Caddis: DWG & CAD Viewer
Measure & mark up DXF, STL, 3D
About
Quickly open, review, and mark up CAD drawings and 3D models directly on your device. This private, offline tool allows for precise measurements and annotations without needing an account or cloud upload.
What's New in Caddis
1.1.0
October 20, 2026
• True-to-scale measurements: Caddis reads the units saved in DWG, DXF, STEP and IFC files. For files without units, choose them once or calibrate by tapping a line of known length — Caddis remembers it for each file. Centimeters are now a display option. • Markups stay on the drawing: rectangles, clouds and arrows are placed with two taps and move with the drawing as you pan, zoom and rotate, in 2D and 3D. Notes are pins, and exports match what you see. • Home Screen widgets: add Recent drawing or Pinned drawings to jump straight back into a file. • More reliable saving: annotations, saved views and scales are kept across relaunches and updates, and 3D models reopen where you left them. • Improvements and fixes.
MoreFAQ
What file formats does Caddis support?
Caddis supports a wide range of formats including DWG, DXF for 2D drawings, and STL, OBJ, PLY, STEP, IFC, and SolidWorks files for 3D models. Coverage may vary by file version and exporter.
Can I edit CAD files with Caddis?
Caddis is designed as a viewing, measuring, and markup tool, not a CAD editor. It allows you to review and annotate existing files but does not offer editing capabilities for the source geometry.
Is Caddis available on Android devices?
Currently, Caddis is available for iPhone and iPad, as indicated by its supported devices. There is no information provided about an Android version at this time.
How does Caddis ensure user privacy?
Caddis prioritizes privacy by not requiring an account or cloud upload. Files are processed directly on your device, and only anonymous diagnostics are used to improve compatibility and reliability.
Does Caddis have ads?
No, Caddis is ad-free. The app description explicitly states 'no ads or account,' ensuring an uninterrupted user experience.
How frequently is Caddis updated?
The latest version is 1.1.0, which was last updated on October 20, 2026. This indicates a recent update, suggesting ongoing development and support.
What are the measurement units available in Caddis?
Caddis offers flexibility in measurement units, allowing you to display dimensions in feet, feet and inches, inches, US survey feet, meters, or millimeters.
Can I share my markups from Caddis?
Yes, you can share your review by exporting the current view as a PNG, the original file, or a portable annotation JSON. This allows for easy collaboration and communication of your feedback.
