TechTec is a free iPhone app developed by Sebastian Kopp. It falls under the category of Utilities & Tools, providing a range of useful features for various technical calculations and reference purposes.

With TechTec, users can easily and quickly:

• Calculate all fitting dimensions
• Access general tolerances for lengths, angles, and radii
• Look up form and positional tolerances
• Find thread dimensions for all common threads
• Discover G- and M-codes for turning/milling machines

TechTec aims to be a comprehensive tool for professionals and enthusiasts alike. It offers a user-friendly interface and provides accurate and relevant information for a variety of technical needs. The app is constantly updated, promising even more helpful features in the future.

For anyone seeking a versatile utilities and tools app, TechTec is a valuable addition to their iPhone.