# iNC-Mill: CNC Editor & Sim — STP/STL Models · Cutting Sim > Portable CNC workstation for NC/G-code editing, simulation, and process calculations. (iPhone/iPad app by 乐勇 刘.) - Source: https://appshunter.io/ios/app/inc-mill-cnc-editor-and-sim/id6755829129 (this page in markdown: same URL + `.md`) - Developer: [乐勇 刘](https://appshunter.io/developer/1856258038) - Category: Utilities, Reference - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.0 · 83 MB - Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Russian, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) - Released: 2025-12-02 - Data updated: 2026-10-03 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/inc-mill-cnc-editor-and-sim/id6755829129/reviews.md ## What is iNC? Open STP/STEP and STL models, review NC/G-code, and inspect 3D toolpaths on iPhone and iPad. iNC-Mill brings model viewing, machining program review, and cutting simulation into one local workflow. File management and basic 3D viewing are free. NC editing, simulation, knowledge references, calculators, advanced 3D tools and settings, and AI questions require an active subscription. 3D PREVIEW MODES FOR EACH TASK • Standard keeps app navigation available • Machining pairs NC toolpaths with read-only code. Resize stacked or side-by-side panes, follow linked lines, and inspect available tool, feed, spindle and position details • View hides navigation and information panels to give NC, STEP/STP and STL previews more space, while keeping scene tools available • NC supports all three modes; STEP/STL models support Standard and View. Switching modes preserves the camera and playback position STP/STEP AND STL MODEL VIEWING • Rotate, zoom, and inspect models with standard views and file colors where available • Browse STEP assembly trees, hide or isolate components, and explore adjustable exploded views • Look inside models with interactive section planes and configurable section fills • Inspect STEP geometry with automatic measurements and annotations for distances, radii, angles, areas, and model dimensions • Set up reference grids and choose metric or imperial display units, automatically from your device or manually 3D TOOLPATH REVIEW • Measure between toolpath points and visible simulated workpiece surfaces • Navigate by move, Z change, cutting section, or tool section; review the active tool and associated code line where available • Play forward or in reverse, adjust speed independently of play/pause, and customize path colors, visibility, and viewing direction Model viewing is read-only. STEP measurements use CAD geometry where supported; STL and simulated workpiece measurements are mesh-based approximations. Toolpath curves use generated segments. Measurements do not certify physical part dimensions. SMART NC EDITING AND SIMULATION • Preview stock material removal during 3-axis milling playback • Open NC files from Files, AirDrop, or other apps • Use smart NC editing with syntax highlighting, line navigation, search, and replace • Long-press N to renumber or remove block numbers in selected lines or the whole file; confirm the match count before Replace All • Review very large programs in a focused read-only mode • Inspect 3-axis and 5-axis toolpaths with rapid, feed, and arc motion clearly distinguished • Visualize lathe stock changing as material is removed during turning playback • Trace FANUC macro execution flow and machine state • Organize machine and tool definitions • Browse G/M-code references and code assistance in all ten app languages • Access milling, turning and quick calculators from the sidebar with a subscription LOCAL-FIRST WORKFLOW Core NC editing, parsing, model viewing, toolpath review, and simulation run on device. Your machining files do not need to be uploaded for these tools. USE IT FOR • Shop-floor program checks before machining • On-site edits and troubleshooting • Training and toolpath review • Keeping machining references close at hand iNC-Mill supports human review and visualization. It does not replace professional verification, collision checking, or your machine, tooling, fixture, and workplace safety procedures. SUBSCRIPTIONS Monthly and yearly options, and any available trial, are shown in the App Store at purchase time. Payment is charged to your Apple ID after confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel in Settings > Apple ID > Subscriptions. Terms of Use: https://inc-mill.com/en/terms Privacy Policy: https://inc-mill.com/en/privacy ## Key features - Smart NC/G-code editing - CNC simulation - Process calculators - 3D toolpath viewer - Local-first file processing - Large program handling ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Subscribe Monthly | $1.99 | per month | | Subscribe Yearly | $17.99 | per year | ## Frequently asked questions about iNC ### What is iNC-Mill? iNC-Mill is a mobile application designed to function as a portable CNC workstation. It integrates smart NC/G-code editing, CNC simulation, and process calculators, allowing users to manage machining programs directly on their iPhone or iPad. ### Does iNC-Mill have ads? No, iNC-Mill does not contain advertisements. The application is designed with a focus on engineer-friendliness and a clean user interface, ensuring an uninterrupted experience for users. ### How does iNC-Mill handle user data and privacy? iNC-Mill operates on a local-first principle, meaning all parsing and rendering occur on the device. Machining content is not uploaded, and NC programs are not used for ads or profiling. Anonymous crash reporting is optional and does not include NC file contents. ### What are the subscription options for iNC-Mill? iNC-Mill offers both monthly and yearly subscription plans, each including a 7-day free trial. The monthly subscription is $1.99, and the yearly subscription is $17.99. Full features are available during the subscription period. ### How can I cancel my iNC-Mill subscription or free trial? Subscriptions and free trials can be managed or canceled within your device's settings. Navigate to Settings > Apple ID > Subscriptions. It's important to cancel at least 24 hours before the end of the current period to avoid automatic renewal. ### What file formats does iNC-Mill support for NC programs? iNC-Mill supports common NC program file formats, including .nc, .txt, and .gcode. The application is optimized for loading and browsing even very large programs, making it suitable for extensive CAM-generated files. ### Can iNC-Mill be used offline? Yes, iNC-Mill is designed for confidential machining and works without an internet connection. Files are processed on the device, eliminating cloud dependency and ensuring usability in environments without reliable internet access. ### What are the age restrictions for iNC-Mill? iNC-Mill has an age rating of 4+. This indicates that the content is generally suitable for all ages, with no mature themes or potentially disturbing material. ## Version history (last 5 releases) ### 1.0.18 — 2026-09-30 1.0.18: Choose the 3D preview that fits your task. • NC previews now offer Standard, Machining and View modes. STEP/STP and STL models support Standard and View. • New Machining mode pairs 3D toolpaths with read-only NC code in one workspace. Resize stacked or side-by-side panes to fit the available space. Browse syntax-colored code with fixed line numbers and navigate linked source lines where available. • A compact machining summary and expandable details show available tool, feed, spindle, position and other information alongside the toolpath. • New View mode hides the top navigation, bottom tab bar and information panels for a larger 3D viewing area, while keeping scene tools available. Switching modes preserves the camera and playback position; return to Standard at any time. • Refined NC input, scrolling, syntax highlighting, search and replace for longer programs. Fixed missed actions during rapid single replacements. • Long-press N to renumber or remove block numbers in selected lines or the whole file, with an affected-line count before applying. Confirm the match count before Replace All. Improved caret, selection and scroll-position retention after batch edits, cutting and undo. • Code assistance and knowledge references support all ten app languages, with improved reference matching for different controllers. • Restored sidebar access to milling, turning and quick calculators, available with an active subscription. • Fixed parsing of some G41/G42 cutter-compensated arcs and improved toolpath continuity. ### 1.0.17 — 2026-09-26 1.0.17: A smoother NC editing experience. • Improved typing, scrolling, syntax highlighting, search, and replace, with better responsiveness when editing longer programs. • New N block-number tools: long-press N in the keyboard toolbar to renumber or remove numbers from selected lines or the whole file, with an affected-line count before applying. • Replace All now shows the current match count for