# Flange Hole Marker Calc vs ThreadChaser

The clearest difference is update cadence: ThreadChaser at every 5 days against Flange Hole Marker Calc's every 5 months. Flange Hole Marker Calc's advantage is iOS requirement (15.6 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Flange Hole Marker Calc sells 1 one-off in-app purchase and ThreadChaser sells 1 in-app purchase, starting at $2.99 per year. Whichever you choose, the download price is not the number that matters.

Flange Hole Marker Calc ships an update every 5 months, ThreadChaser every 5 days. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Flange Hole Marker Calc | ThreadChaser |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/flange-hole-marker-calc/id6757378061/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 45 MB | 2 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) | [JAMIE SAM PARTOVI](https://appshunter.io/developer/1891387720) |

## What reviewers say

### Flange Hole Marker Calc

[App page](https://appshunter.io/ios/app/flange-hole-marker-calc/id6757378061)

This engineering tool simplifies flange hole layout for professionals. It offers three calculators for accurate marking of equispaced, angled, or equivalent holes, saving time and reducing errors in fabrication and machining. Works offline.

**Highlights:** Equispaced Hole Calculator, Holes at Any Angle Calculator, Equivalent Holes Calculator, Improves accuracy, Saves time, Easy-to-use interface, Offline functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $9.99 | one-time |


### ThreadChaser

[App page](https://appshunter.io/ios/app/threadchaser/id6761772249)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThreadChaser Pro | $2.99 | per year |


## Frequently asked questions

### Is Flange Hole Marker Calc free?

Flange Hole Marker Calc is free to download, with in-app purchases available.

### Is ThreadChaser free?

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

### Do Flange Hole Marker Calc or ThreadChaser have ads?

Neither Flange Hole Marker Calc nor ThreadChaser shows ads.

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

Flange Hole Marker Calc ships an update every 5 months, and ThreadChaser every 5 days. Most recently, Flange Hole Marker Calc was updated on October 7, 2026 and ThreadChaser on October 18, 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.*