STEP File Viewer vs Reality Prep Preview

STEP File Viewer is a lightweight yet powerful tool for viewing .step and .stp files on macOS, iPad, and iPhone. Key Features • View STEP models in 3D with rotate, pan, and zoom controls using perspective projection. • Display 3D models in solid, shaded, or wireframe modes. • Load and view IGES/IGS models. • Supports assembly-level colors and exploded views (requires the model to include assembly data). • Parse and load STEP models as assemblies • Support PMI annotations, dimension details, and model information panels in AP242 models for easier design review. • Measure auto-detected hole features, bounding box dimensions, point-to-point distances, diameter/radius, and angles to verify key dimensions more quickly. • Pin review notes on the model to record issues, jump back to each note’s viewpoint, and export a review report as PDF with screenshots. • Apply axis-aligned section planes (XY, XZ, YZ) to reveal the model’s internal geometry. • Explode model components to inspect the parts clearly in expanded space, with the ability to export selected parts as separate files. • Export 3D models in STL, OBJ, glTF, GLB, or USDZ formats for further use or sharing. • Capture high-quality viewport screenshots for easy sharing. • No ads. No tracking. No data collection. Just a clean, efficient tool built for productivity. The STEP format (ISO 10303) is widely supported by 3D CAD, CAM, CAE, and PLM applications. Recommended For: • Engineers & Designers: Review designs on the shop floor or during client meetings. • Machinists & CNC Operators: Quickly verify part geometry before production. • 3D Printing Enthusiasts: Easily convert professional STEP files to STL for slicing. • Students & Educators: Visualize complex structures without expensive CAD licenses. Pricing & Access • Free: Load and view unlimited STEP models. • Subscription: Unlimited access to all features. A single subscription covers macOS, iPhone, and iPad. • Individual Unlocks: Get exactly what you need with one-time purchases for specific features—no subscription required. • Payment is charged to your App Store account. • Auto-renews unless turned off at least 24 hours before the current period ends. • Manage your subscriptions in the App Store settings. Privacy & Purchase Terms • Privacy Policy: https://apps.h53d.xyz/apps/step-file-viewer/policy.html • Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Have questions or need support? Reach out to danjian42@gmail.com.

Preview animated USDZ assets on iPhone and iPad, inspect 3D content at authored real-world scale in augmented reality, and capture device-validation evidence. Reality Prep Preview helps developers, 3D artists and spatial-computing teams test how their USDZ assets behave on Apple devices. It also complements Reality Prep Pro for Mac, connecting asset preparation with device-side verification. ANIMATED USDZ PREVIEW • Import USDZ files directly from Files • Play supported embedded animations • Inspect static and animated 3D assets • Review asset dimensions and file information TRUE-SCALE AUGMENTED REALITY • Preserve the asset's authored real-world scale • Reposition, rotate and reset placed content • Inspect spatial assets in context DEVICE CHECKS AND REPORTING • Review available device-side performance observations • Inspect loading and rendering information • Export structured JSON validation evidence • Share device findings with your development workflow WORKS WITH REALITY PREP PRO Reality Prep Pro 3.0 prepares and validates 3D assets on Mac, including animated FBX, GLB and glTF sources. Open the resulting USDZ in Reality Prep Preview, inspect it on your device, then export JSON evidence for import into Prep Pro. This connects Mac preparation with device testing and helps identify assets that require re-verification after changes. LOCAL AND STRAIGHTFORWARD Import local USDZ files without creating an account. Your original assets remain unchanged. Reality Prep Preview is a companion to Reality Prep Pro, which is available separately for Mac.