# Drill Bit Converter vs Thread Calculators

The clearest difference is update cadence: Thread Calculators at every 10 months against Drill Bit Converter's every 54 months. Drill Bit Converter's advantage is price ($0.99 vs $1.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Drill Bit Converter costs $0.99 and Thread Calculators $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Drill Bit Converter ships an update every 54 months, Thread Calculators every 10 months. The most recent releases landed on September 21, 2026 and August 1, 2026 respectively.

## The numbers

| Metric | Drill Bit Converter | Thread Calculators |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| 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 54 months | **Every 10 months** |
| Monetization | — | Paid |
| Size | 2 MB | 51 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dohmann Engineering Services](https://appshunter.io/developer/401682475) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## What reviewers say

### Drill Bit Converter

[App page](https://appshunter.io/ios/app/drill-bit-converter/id1552080952)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Drill Bit Converter free?

Drill Bit Converter costs $0.99, with no in-app purchases.

### Is Thread Calculators free?

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

### Do Drill Bit Converter or Thread Calculators have ads?

Neither Drill Bit Converter nor Thread Calculators shows ads.

### Which is updated more often, Drill Bit Converter or Thread Calculators?

Drill Bit Converter ships an update every 54 months, and Thread Calculators every 10 months. Most recently, Drill Bit Converter was updated on September 21, 2026 and Thread Calculators on August 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.*