Optical revision bench

Put every revision
under glass.

Move a loupe across two PDFs or images, blink between versions, tune sensitivity, and jump straight to each detected change island—without uploading either file.

Coming to the App StoreGet support
Traceglass icon
Sample witness record

Product sheet revisions

2.95%

Three change islands cross threshold 26 in the sample comparison. The witness fingerprint binds both sources, calibration, page count, and spectrum.

  • Change regions03 ranked
  • Difference spectrum16 bands
  • Witness5332D356
Before

Product-sheet-v4.png

After

Product-sheet-v5.png

A calibrated inspection workflow

See structure inside the difference.

Traceglass turns raw changed pixels into a spectrum, ranked regions, a tunable threshold, and a source-bound witness fingerprint.

01

Place

Choose before and after PDF, PNG, JPEG, or HEIC files from the system picker.

02

Examine

Move the Loupe, Blink the versions, inspect the Heatmap, and calibrate noise away.

03

Witness

Export every changed page with regions, threshold, metrics, source fingerprints, and spectrum.

Designed for Apple hardware

A different optical instrument on every screen.

iPhone · Movable Loupe

Drag in two dimensions to reveal the after revision through the before image.

iPad · Spectrum Rail

A large asymmetric bench keeps ranked change regions and the sixteen-band signature beside the page.

Watch · Spectral Glance

Change percentage, region count, page, fingerprint, and exact-region handoff without scrolling.