# GTK-Field

> Geotechnische Feldversuche

Canonical page: [https://chrome-stats.com/d/id6760727960](https://chrome-stats.com/d/id6760727960)

## Overview

- **ID:** `id6760727960`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Matthias Kroell
- **Category:** Utilities
- **Version:** 1.8.2
- **Last updated:** 2026-09-11
- **First published:** 2026-03-27
- **Size:** 6.51 MB
- **Data as of:** 2026-09-12
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/gtk-field/id6760727960)
- **Website:** [https://www.gtk-field.app](https://www.gtk-field.app/)
- **Privacy policy:** [https://www.geotechnik-kroell.com/datenschutz-gtkfield](https://www.geotechnik-kroell.com/datenschutz-gtkfield)

## Description

New: full soil names and secondary constituents in the log, depths as
staff readings throughout, four photos per page with full-page
overview.

GTK Field - The Field. Digital.
Professional geotechnical documentation on site. Standard-compliant, fast, paperless.
GTK Field is the app for geotechnical engineers who want to record field data to standard and export it as a PDF straight away - no office, no rework.
MODULES
TRIAL PIT
Classify and record soil layers to EN ISO 14688-1/2. 30+ soil types with BGR colours and DIN 4023 hatching. Dual-chip system for secondary constituents with intensity (slightly/very). Scaled layer profile with automatic groundwater placement in the PDF.
CORE PROBING (RKS)
Record core layers to EN ISO 22475-1 with core recovery, drilling progress and remarks per layer. Layer log with DIN 4023 hatching in full colour, groundwater symbols and an automatic legend in a multi-page PDF.
DYNAMIC PROBING
Record N10 values and watch the resistance profile build up live, colour-coded to EN ISO 22476-2. Five probe types: DPL, DPM, DPH, DPSH-A and DPSH-B. Cone resistance qd is calculated with the rod factor to EN ISO 22476-2 Annex E, that is, with the depth-dependent rod mass. Groundwater line in the diagram. Multi-page PDF with blow-count table, resistance diagram and the calculation basis stated.
PARTICLE SIZE ANALYSIS
Enter sieve residues using the AT/DE sieve series with EN standard limits marked. Automatic grading curve, size fractions, d10/d30/d60 with Cu and Cc, frost criterion after Casagrande. Soil naming automatically to EN ISO 14688-2, test to EN ISO 17892-4.
INFILTRATION TEST
Determine the kf value in the field to OENORM B 4422-2. Pit test (simple and extended) and standpipe test (falling head, steady state, base infiltration). Automatic evaluation after Hvorslev 1951. Classification to DIN 18130-1. Water level over time chart on page 1.
SITE INSPECTION
Site inspections with traffic-light checklists (green/amber/red/n.a.), including a soil nailing module to OENORM/DIN EN 14490. Photo and remark per check item, attendance list, findings with action, deadline and responsible person. Digital signature with a freely chosen signatory on the device.
SAMPLING
Document soil samples and track them from the field to the laboratory to EN ISO 22475-1. Quality classes 1-5, all container types. Laboratory status tracking: pending, submitted, evaluated. Individual and summary records as PDF.
GENERAL RECORD
Free-form site record with text and photos. GPS coordinates captured automatically.
PDF EXPORT
All records are exported as standard-compliant PDFs with company logo, GPS coordinates, date and author. Share straight from the app by e-mail, AirDrop or cloud.
TECHNICAL
Fully usable offline, no internet needed in the field
Standard profile OENORM (AT) or DIN (DE) selectable per project
Example data for every test type, so all modules can be tried out immediately
GPS coordinates automatically (WGS84), shown in BMN or UTM
Photo documentation built in
Cloud backup via Supabase
Developed by a geotechnical engineer for geotechnical engineers, in Austria
STANDARDS
EN ISO 14688-1/2 - EN ISO 22476-2 - EN ISO 22475-1 - EN ISO 17892-4 - DIN 4023 - DIN 18130-1 - OENORM B 4422-2 - OENORM/DIN EN 14490 - OENORM EN 1997-1
FREE OF CHARGE
GTK Field is provided free of charge: all modules, any number of projects and records, no subscription and no in-app purchases.

## Rankings

- #2,028,993 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6760727960)