# SPT Rocks

> SPT Rocks (iPhone/iPad app by Haluk Isik.)

- Source: https://appshunter.io/ios/app/spt-rocks/id886258382 (this page in markdown: same URL + `.md`)
- Developer: [Haluk Isik](https://appshunter.io/developer/886258385)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 7.1 · 9 MB
- Languages: American English
- Released: 2014-06-15
- Data updated: 2026-08-24
- User reviews in markdown: https://appshunter.io/ios/app/spt-rocks/id886258382/reviews.md

## What is SPT Rocks?

Enter blow counts and necessary soil parameters and the program calculates some important soil properties according to chosen correlation formulas.

Features:

- Calculates

* Effective stress
* Relative compaction
* Unconfined compressive strength
* Undrained shear strength
* Shear wave velocity
* Stress-deformation modulus
* Dynamic shear modulus

- Plots graphs where users can zoom in and out

- Ability to choose between measurement units: metric and US.


## Version history (last 1 release)

### 1.0 — 2014-06-15

No release notes.

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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 2026-08-24.*