# Graincount: Microstructure — Grain Count Ledger

> Grain Count Ledger (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/graincount-microstructure/id6799453520 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Utilities, Productivity
- Price: $0.99 (on sale, was $3.99)
- Age rating: +4
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-09-16
- Data updated: 2026-10-24

## What is Graincount?

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.

## Is Graincount safe?

Not enough ratings yet to assess Graincount.

## Is Graincount legit?

Graincount: Microstructure appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Graincount is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-16

No release notes.

## More apps by Robert Corbin

- [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266)
- [Hush Secret Text: Encryption](https://appshunter.io/ios/app/hush-secret-text-encryption/id6761658175)
- [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447)
- [Receipt to PDF: Expense Report](https://appshunter.io/ios/app/receipt-to-pdf-expense-report/id6761782025)
- [Route Your Pay: Mileage Log](https://appshunter.io/ios/app/route-your-pay-mileage-log/id6761783719)
- [Tip Arbiter: Tip Calculator](https://appshunter.io/ios/app/tip-arbiter-tip-calculator/id6761786879)

All apps by Robert Corbin: https://appshunter.io/developer/1890247992

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*