# Thread Calculators vs EinkBro

The clearest difference is price: EinkBro at Free against Thread Calculators's $1.99. EinkBro also leads on update cadence (every 5 days vs every 10 months). Thread Calculators's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

EinkBro 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, EinkBro every 5 days. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Thread Calculators | EinkBro |
| --- | --- | --- |
| 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 5 days** |
| Monetization | Paid | — |
| Size | 51 MB | 59 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [MAO YUAN KAO](https://appshunter.io/developer/1462579816) |

## 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


### EinkBro

[App page](https://appshunter.io/ios/app/einkbro/id6792317757)

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

**In-app purchases:** none


## Frequently asked questions

### Is Thread Calculators free?

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

### Is EinkBro free?

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

### Do Thread Calculators or EinkBro have ads?

Neither Thread Calculators nor EinkBro shows ads.

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

Thread Calculators ships an update every 10 months, and EinkBro every 5 days. Most recently, Thread Calculators was updated on September 22, 2026 and EinkBro on September 10, 2026.

---

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