# Air Density & Altitude vs Eclipse O

The clearest difference is rating: Eclipse O at 4.7 against Air Density & Altitude's 3.4. Eclipse O also leads on in-app purchases (none vs 2) and review sentiment (83% vs 50%). Air Density & Altitude's advantage is update cadence (every 3 months vs every 6 months) and iOS requirement (9.0 vs 15.6). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Air Density & Altitude sells 2 in-app purchases, starting at $0.99 per month. Eclipse O asks for nothing beyond the download.

Eclipse O holds the better App Store score, 4.7 against 3.4. Both are backed by a comparable volume of ratings — 19 and 11 respectively. Written reviews point the same way: 50% of Air Density & Altitude's written reviews are positive against 83% of Eclipse O's.

Air Density & Altitude ships an update every 3 months, Eclipse O every 6 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Air Density & Altitude | Eclipse O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (19 ratings)](https://appshunter.io/ios/app/air-density-and-altitude-airlab/id1468692831/reviews) | **[4.7 (11 ratings)](https://appshunter.io/ios/app/eclipse-o-ring-finder/id1491496693/reviews)** |
| Number of ratings | **19** | 11 |
| Positive reviews | 50.0% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 40 MB | 308 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ballistic Solutions LLC](https://appshunter.io/developer/1611909747) | [Planet Eclipse Ltd](https://appshunter.io/developer/1491488435) |

## What reviewers say

### Air Density & Altitude

[App page](https://appshunter.io/ios/app/air-density-and-altitude-airlab/id1468692831)

This tool calculates air density, density altitude, and dyno correction factors using weather data from various sources, GPS, or onboard barometers. It's designed for tuners and aviators needing precise atmospheric data for performance calculations.

**Highlights:** Air Density calculation, Density Altitude calculation, Dyno Correction Factor, Integration with weather services, GPS and barometer support, Manual location selection, Bluetooth weather station integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month | $0.99 | per month |
| One Year | $3.49 | per year |


### Eclipse O

[App page](https://appshunter.io/ios/app/eclipse-o-ring-finder/id1491496693)

Easily identify the correct o-rings for your Eclipse paintball markers. This application provides a quick reference to ensure you have the right parts for maintenance and repairs.

**Highlights:** O-ring identification for Eclipse markers, Quick reference tool, Maintenance and repair assistance, Specific to Eclipse paintball products

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Air Density & Altitude free?

Air Density & Altitude is free to download, with in-app purchases available.

### Is Eclipse O free?

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

### Which has better reviews, Air Density & Altitude or Eclipse O?

Eclipse O is rated higher. Air Density & Altitude averages 3.4 out of 5 from 19 ratings, while Eclipse O averages 4.7 from 11 ratings.

### Do Air Density & Altitude or Eclipse O have ads?

Neither Air Density & Altitude nor Eclipse O shows ads.

### Which is updated more often, Air Density & Altitude or Eclipse O?

Air Density & Altitude ships an update every 3 months, and Eclipse O every 6 months. Most recently, Air Density & Altitude was updated on November 3, 2026 and Eclipse O on November 3, 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.*