# Maturityline: Concrete — Temperature-time field log

> Temperature-time field log (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/maturityline-concrete/id6792647143 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Productivity, Utilities
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.0 · 80 MB
- Released: 2026-07-30
- Data updated: 2026-08-11
- User reviews in markdown: https://appshunter.io/ios/app/maturityline-concrete/id6792647143/reviews.md

## What is Maturityline?

Maturityline: Concrete is an on-device concrete workbench for time-temperature factor, equivalent-age, and maturity-strength estimates across pours and curing scenarios.

KEY FEATURES
- Nurse-Saul maturity integration
- Arrhenius equivalent-age estimate
- Timestamped concrete temperature history
- Datum, reference-temperature, and activation controls
- Strength-target context kept separate from calculation
- Editable sensor records plus CSV import
- Pour scenario comparison
- Local PDF analysis packet
- Forty original offline concrete 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 tools and bundled reference material work offline
- Work remains on device unless you deliberately import, share, or export through an Apple system interface

Maturity estimates do not replace project calibration, test specimens, engineer approval, or required acceptance testing.


## 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 2026-08-11.*