Every scrape leaves a trace.

A private tillering notebook for bowyers

Measure.
Compare.
Remember.

Build a stave record, add ordered tillering sessions, chart force-draw samples, attach drawn, front, and resting views, and compare two photos with an adjustable overlay. Export a PDF or portable backup when the record needs to leave the bench.

Requires iOS or iPadOS 17.0 or later. Tiller Trace is a recordkeeping and comparison tool, not structural analysis, inspection, training, or a guarantee that a bow is safe.