# CNC Machinist Tools — CNC, G-Code & Shop Calculators

> CNC, G-Code & Shop Calculators (iPhone/iPad app by 文军 崔.)

- Source: https://appshunter.io/ios/app/cnc-machinist-tools/id6809691445 (this page in markdown: same URL + `.md`)
- Developer: [文军 崔](https://appshunter.io/developer/6792011485)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-09-09
- Data updated: 2026-10-08
- User reviews in markdown: https://appshunter.io/ios/app/cnc-machinist-tools/id6809691445/reviews.md

## What is CNC Machinist Tools?

CNC Machinist Tools is an offline machining toolkit for machinists, CNC operators, students and workshop use.

Quickly calculate machining parameters, inspect local G-code files, preview 2D toolpaths, solve thread geometry, generate bolt-circle coordinates and handle common shop calculations — all directly on your iPhone.

Speeds & Feeds

Calculate RPM and feed rate for:

Milling
Turning
Drilling
Metric and imperial units

Enter your own cutting parameters and get clear, repeatable results.

G-Code Viewer

Open local .nc, .gcode, .ngc, .tap and .txt files.

Read G-code with line numbers
Search and jump to source lines
View parsing diagnostics and program summaries
Preview supported toolpaths in XY, XZ and YZ views
Zoom, pan, fit and inspect toolpath-to-source mapping

G-code viewing is read-only and intended for inspection and reference.

Thread Calculator

Calculate theoretical thread geometry for:

ISO Metric
Unified Inch
Pitch / TPI
Multi-start threads

Pro unlocks additional theoretical thread dimensions and formula details.

Tap Drill

Calculate theoretical cutting-tap drill diameters using metric or imperial inputs and configurable thread engagement.

Bolt Circle

Generate X/Y hole coordinates from:

Pitch circle diameter
Hole count
Start angle
Center position
Rotation direction

Copy calculated coordinates for use elsewhere.

Taper

Calculate taper dimensions, taper per unit length, half-angle and included angle, or solve for an unknown dimension.

More Workshop Tools

Drill Size Converter
Unit Converter
Metal Weight Calculator
History
Favorites
Machine Profiles
Machine Limits
Formula Details

Metric & Imperial

Work comfortably in either measurement system, including fractional-inch display where appropriate.

Lifetime Pro

Unlock:

Tap Drill
Metal Weight
Machine Profiles & Limits
Advanced Thread Details
Formula Details
Favorites
Unlimited History

One-time purchase. No subscription.

CNC Machinist Tools performs calculations locally and is designed as a reference and productivity tool for machining work.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | $7.99 | one-time |



## Version history (last 2 releases)

### 1.1 — 2026-09-12

New local G-code viewer for NC, GCODE, NGC, TAP and TXT files
• New 2D toolpath preview with XY, XZ and YZ views
• Added visual diagrams for Thread, Tap Drill, Bolt Circle and Taper calculations
• Improved numeric input with easier focus, Next/Done keyboard navigation and clearer placeholders
• New CNC Machinist Tools app icon
• Performance and usability improvements

### 1.0 — 2026-09-10

No release notes.

## More apps by 文军 崔

- [SB3 File Opener & Player](https://appshunter.io/ios/app/sb3-file-opener-and-player/id6792155835)
- [JAR DLL EXE File Viewer](https://appshunter.io/ios/app/jar-dll-exe-file-viewer/id6792224147)
- [FIT File Viewer & Repair](https://appshunter.io/ios/app/fit-file-viewer-and-repair/id6807238567)

All apps by 文军 崔: https://appshunter.io/developer/6792011485

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*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 2026-10-08.*