# NORO vs Thread Calculator

The clearest difference is review sentiment: NORO at 100% against Thread Calculator's 33%. NORO also leads on ads (none vs shown) and monetization model (free vs ad-supported). Thread Calculator's advantage is update cadence (every 18 months vs every 66 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NORO ships an update every 66 months, Thread Calculator every 18 months. The most recent releases landed on August 12, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | NORO | Thread Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (13 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 66 months | **Every 18 months** |
| Monetization | **Free** | Ad-supported |
| Size | 52 MB | 25 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [NORO GmbH](https://appshunter.io/developer/901278858) | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) |

## What reviewers say

### NORO

[App page](https://appshunter.io/ios/app/noro/id901278855)

Access 3D CAD data for a standard product range of pipes, mouldings, and distribution systems. Engineers and project managers can view models for steel and chromium-nickel steel components directly on mobile devices.

**Highlights:** 3D CAD data access, Standard product range, Pipes, mouldings, distribution systems, Steel and chromium-nickel steel, Compatible with major CAD systems, Mobile device access

**Features:** macOS Compatibility

**In-app purchases:** none


### Thread Calculator

[App page](https://appshunter.io/ios/app/thread-calculator/id1559560290)

This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.

**Highlights:** Thread cutting calculator for multiple units, Cold forming calculator, Thread repair calculator, Tap hole and bolt diameter calculation, Saves time compared to tables

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NORO free?

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

### Is Thread Calculator free?

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

### Do NORO or Thread Calculator have ads?

Thread Calculator shows ads; NORO does not.

### Which is updated more often, NORO or Thread Calculator?

NORO ships an update every 66 months, and Thread Calculator every 18 months. Most recently, NORO was updated on August 12, 2026 and Thread Calculator on September 9, 2026.

---

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