# Ariel Quick Size vs LogBook Evident

The clearest difference is rating: Ariel Quick Size at 5.0 against LogBook Evident's 4.2. Ariel Quick Size also leads on review sentiment (100% vs 67%) and iOS requirement (9.0 vs 13.0). LogBook Evident's advantage is update cadence (every 2 weeks vs every 7 months) and ratings volume (5 vs 1). On price, ads, in-app purchases and monetization model 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 4.2. That said, the two scores are not equally well evidenced: LogBook Evident has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Ariel Quick Size's written reviews are positive against 67% of LogBook Evident's.

Ariel Quick Size ships an update every 7 months, LogBook Evident every 2 weeks. The most recent releases landed on July 1, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Ariel Quick Size | LogBook Evident |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ariel-quick-size/id571901596/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/logbook-evident/id1314558369/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 31 MB | 42 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ariel Corporation](https://appshunter.io/developer/571901606) | [Doozer Software, Inc.](https://appshunter.io/developer/1314558368) |

## 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


### LogBook Evident

[App page](https://appshunter.io/ios/app/logbook-evident/id1314558369)

This app allows users to easily capture notes and inspection data on the go, with the ability to attach photos for clarity. It syncs seamlessly with a cloud-based system for secure storage and team collaboration, eliminating the need for physical clipboards.

**Highlights:** Create operational notes, Capture inspection data, Attach photos to notes, Offline data collection, Cloud synchronization, Team collaboration

**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 LogBook Evident free?

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

### Which has better reviews, Ariel Quick Size or LogBook Evident?

Ariel Quick Size is rated higher. Ariel Quick Size averages 5.0 out of 5 from 1 ratings, while LogBook Evident averages 4.2 from 5 ratings.

### Do Ariel Quick Size or LogBook Evident have ads?

Neither Ariel Quick Size nor LogBook Evident shows ads.

### Which is updated more often, Ariel Quick Size or LogBook Evident?

Ariel Quick Size ships an update every 7 months, and LogBook Evident every 2 weeks. Most recently, Ariel Quick Size was updated on July 1, 2026 and LogBook Evident on June 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.*