# Thread Calculators vs Taper Formulas & Tools

The clearest difference is price: Taper Formulas & Tools at Free against Thread Calculators's $1.99. Thread Calculators's advantage is rating (5.0 vs 4.0) and in-app purchases (none vs 1). On ratings volume, update cadence, ads and device support there is nothing between them.

Taper Formulas & Tools is free to download; Thread Calculators costs $1.99 up front. Taper Formulas & Tools sells 1 one-off in-app purchase. Thread Calculators asks for nothing beyond the download.

Thread Calculators holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Thread Calculators ships an update every 10 months, Taper Formulas & Tools every 9 months. The most recent releases landed on August 1, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Thread Calculators | Taper Formulas & Tools |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thread-calculators/id1670586227/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/taper-formulas-and-tools/id6755769356/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 9 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 51 MB | 33 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) |

## 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


### Taper Formulas & Tools

[App page](https://appshunter.io/ios/app/taper-formulas-and-tools/id6755769356)

This app provides essential machining calculators for taper turning, lathe operations, and angle measurements. It simplifies complex calculations for machinists, engineers, and students, ensuring precision in every task. Supports both metric and imperial units.

**Highlights:** Taper angle calculator, Diameter calculations, Length and ratio tools, Angle calculator, Metric/imperial support, Formula references

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $9.99 | one-time |


## Frequently asked questions

### Is Thread Calculators free?

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

### Is Taper Formulas & Tools free?

Taper Formulas & Tools is free to download, with in-app purchases available.

### Which has better reviews, Thread Calculators or Taper Formulas & Tools?

Thread Calculators is rated higher. Thread Calculators averages 5.0 out of 5 from 1 ratings, while Taper Formulas & Tools averages 4.0 from 1 ratings.

### Do Thread Calculators or Taper Formulas & Tools have ads?

Neither Thread Calculators nor Taper Formulas & Tools shows ads.

### Which is updated more often, Thread Calculators or Taper Formulas & Tools?

Thread Calculators ships an update every 10 months, and Taper Formulas & Tools every 9 months. Most recently, Thread Calculators was updated on August 1, 2026 and Taper Formulas & Tools on September 15, 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.*