# Fastener Calc vs iAlignTest

The clearest difference is price: iAlignTest at Free against Fastener Calc's $2.99. Fastener Calc's advantage is update cadence (every 4 months vs every 32 months) and iOS requirement (8.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

iAlignTest is free to download; Fastener Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fastener Calc ships an update every 4 months, iAlignTest every 32 months. The most recent releases landed on October 20, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Fastener Calc | iAlignTest |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/fastener-calc/id388420104/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 32 months |
| Monetization | Paid | — |
| Size | 8 MB | 8 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bossard AG](https://appshunter.io/developer/388420107) | [Motionics LLC](https://appshunter.io/developer/424498959) |

## What reviewers say

### Fastener Calc

[App page](https://appshunter.io/ios/app/fastener-calc/id388420104)

This app provides engineers, technicians, and students with essential tools for bolted joint development. It includes converters for various units and geometrical and mechanical calculators for dimensioning and design in joining technology.

**Highlights:** Unit converters (length, torque, pressure, force), Metric-imperial fastener conversion, Drill hole size calculator, Tapping screw pilot hole design, Bolt size and property class estimation, Disc spring calculator, Thread engagement length calculator

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

**In-app purchases:** none


### iAlignTest

[App page](https://appshunter.io/ios/app/ialigntest/id535606893)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fastener Calc free?

Fastener Calc costs $2.99, with no in-app purchases.

### Is iAlignTest free?

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

### Do Fastener Calc or iAlignTest have ads?

Neither Fastener Calc nor iAlignTest shows ads.

### Which is updated more often, Fastener Calc or iAlignTest?

Fastener Calc ships an update every 4 months, and iAlignTest every 32 months. Most recently, Fastener Calc was updated on October 20, 2026 and iAlignTest on October 14, 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.*