# Helix Angle Calculator vs ThreadChaser

The clearest difference is in-app purchases: Helix Angle Calculator at none against ThreadChaser's 1. Helix Angle Calculator also leads on iOS requirement (16.6 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ThreadChaser sells 1 in-app purchase, starting at $2.99 per year. Helix Angle Calculator asks for nothing beyond the download.

Helix Angle Calculator ships an update weekly, ThreadChaser every 5 days. The most recent releases landed on October 10, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Helix Angle Calculator | ThreadChaser |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 8 MB | 2 MB |
| Requires iOS | **16.6** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SmiCut AB](https://appshunter.io/developer/1813477031) | [JAMIE SAM PARTOVI](https://appshunter.io/developer/1891387720) |

## What reviewers say

### Helix Angle Calculator

[App page](https://appshunter.io/ios/app/helix-angle-calculator/id6745720275)

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

**In-app purchases:** none


### 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 Helix Angle Calculator free?

Helix Angle Calculator is free to download, with no in-app purchases.

### Is ThreadChaser free?

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

### Do Helix Angle Calculator or ThreadChaser have ads?

Neither Helix Angle Calculator nor ThreadChaser shows ads.

### Which is updated more often, Helix Angle Calculator or ThreadChaser?

Helix Angle Calculator ships an update weekly, and ThreadChaser every 5 days. Most recently, Helix Angle Calculator was updated on October 10, 2026 and ThreadChaser on October 1, 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.*