Graincount: Microstructure

Grain Count Ledger

₪12.90 · Designed for iPad. Not verified for macOS.

Place every intercept yourself, calibrate against your own scale bar, and leave with a hash-chained grain-size worksheet you can defend. Graincount: Microstructure is a planar grain-size worksheet that keeps a human at the eyepiece. It opens on a labeled synthetic worked example, so the whole workflow is visible before you import anything of your own. Does it segment grains for me? No, and that is deliberate. You import a micrograph as immutable evidence, then place, classify, and weight every intercept crossing or grain tally yourself; the app's job is geometry, arithmetic, and record-keeping, never automated detection. How do my marks become a grain size? A two-point calibration against a feature of known length (nm, um, or mm) fixes the scale. Accepted marks on drawn intercept lines pool into a Heyn-style mean intercept, while counts inside planimetric frames yield grains per square millimetre and an equivalent-circle diameter, with sample standard deviation reported across fields. Will the number survive an audit? Every commit becomes an immutable revision: the snapshot is canonicalized, hashed with SHA-256, and chained to its parent. You can inspect any revision's diff, restore an older one as a new revision, and export the worksheet as a project package, CSV, or PDF that states its own limitations. Everything computes and stays on your own device, and one purchase covers the app for good - no subscription meter running.

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The developer, Robert Corbin, 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.

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    Accessibility

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    Information

    Provider
    • Robert Corbin
    Size
    • 1.7 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 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 Robert Corbin
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

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

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