# ZHCODE vs Flange Hole Marker

The clearest difference is price: ZHCODE at Free against Flange Hole Marker's $1.99. ZHCODE also leads on update cadence (every 2 months vs every 55 months) and iOS requirement (9.3 vs 16.1). On ads, in-app purchases and device support there is nothing between them.

ZHCODE is free to download; Flange Hole Marker costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ZHCODE ships an update every 2 months, Flange Hole Marker every 55 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ZHCODE | Flange Hole Marker |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 55 months |
| Monetization | — | Paid |
| Size | 43 MB | 2 MB |
| Requires iOS | **9.3** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jutone Electronic Co., Ltd.](https://appshunter.io/developer/1049199715) | [Imran Pinjara](https://appshunter.io/developer/1484488781) |

## What reviewers say

### ZHCODE

[App page](https://appshunter.io/ios/app/zhcode/id1049199717)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ZHCODE free?

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

### Is Flange Hole Marker free?

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

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

Neither ZHCODE nor Flange Hole Marker shows ads.

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

ZHCODE ships an update every 2 months, and Flange Hole Marker every 55 months. Most recently, ZHCODE was updated on November 2, 2026 and Flange Hole Marker on November 3, 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.*