confirmation. Fixed missed actions during rapid single replacements. • Improved caret, selection, and scroll-position handling after batch edits, cutting text, and undo. • Code assistance and the knowledge base now support all ten app languages, with improved reference matching for different controllers. • Fixed parsing of some arcs with G41/G42 cutter radius compensation to improve toolpath continuity. ### 1.0.16 — 2026-09-22 1.0.16 brings STP/STEP and STL model viewing to iNC-Mill. • Open 3D models locally, inspect their shape, and view file colors where available. • Explore STEP assembly trees, hide or isolate parts, and adjust exploded views. • Inspect interiors with interactive section planes and adjustable fills. • Use automatic CAD measurements and clearer annotations; STL measurements are mesh-based approximations. • Configure reference grids and switch between automatic, metric, and imperial display units. • Measure visible simulated workpiece surfaces together with toolpaths, and see the active tool during navigation. • Keep model previews across panel changes. Rendering, section controls, measurement labels, and resource reuse have been improved. File management and basic 3D viewing remain free. NC editing, simulation, advanced 3D tools and settings, and AI questions require an active subscription. ### 1.0.15 — 2026-09-14 Version 1.0.15 brings closer toolpath inspection and more flexible playback. • New toolpath measurement: pick two points to inspect 3D distance, coordinate differences, and path length, with endpoint snapping. • Precise playback jumps: select a position directly on the toolpath to seek to it. • New tool view for inspecting path details. • Independent viewing-direction lock to keep your chosen angle. • Per-axis display scaling: adjust X/Y/Z scales separately to reveal small variations. • Reverse toolpath playback, with speed adjustment independent of play/pause. • Updated path information shows associated code lines when available for easier program review. • Fixed picking on hidden paths and missing segments in point display. Improved editor stability for bulk edits, window synchronization, and restoring the viewing position. ### 1.0.14 — 2026-09-13 1.0.14 improves 3D toolpath review and playback. Clearer toolpaths • Customize toolpath colors in display settings. • Use the new legend and optional statistics to see motion colors, counts and shares of total travel distance. • Center axes now respect depth: closer toolpaths and objects obscure axes behind them. Faster navigation • Switch playback display modes, including paths from the last G00 or tool change. • Expand five navigation groups in the playback bar: program start/end, tool sections, cutting sections, Z changes and individual moves. • Rotate, zoom and pan the 3D view using gestures over the bottom information area. More accurate status • Fixed feed F always showing 0 in the bottom readout and added spindle S values. • Cutting status stays hidden until stock is initialized. Restore Stock is disabled during playback to prevent accidental resets. • Fixed crashes in point display mode and improved arc and playback progress rendering stability. ## Apps similar to iNC | App | Rating | Price | Category | | --- | --- | --- | --- | | [CNC Machinist Calculator](https://appshunter.io/ios/app/cnc-machinist-calculator/id6605942020) | 5.0 (1) | Free | Utilities | | [GCode Scanner for CNC Machines](https://appshunter.io/ios/app/gcode-scanner-for-cnc-machines/id6747010022) | 5.0 (3) | Free | Utilities | | [MC编程师](https://appshunter.io/ios/app/mc/id6740897460) | — | Free | Utilities | | [数控车床编程-车工计算铣工加工中心](https://appshunter.io/ios/app/id6467717383) | — | Free | Utilities | | [GCode Generator](https://appshunter.io/ios/app/gcode-generator/id6754815495) | 5.0 (1) | Free | Utilities | | [Machining Calculators](https://appshunter.io/ios/app/machining-calculators/id6740812774) | — | Free | Utilities | ## More apps by 乐勇 刘 - [iScanKit: Offline Scanner](https://appshunter.io/ios/app/iscankit-offline-scanner/id6757918728) - [BreedClarity: Dog Guide](https://appshunter.io/ios/app/breedclarity-dog-guide/id6791543445) - [BreedClarity: Cat Guide](https://appshunter.io/ios/app/breedclarity-cat-guide/id6794185057) All apps by 乐勇 刘: https://appshunter.io/developer/1856258038 ## Related topics [cnc milling](https://appshunter.io/ios/topics/cnc-milling) · [cnc](https://appshunter.io/ios/topics/cnc) --- *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 2026-10-03.*