# Gaugefolio: Calibration — Instruments, Due Dates & Drift

> Instruments, Due Dates & Drift (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/gaugefolio-calibration/id6792205830 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Business, Utilities
- Price: $2.99 (on sale, was $3.99)
- Age rating: 4+
- Requires: iOS 17.0 · 162 MB
- Released: 2026-07-28
- Data updated: 2026-09-05
- User reviews in markdown: https://appshunter.io/ios/app/gaugefolio-calibration/id6792205830/reviews.md

## What is Gaugefolio?

Gaugefolio is an offline calibration desk for small shops and labs that have outgrown a loose spreadsheet but do not need an enterprise subscription.

Give a small instrument fleet a clean offline register for owners, locations, standards, certificates, readings, drift, and due dates.

KEY FEATURES
- Instrument register with owner and location
- Calibration and intermediate-check history
- Certificate and evidence attachments
- Entered tolerance, deviation, and margin arithmetic
- Due, overdue, and rotation checkpoints
- PDF internal status brief
- Optional local photos through Apple's Photos picker
- Local PDF project brief
- 230 original offline reference plates
- No account, ads, analytics, tracking, subscription, or network requirement

Gaugefolio is a local asset and evidence organizer. It does not perform or certify calibration, calculate measurement uncertainty budgets, determine conformity for regulated use, lock out equipment, or replace approved quality systems, accredited laboratories, standards, and qualified metrology personnel.


## Version history (last 1 release)

### 1.0 — 2026-07-28

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 2026-09-05.*