# Thread Calculators vs ChatCat

The clearest difference is price: ChatCat at Free against Thread Calculators's $1.99. Thread Calculators's advantage is iOS requirement (13.0 vs 18.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

ChatCat is free to download; Thread Calculators costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Thread Calculators ships an update every 10 months, ChatCat every 11 months. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Thread Calculators | ChatCat |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thread-calculators/id1670586227/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 11 months |
| Monetization | Paid | — |
| Size | 51 MB | 11 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [茵 吕](https://appshunter.io/developer/1337000923) |

## What reviewers say

### Thread Calculators

[App page](https://appshunter.io/ios/app/thread-calculators/id1670586227)

This app provides precise thread-cutting data for various international standards. It assists machinists, engineers, and CNC professionals in quickly finding essential measurements and detailed tables for thread dimensions and cutting values.

**Highlights:** Supports international thread standards (M, UNC, NPT, etc.), Tap Hole Size Calculator, Bolt Diameter Guide, Tap Hole Forming Data, Tap Hole Repair Values, Detailed thread dimension tables

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

**In-app purchases:** none


### ChatCat

[App page](https://appshunter.io/ios/app/chatcat-ai-chatbot/id6742164947)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Thread Calculators free?

Thread Calculators costs $1.99, with no in-app purchases.

### Is ChatCat free?

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

### Do Thread Calculators or ChatCat have ads?

Neither Thread Calculators nor ChatCat shows ads.

### Which is updated more often, Thread Calculators or ChatCat?

Thread Calculators ships an update every 10 months, and ChatCat every 11 months. Most recently, Thread Calculators was updated on October 8, 2026 and ChatCat on October 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.*