# IFC Clash Detector > IFC Clash Detector (iPhone/iPad app by Jamie Ward.) - Source: https://appshunter.io/ios/app/ifc-clash-detector/id6760903916 (this page in markdown: same URL + `.md`) - Developer: [Jamie Ward](https://appshunter.io/developer/1870821825) - Category: Utilities - Price: $1.99 - Age rating: 4+ - Requires: iOS 17.0 · 24 MB - Released: 2026-03-24 - Data updated: 2026-08-19 - User reviews in markdown: https://appshunter.io/ios/app/ifc-clash-detector/id6760903916/reviews.md ## What is IFC Clash Detector? IFC Clash Detector helps BIM teams find, review, and report clashes across IFC models with a clean, focused workflow. Import multiple IFC models, run clash detection, review results in 3D, and triage each clash as Pending, Approved, or Issue Tracker. When you are ready, export tracked issues as BCF and generate PDF reports for coordination and sign-off. Key features: • Import and review multiple IFC models in one project • Run clash detection using enabled coordination rules • Group clashes by clash type for faster review • Review clashes in 3D and capture clash snapshots • Track issues with title, assignee, notes, and references • Export Issue Tracker items to BCF (.bcfzip) • Export and print PDF clash resolution reports • Shared workflow across iPhone, iPad, and Mac Designed for practical BIM coordination with no unnecessary setup. ## Version history (last 5 releases) ### 2.3 — 2026-08-09 IFC Clash Detector V2.3 adds Distance & Clearance Checking, expanding the app beyond hard clash detection. What’s new: • New Clearance Check workflow for finding objects that are too close together without physically intersecting. • User-defined clearance thresholds with clear measured gap, required clearance and shortfall values. • New Manual Distance mode for selecting two IFC objects and measuring the closest surface-to-surface distance. • Measurement line visualisation in the 3D view, showing the closest points between selected objects. • Set A / Set B filtering to focus checks between specific model groups or IFC entity types. • Clearance presets for repeatable coordination checks. • Results can be sorted and reviewed by smallest clearance. • Clearance findings can now be included in BCF and PDF reports. • Improved handling of broad clearance checks, with clearer warnings when a check is too large and needs narrowing. • Existing hard clash detection, shared-basis coordination, That Open fast loading and snapshot-backed exports are preserved. • Continued iPhone, iPad and native macOS stability improvements. Clearance measurements are based on the IFC geometry available to the coordination renderer and are intended for BIM coordination review. ### 2.2 — 2026-08-04 IFC Clash Detector V2.2 focuses on faster IFC loading, better model coordination and a more reliable clash review workflow. What’s new: • Faster IFC loading in the That Open engine, with models appearing sooner during import. • Much quicker cached reloads for previously opened IFC models. • That Open is now the default engine, with Classic still available in Settings as a fallback. • Improved shared-basis coordinate alignment for federated IFC models, helping coordinated ARCH and STRUCTURAL files align correctly. • Improved IFC file validation before loading, catching empty, malformed or provider-error files earlier. • Improved handling of app-owned IFC copies before model registration. • Continued improvements to Loaded Models visibility, model coordination checks and clash review. • BCF and PDF export reliability improvements, including stronger snapshot-backed export handling. • Native macOS, iPhone and iPad build improvements. • No standalone paywall or in-app purchase — all IFC Clash Detector features remain available in the app. • General stability, import, cache and runtime improvements. ### 2.1 — 2026-07-08 IFC Clash Detector V2.1 is a major engine, coordination, workflow and AI update. What’s new: • New That Open-based IFC viewing and clash workflow. • Shared-basis coordinate alignment for federated IFC models, improving alignment of coordinated ARCH and STRUCTURAL files. • New Loaded Models panel with visibility controls to help inspect and verify model alignment. • Classic engine remains available in Settings as a fallback. • Improved clash workflow with clearer model loading, ruleset selection, progress, review and export steps. • New ruleset options including Navisworks-style, Solibri-style and user-defined rule workflows. • Improved long-running clash progress with clearer stages and elapsed time. • BCF and PDF export improvements, including stronger snapshot handling. • New local, evidence-led AI assistance for model summaries, clash summaries, selected clash explanations and draft BCF issue text. • Improved delete/re-import handling to reduce stale clash, review, export and AI state. • Improved native macOS support, including a deterministic model-order stabilizer for sensitive IFC pairs. • Updated IFC Viewer-family visual styling and cleaner iPhone, iPad and macOS layouts. • No standalone in-app purchase or paywall — all Clash Detector features are available in the app. • General stability, import, cache and runtime improvements. ### 2.0 — 2026-06-29 IFC Clash Detector V2.0 is a major engine and workflow upgrade. What’s new: • New That Open-based IFC viewing and clash workflow for faster, more modern model handling. • Classic engine remains available in Settings as a fallback. • Redesigned clash workflow with clearer model selection, ruleset selection, progress, review, and export steps. • New ruleset options including Navisworks-style, Solibri-style, and user-defined rule workflows. • Improved long-running clash progress with clearer stages and elapsed time. • BCF and PDF export improvements, including stronger snapshot handling. • New local, evidence-led AI assistance for model summaries, clash summaries, selected clash explanations, and draft BCF issue text. • New IFC Viewer-family visual design, updated app logo, and cleaner iPhone/iPad/macOS layouts. • No standalone in-app purchase or paywall — all Clash Detector features are available in the app. • Improved delete/re-import handling to reduce stale clash, review, export, and AI state. • Native macOS support improved, including a deterministic conversion-order stabilizer for sensitive model pairs. • Demo/sample project loading has moved to Settings and now asks before replacing imported models. Internal validation notes: This build is intended for internal TestFlight validation. Please test IFC import, 3D viewing, clash detection, clash review, BCF export, PDF export, AI summaries, and delete/re-import. On macOS, please report any model pair that stalls during conversion or clash processing, including model names, file order, elapsed time, and engine used. ### 1.0 — 2026-03-24 No release notes. ## More apps by Jamie Ward - [UK Mortgage Planner](https://appshunter.io/ios/app/uk-mortgage-planner/id6758092403) - [Tube Notching Templates](https://appshunter.io/ios/app/tube-notching-templates/id6758341911) - [IFC COBie Updater](https://appshunter.io/ios/app/ifc-cobie-updater/id6758787077) - [IFC Viewer](https://appshunter.io/ios/app/ifc-viewer/id6758959860) - [DictaNote](https://appshunter.io/ios/app/dictanote/id6759176055) - [Booster Countdown](https://appshunter.io/ios/app/booster-countdown/id6759227631) All apps by Jamie Ward: https://appshunter.io/developer/1870821825 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*