# Flange Hole Marker vs G

The clearest difference is price: G at Free against Flange Hole Marker's $1.99. G also leads on update cadence (every 6 weeks vs every 55 months). Flange Hole Marker's advantage is in-app purchases (none vs 8) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

G is free to download; Flange Hole Marker costs $1.99 up front. G sells 8 in-app purchases, starting at $1.99 per 7 days. Flange Hole Marker asks for nothing beyond the download.

Flange Hole Marker ships an update every 55 months, G every 6 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Flange Hole Marker | G |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/g-code-generator-cnc-and-laser/id6754815495/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 55 months | **Every 6 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 95 MB |
| Requires iOS | **16.1** | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [Omer Faruk BAGCI](https://appshunter.io/developer/1850264269) |

## What reviewers say

### Flange Hole Marker

[App page](https://appshunter.io/ios/app/flange-hole-marker/id1490671993)

Calculate the cord length needed to mark holes on a flange's pitch circle diameter. Ideal for fabrication professionals, this tool simplifies bolt hole marking on various industrial equipment.

**Highlights:** Hole center marking on flange, Calculates cord length for hole division, Uses Pitch Circle Diameter (PCD) or Bolt Hole Circle Diameter (BCD), Supports fabrication of process equipment, Simplifies bolt hole marking

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

**In-app purchases:** none


### G

[App page](https://appshunter.io/ios/app/g-code-generator-cnc-and-laser/id6754815495)

Transform images into high-quality G-Code for CNC machines, laser engravers, and plotters. Offers advanced controls for precise output and easy sharing. Ideal for makers and professionals.

**Highlights:** Image to G-Code conversion, Advanced parameter controls, High-precision output, Export and share G-Code, Fast and easy to use

**Features:** iPhone Duo support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GCode Weekly | $1.99 | per 7 days |
| GCode Monthly | $4.99 | per month |
| GCode Pro Weekly | $5.99 | per 7 days |
| GCode Pro Monthly | $14.99 | per month |
| G-Code Pro Yearly | $42.99 | per year |
| 15 Credits | $4.99 | one-time |
| 30 Credits | $9.99 | one-time |
| 50 Credits | $14.99 | one-time |


## Frequently asked questions

### Is Flange Hole Marker free?

Flange Hole Marker costs $1.99, with no in-app purchases.

### Is G free?

G is free to download, with in-app purchases available.

### Do Flange Hole Marker or G have ads?

G shows ads; Flange Hole Marker does not.

### Which is updated more often, Flange Hole Marker or G?

Flange Hole Marker ships an update every 55 months, and G every 6 weeks. Most recently, Flange Hole Marker was updated on November 3, 2026 and G on November 5, 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.*