# Ariel Quick Size vs SKF Spacer shaft alignment

The clearest difference is rating: Ariel Quick Size at 5.0 against SKF Spacer shaft alignment's 4.0. Ariel Quick Size also leads on iOS requirement (9.0 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ariel Quick Size holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Ariel Quick Size ships an update every 7 months, SKF Spacer shaft alignment every 5 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Ariel Quick Size | SKF Spacer shaft alignment |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ariel-quick-size/id571901596/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/skf-spacer-shaft-alignment/id1149892340/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 31 MB | 69 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ariel Corporation](https://appshunter.io/developer/571901606) | [SKF](https://appshunter.io/developer/472922971) |

## What reviewers say

### Ariel Quick Size

[App page](https://appshunter.io/ios/app/ariel-quick-size/id571901596)

This utility app helps users estimate compressor configurations based on input pressures and flow requirements. It calculates needed horsepower or flow, suggests frame and cylinder configurations, and estimates stages, bore sizes, and discharge temperatures. Results can be emailed for further review.

**Highlights:** Horsepower or gas flow estimate, Compressor frame and cylinder configuration, Estimate required stages and bore sizes, Input gas specific gravity, English or Metric units, Email results

**Features:** macOS Compatibility

**In-app purchases:** none


### SKF Spacer shaft alignment

[App page](https://appshunter.io/ios/app/skf-spacer-shaft-alignment/id1149892340)

This utility app, used with specific hardware, simplifies the process of aligning spacer shafts in rotating machinery. It offers guided measurements, automatic report generation, and helpful visual aids for accurate results. A demonstration mode allows users to experience the full alignment process before acquiring the necessary equipment.

**Highlights:** Intuitive spacer shaft alignment, Quick three-point measurements, Demonstration mode, Automatic alignment reports, Explanatory videos, 3D animations, Machine library with QR scanner

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ariel Quick Size free?

Ariel Quick Size is free to download, with no in-app purchases.

### Is SKF Spacer shaft alignment free?

SKF Spacer shaft alignment is free to download, with no in-app purchases.

### Which has better reviews, Ariel Quick Size or SKF Spacer shaft alignment?

Ariel Quick Size is rated higher. Ariel Quick Size averages 5.0 out of 5 from 2 ratings, while SKF Spacer shaft alignment averages 4.0 from 1 ratings.

### Do Ariel Quick Size or SKF Spacer shaft alignment have ads?

Neither Ariel Quick Size nor SKF Spacer shaft alignment shows ads.

### Which is updated more often, Ariel Quick Size or SKF Spacer shaft alignment?

Ariel Quick Size ships an update every 7 months, and SKF Spacer shaft alignment every 5 months. Most recently, Ariel Quick Size was updated on November 1, 2026 and SKF Spacer shaft alignment on November 2, 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.*