The Caliper Pro

Construction Layout Calculator

Only for iPhone

$29.99 · Designed for iPhone. Not verified for macOS.

iPhone

Precision layout, compound angles, material yield & board footage, with a fractional tape keyboard built for the jobsite. Save to projects. Export PDF job tickets. Caliper Pro is a professional-grade construction calculator built for trim carpenters, finish carpenters, millwork installers, and custom woodworkers. Four precision tools. One fractional tape keyboard. Zero guesswork. LINEAR LAYOUT ENGINE Enter an opening height, number of faces, and gap size. Get equal-division face heights and zero-point tape pull marks — ready to transfer directly to your tape. Visual diagram included. Precision toggle: work in 1/16, 1/32, or 1/64 fractions. Fat/lean indicators show exactly which direction the rounding went so you can compensate on the cut. COMPOUND ANGLE SOLVER Input wall angle and spring position. Get miter and bevel angles instantly — no trig tables, no guessing. Verified against industry-standard formulas. Gyroscope support for reading angles directly from your device. MATERIAL YIELD PLANNER Enter your sheet dimensions, part sizes, and kerf thickness. The nesting algorithm places parts with labeled positions (P1, P2…), flags impossible cuts before you start, and generates a cut list. Pinch to zoom the layout. LUMBER VOLUME CALC Board footage with adjustable waste factor. Enter price per board foot and get total material cost instantly. Exact values — no rounding surprises. FRACTIONAL TAPE KEYBOARD Purpose-built for construction input. Tap fraction buttons instead of typing decimals. Smart Convert turns any decimal into the nearest fraction at your chosen precision. Tape Measure Mode for fast entry. PROJECTS & PDF EXPORT Save any calculation to a project and room. Organize your work by job. Export a complete PDF job ticket with all rooms and calculations — ready to hand off or print on site. BUILT FOR THE FIELD Works offline, no internet required Dark interface reduces glare on the jobsite No ads, no subscriptions, no data collection Caliper Pro replaces the scrap-paper math. Get it right the first time.

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The developer, Spencer Garrett, 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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Spencer Garrett
    Size
    40.7 MB
    Category
    Utilities
    Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Spencer Garrett
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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