security sandbox.

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Find the right help

Product support → Privacy & legal →

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