# Early Strength

> Early Strength (iPhone/iPad app by Master Builders Solutions Deutschland GmbH.)

- Source: https://appshunter.io/ios/app/early-strength/id1545402612 (this page in markdown: same URL + `.md`)
- Developer: [Master Builders Solutions Deutschland GmbH](https://appshunter.io/developer/1521874754)
- Category: Business
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 7 MB
- Languages: English
- Released: 2021-03-30
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/early-strength/id1545402612/reviews.md

## What is Early Strength?

The Early Strength App for underground construction calculates the early strength of sprayed concrete up to a level of 1 MPa based on penetration needle results. The calculation background is the Austrian Guideline on Sprayed Concrete and the EN 14488-2 “Compressive Strength of young Sprayed Concrete. The input for the calculation is the penetration force of a 3 mm diameter needle, which is pushed 15 mm into the sprayed concrete. The App allows to control the timing, store the readings of the penetration force and convert it to compressive strength. The results are displayed in a graphical way by showing the strength development over time with reference to the J curves. All data may be transferred as text files for further evaluation.


## Version history (last 1 release)

### 1.0.3 — 2021-12-02

This update contains small fixes and minor improvements.

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## More apps by Master Builders Solutions Deutschland GmbH

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All apps by Master Builders Solutions Deutschland GmbH: https://appshunter.io/developer/1521874754

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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 2026-05-19.*