• Improved task handling during startup, when opening models in succession, and when cancelling operations for more stable model loading. • Reduced memory usage during large file exports and improved saving and sharing. • File import and export on iPhone / iPad: confirmation is required above 50 MiB; operations are blocked above 100 MiB. • File import and export on Mac: confirmation is required above 100 MiB; operations are blocked above 200 MiB.

STEP File Viewer 1.1.0 brings a redesigned interface: viewing, measuring, reviewing and exporting STEP / STP / IGES 3D models on iPhone, iPad and Mac is now smoother. Redesigned interface • A two-row toolbar; on larger screens the main tools are labeled: Open, Notes, Measure, Section, Explode, 2D views, Export • Improved Dark Mode: menus, the sidebar and dialogs follow the system appearance; alerts now use the app's own style • The start screen opens a model or a recent file directly, and loading shows clear progress • Section, Explode, 2D views and other modes show their status at the bottom; tap × or press Esc to leave them • The top menu bar stays visible, and Share, Guide and more now live in the More menu; features that need unlocking are marked PRO Fixes and refinements • Exporting to STL, OBJ, glTF, GLB or USDZ restores the complete solid model first: section cuts, 2D views, exploded layouts and measurement markers no longer end up in the file, so exports open correctly in other apps • Export and import Review Notes backups to move notes between iPhone, iPad and Mac; an import previews the changes first, and an older backup never overwrites newer edits (unlocked together with review report export) • Mac: opening a model from recent files works again, and clicking empty space clears the selection; keyboard shortcuts include ⌘O to open, G to toggle the grid and D for model details • The Measure, Review Notes and exploded-parts panels no longer overlap • Point to Point and Point to Plane measurements no longer create 0-distance records

- New Review Notes: pin a note to a face or a part to record what needs a second look, and jump straight back to that view any time. - Selecting a note highlights the part it belongs to and rings the exact spot, so it is instantly clear what the note refers to. - Export a review report as PDF: every note comes with a screenshot from its own viewpoint, ready for design reviews, records and handover (subscription feature). - Notes are saved automatically and come back when you reopen the same model; you can also export a backup file to move them between devices. - On Mac, the app now runs in a single main window: no more stray duplicate windows, and closing the window quits the app instead of leaving it running in the Dock. - Reduced memory use on large models, so opening several models in a row stays stable.

- Improved model zoom control for smoother mouse wheel and trackpad zooming, making view adjustments more precise. - Improved the recent files list with quick filename filtering and a clearer Clear All action. - Improved STEP file compatibility, fixing some models that failed to load or showed abnormal faces and holes.

- View orientation has been optimized for the Z-up convention commonly used in industrial and mechanical CAD. - The bottom-right ViewCube has been further improved, keeping standard views, rotate, roll, and reset actions in sync with the model view.

- Added exploded-parts faceted STEP export — save each exploded part as a separate STEP file, with batch export to a single folder - Added an explosion radius slider (1×–20×) to the exploded-parts panel - Replaced the corner view helper with a new view cube — tap faces for front, top, side, and other standard views; use the surrounding buttons to rotate and roll the model

- Added per-file deletion in the recent files list, plus confirmed clear-all when the list gets longer, making import history easier to manage - Improved STEP color loading, including XCAF, instance, face-level, and subshape colors, reducing gray or mismatched colors in colored models - Improved view reset: tap the quick action icon to return directly to the default view without an extra confirmation prompt

- New hole feature auto-detection and measurement — scan all circular holes in the model with one tap, with quick diameter/radius annotation - New bounding box measurement — automatically calculate length, width, height, and volume of parts or assemblies - New assembly part recognition scan — measure part bounding box dimensions with one tap - Exploded view now supports exporting selected parts to separate files; the part list panel allows quick switching and locating of part views - Improved measurement focus camera — one tap to auto-adapt to the optimal viewing angle - Exploded view measurement rules now restrict measurements to within the same part, preventing cross-part annotation misalignment - New PMI/GD&T information browser panel (located in the sidebar's Model tab), supporting filtering by type, source, and confidence level to explore product manufacturing information

- Optimize PMI annotations in the view - Optimize prompt messages during measurement operations, and automatically capture measurement targets - Add new distance measurement types: Point-to-Face, Line-to-Face, and Face-to-Face

- Fixed a bug that could cause issues when importing certain 3D models directly - Added support for PMI annotations, dimension details, and model information panels in AP242 models for easier inspection - Added measurement tools with point-to-point, diameter/radius, and angle measurement - Better stability when opening complex or larger files, including recovery for some files that previously failed to load - Improved iPhone and iPad interactions to make focusing and measuring feel more natural

- Added localization support: German, French, Simplified Chinese, Japanese - Some UI optimizations

- Added support for opening recently accessed STEP files - Fixed bugs related to the position and color of parts when loading some assembly models - Improved model loading speed and stability - Optimized the app logo style

- The user interface has been optimized to match the aesthetic of iOS and macOS 26. - Updated Privacy Policy and Support documents for better readability via web-based viewing. - Faster startup: Replaced blocking animations to enable instant, hands-free app launching.

- Supports loading IGES/IGS models. - Supports parsing and loading STEP models as assemblies (the model must contain assembly information). - Supports exploding model components, spreading them apart for detailed inspection.

- Improved app launch time. - Improved STEP file loading speed and stability.

- Adds customizable background colors, with your choice saved and restored automatically every time you return. - Refines the menu bar and shortcuts: more fluid, smarter, and collapsible — giving the 3D view the space it deserves. - Introduces crisp cross-section planes (XY, XZ, YZ): slice through geometry cleanly and expose the true anatomy within.