Zargy is a free iPhone app developed by Beschlage Koch GmbH, designed to assist in measuring doors and frames accurately. The app aims to simplify the measurement process and sharing of measurements with project leaders, colleagues, suppliers, or architects. Zargy integrates measurement routines into project management to minimize human errors effectively.

The app offers features such as faster and more precise measurements, supporting Bluetooth measuring devices like Bosch and Stabila. It allows users to document measurements easily and securely on-site, including the ability to create videos, photos, scans of documents, and audio recordings. Zargy also enables quick sharing of project data as Excel or PDF files, streamlining the sharing process and eliminating manual data entry.