One library per machine
Store settings by machine, material, thickness and operation: engrave, score, cut, fill or photo. Search and filter by machine, material or operation.
For diode, CO2 and fibre laser owners
Kerfbook Find them again in seconds.
Kerfbook: Laser Settings Log (decided 2026-10-05). C# .NET 10 MAUI, iPhone + Android, fully offline, no server. Companion for hobby/small-business laser engravers and cutters (diode, CO2, fibre; xTool, Glowforge, LaserPecker, Atomstack, Ortur, Creality Falcon, Sculpfun) - it never controls a machine. Machines (type, wattage, lens, speed units mm/s or mm/min, power % or S-value); settings library per machine x material x thickness x operation (engrave/score/cut/fill/photo) with power, speed, passes, line interval/LPI, air assist, focus offset, notes, star rating, result photos; search/filter; scale a setting to another machine by wattage ratio (labelled starting point). Built-in starter materials with a safety flag: PVC/vinyl/ABS/polycarbonate etc. marked DANGEROUS, never given settings. Test-grid generator: power x speed matrix -> SVG/PNG via share sheet for LightBurn/xTool Creative Space; tap the best cell -> saved setting. Job cost & time quotes and job log with photo. Free: 1 machine, 15 settings, basic test grid, AdMob banner on library/list/settings screens (never on the test-grid canvas or full-screen photo). Pro $9.99 once (com.bekservice.kerfbook.pro): unlimited, scale-to-machine, cost/quote, CSV/JSON backup + import, PDF settings sheet, no ads. Laser-safety note in onboarding + about.
What it does
Every value you need
Record power, min power, speed, passes, line interval or LPI, air assist, focus offset, notes and a star rating for each setting.
Photos of the result
Attach photos to a setting so you can see what 30 % at 300 mm/s looks like on birch ply before you burn.
Test grids you can burn
Build a power × speed matrix and export a true-size SVG in millimetres with one layer colour per square. A layer legend is included.
Your software's units
Show power as a percent or as an S-value (GRBL), and speed in mm/s or mm/min, to match the laser software you use.
Material safety flags
PVC, vinyl, faux leather, ABS, polycarbonate, PTFE and fibreglass are marked never laser. Kerfbook will not store settings for them, even under a custom name.
A look inside
Tools for second machines and paid jobs
Move a setting to another laser
Pro scales a setting to another machine by wattage ratio, keeping the energy per millimetre the same. It respects 100 % power and the machine's maximum speed. The result is saved as a clearly marked starting point, never as a proven value.
Job cost and quotes
Pro adds up material, laser time, your time, machine wear, electricity, setup fee and markup into a price and a price per item. Estimate laser time from a saved speed, send the quote by message or email, and keep a job log with photos.
Free, Pro and your data
Free includes 1 machine, 15 settings and 5 × 5 test grids, with ads. Pro is a single one-time purchase: unlimited machines and settings, grids up to 12 × 12, CSV and JSON import and export, backup, a PDF settings sheet and no ads. All data stays on your phone.