Luthier Toolkit
Fret, string & setup tools
$14.99 · Designed for iPad. Not verified for macOS.
Calculators, printable templates and instrument records for guitar builders and techs. One price, no subscription.
Luthier Toolkit puts the numbers you need at the bench in one place: fret positions, string tension, radius, spacing, neck angle, compensation and more, with printable full-size templates and records for every instrument you build or set up.
BUILD
• Fret positions for any scale, with a printable 1:1 slotting template
• Multiscale (fanned) frets with nut and bridge angles and a full-size template
• String tension from published unit weights, with balanced sets matched to any string, multiscale and custom string counts
• Compound radius, edge drop and cross-sections
• Nut and bridge string spacing, equal gaps or equal centres, with a printable template
• Neck angle and saddle height
• Saddle compensation per string
• Plate thickness by deflection and stiffness
• Air resonance of the body
• Tap tone: live spectrum and tap capture with peaks and notes
SETUP
• Chromatic tuner with needle and strobe
• Intonation: how far and which way to move each saddle
• Published factory setup specs
• Wiring diagrams with parts and lead colours
RECORDS
• Instruments you build or work on: specs, strings, setup history, truss rod log and photos, with a one-page setup sheet
• Humidity log with safe range and wood moisture
REFERENCE
• 60 tonewoods: density, hardness, stiffness, speed of sound, shrinkage
• Fret wire sizes with refret wire length
• Wood movement from humidity
• Fraction calculator, board feet, shellac, epoxy and hide glue mixing
Every tool explains itself: a short guide the first time you open it, and ⓘ notes on the fields.
Inches, fractions or millimetres throughout. Works offline. No account, no ads, no tracking.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Nerd Alchemy LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nerd Alchemy LLC
- Size
- 6.7 MB
- Category
- Music
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Nerd Alchemy
