Comparison

G vs G

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

G

This app provides CNC machinists with offline access to G-code references, calculators, and lessons. It includes a code editor with syntax highlighting and safety checks, a speeds & feeds calculator, and a trigonometry solver. Users can also access a tooling library and a learning path with quizzes and challenges.

Highlights
  • Offline G-code and M-code reference
  • Code editor with syntax highlighting and safety checks
  • Speeds & feeds calculator
  • Trigonometry calculator
  • Tooling library
  • Structured learning path with quizzes
  • AI-powered code scanning and analysis
Features
Read full description

REFERENCE - 142 G-Code and M-Code entries with descriptions, examples, and usage notes - 7 controllers: Fanuc, Haas, Siemens, Mazak, Okuma, Grbl, Marlin - Search, filter by category, and save favorites for quick access CODE EDITOR - Syntax highlighting for G-Code with line numbers - Real-time validation for mills, lathes, and 3D printers catches errors before your machine does - Recognizes what kind of program you are writing and suggests the right machine type - Safety checks: spindle, tool length comp, safe Z, constant surface speed limits, feed modes, program endings - Safe code templates for mill and lathe headers, tool changes, cycles, and endings - Export programs as .nc files, ready for the controller SPEEDS & FEEDS - Milling: RPM, feed rate, chip load, material removal rate, radial chip thinning - Turning: RPM from the workpiece diameter, feed per revolution, theoretical finish, cutting and facing time, and a ready-to-paste G96 block - Materials: aluminum, steel, stainless, titanium, nickel alloys, hardened steel, cast iron, brass, plastics, composites - Speeds for HSS, carbide, ceramic, CBN, and PCD tooling - Save favorite calculation presets HOLEMAKING AND THREADING - Drilling: point length, through-hole depth, peck cycle, derating - Tapping: tap drill size, thread engagement, rigid and floating feeds - Thread milling with feed compensation and per-pass feeds - Lathe threading with a full pass plan and G76 and G92 programs TRIGONOMETRY AND CIRCLES - Right triangle solver, bolt circle generator, taper and angle calculations with lathe X and Z values - Circle G-Code generator with arc and helical output MACHINIST'S HANDBOOK - Cutting tools, inserts (CNMG, WNMG, DNMG, and more), and thread specs (UNC, UNF, Metric, NPT, BSP) - Tool holders: CAT, BT, HSK, ER collets, Morse taper, ISO turning holders with a designation decoder, VDI and BMT turrets - 384 drill sizes with tap drill and clearance hole charts - ISO 286 fits and tolerances, hardness conversion, surface finish - GD&T symbols and modifiers - 164 controller alarm codes with likely causes and what to check LEARNING PATH - 55 structured lessons across 11 modules - 163 quiz questions with immediate feedback - 15 interactive code challenges with validation - Topics: fundamentals, motion, tool management, M-codes, safety, macro programming, multi-axis, lathe, 3D printing - Track your progress and bookmark lessons KNOWLEDGE BASE - 43 in-depth articles on chip load, surface speed, tool materials, turning, threading, formulas, and best practices, linked from the calculators that use them SCAN & ANALYZE - Point your camera at a machine screen or printed program - On-device OCR extracts the G-Code - AI-powered analysis explains what the program does step by step - Safety assessment flags missing safety blocks and risky moves - Import scanned code into the editor BUILT FOR THE SHOP FLOOR - 100% offline - no internet required - Dark industrial theme, designed for iOS 26 - Works on iPhone and iPad G-Code Guru Pro unlocks the full toolkit: all 11 learning modules, unlimited saves, the complete Handbook, the Knowledge Base, calculation presets, the tapping, thread milling and lathe threading calculators, code scanning analysis, and every future update. Privacy Policy: https://gcodeguru.app/privacy Terms of Use: https://gcodeguru.app/terms

About

G

Features
Read full description

This app helps you learn G codes based on the command you are using !

Screenshots

G4 screens
G3 screens

Verdict

The call

The clearest difference is in-app purchases: G at none against G's 2. G also leads on update cadence (every 8 days vs every 3 weeks) and iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. G sells 2 in-app purchases, starting at $24.99 per year. G asks for nothing beyond the download.

UpkeepUpdate frequency

G ships an update every 3 weeks, G every 8 days. Both last shipped on November 5, 2026.

Scorecard3 real differences · 6 level
G versus G: the parameters behind the verdict, then further details
ParameterGG
PriceFreeFree
Rating4.9 (15 ratings) — better—
Number of ratings15 — better—
Update frequencyEvery 3 weeksEvery 8 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS26.017.0 — better
Further details — not scored
Size40 MB2 MB
Age rating4+4+
DeveloperPawel DembskiNoam Durgnat (CH)

In-app purchases

2 purchases

G

Subscriptions1
  • Pro Annual$24.991 Year
One-time1
  • G-Code Guru Pro$69.99
None

G

No in-app purchases

Questions

Is G free?
G is free to download, with in-app purchases available.
Is G free?
G is free to download, with no in-app purchases.
Do G or G have ads?
Neither G nor G shows ads.
Which is updated more often, G or G?
G ships an update every 3 weeks, and G every 8 days. Most recently, G was updated on November 5, 2026 and G on November 5, 2026.

Other comparisons