# G Code Generator CNC OD ID vs i

The clearest difference is price: i at Free against G Code Generator CNC OD ID's $3.99. G Code Generator CNC OD ID's advantage is rating (3.9 vs 2.6) and update cadence (every 3 weeks vs every 13 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

i is free to download; G Code Generator CNC OD ID costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

G Code Generator CNC OD ID holds the better App Store score, 3.9 against 2.6. Both are backed by a comparable volume of ratings — 19 and 9 respectively. Written reviews point the same way: 63% of G Code Generator CNC OD ID's written reviews are positive against 33% of i's.

G Code Generator CNC OD ID ships an update every 3 weeks, i every 13 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | G Code Generator CNC OD ID | i |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[3.9 (19 ratings)](https://appshunter.io/ios/app/g-code-generator-cnc-od-id/id1081603013/reviews)** | [2.6 (9 ratings)](https://appshunter.io/ios/app/i-machinist/id1456473668/reviews) |
| Number of ratings | **19** | 9 |
| Positive reviews | **62.5% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 13 months |
| Monetization | Free | Free |
| Size | 19 MB | 8 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [ilan TETRUASHVILI](https://appshunter.io/developer/940821251) |

## What reviewers say

### G Code Generator CNC OD ID

[App page](https://appshunter.io/ios/app/g-code-generator-cnc-od-id/id1081603013)

This utility app simplifies CNC G-code generation for various OD and ID machining tasks. Input numerical values to quickly create codes for angles, radii, chamfers, and more. Easily copy, email, or screenshot your generated G-codes.

**Highlights:** Generate G-codes for OD machining, Generate G-codes for ID machining, Input numerical values for calculations, Supports angle and radius conversions, Handles chamfer and step operations, Copy G-codes to clipboard, Email generated G-codes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### i

[App page](https://appshunter.io/ios/app/i-machinist/id1456473668)

This utility app assists machinists with CNC calculations, including cutting speed, RPM, and feed rate. It also provides databases for hole and shaft tolerances, as well as detailed thread specifications.

**Highlights:** Cutting speed calculation, RPM calculation, Feed rate calculation, Hole and shaft tolerance database, Thread data, Milling, drilling, and turning operations

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is G Code Generator CNC OD ID free?

G Code Generator CNC OD ID costs $3.99, with no in-app purchases.

### Is i free?

i is free to download, with no in-app purchases.

### Which has better reviews, G Code Generator CNC OD ID or i?

G Code Generator CNC OD ID is rated higher. G Code Generator CNC OD ID averages 3.9 out of 5 from 19 ratings, while i averages 2.6 from 9 ratings.

### Do G Code Generator CNC OD ID or i have ads?

Neither G Code Generator CNC OD ID nor i shows ads.

### Which is updated more often, G Code Generator CNC OD ID or i?

G Code Generator CNC OD ID ships an update every 3 weeks, and i every 13 months. Most recently, G Code Generator CNC OD ID was updated on October 24, 2026 and i on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*