# Processquanta: SPC Lab — Control charts and capability

> Control charts and capability (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/processquanta-spc-lab/id6792825345 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Productivity, Utilities
- Price: $2.99 (on sale, was $3.99)
- Age rating: 4+
- Requires: iOS 17.0 · 87 MB
- Released: 2026-07-30
- Data updated: 2026-09-09
- User reviews in markdown: https://appshunter.io/ios/app/processquanta-spc-lab/id6792825345/reviews.md

## What is Processquanta?

Processquanta: SPC Lab is a focused, fully on-device app. On-device statistical process-control studio for I-MR, Xbar-R, p/np/c/u charts, rules, Cp/Cpk/Pp/Ppk, Gage R&R screening, lot comparisons, and audit-ready exports.

KEY FEATURES
- I-MR control chart
- Cp/Cpk and Pp/Ppk
- Special-cause flags
- Local part and setup evidence
- Editable sample data and CSV import
- Side-by-side scenario comparison
- Local PDF evidence export
- Fifty-three original offline reference plates

ONE-TIME AND PRIVATE
- One paid download; no subscription or in-app purchase
- No account, advertising, analytics, tracking, or developer-operated backend
- Core features and bundled content work offline
- Work remains on device unless you deliberately share or export it through an Apple system interface

Control charts support investigation but do not authorize product release. Validate the measurement system, subgroup design, distribution assumptions, reaction plan, and quality requirements.


## Version history (last 1 release)

### 1.0 — 2026-07-30

No release notes.

## More apps by Robert Corbin

- [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266)
- [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175)
- [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447)
- [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025)
- [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719)
- [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/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 2026-09-09.*