# Airgas SRVS vs O2gO2

The clearest difference is rating: Airgas SRVS at 3.6 against O2gO2's 3.0. Airgas SRVS also leads on in-app purchases (none vs 1) and update cadence (every 9 months vs every 28 months). O2gO2's advantage is iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. O2gO2 sells 1 in-app purchase, starting at $2.99 per year. Airgas SRVS asks for nothing beyond the download.

Airgas SRVS holds the better App Store score, 3.6 against 3.0. That said, the two scores are not equally well evidenced: Airgas SRVS has 10 ratings behind it against 2, so its average is the more settled of the two.

Airgas SRVS ships an update every 9 months, O2gO2 every 28 months. The most recent releases landed on October 11, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Airgas SRVS | O2gO2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (10 ratings)](https://appshunter.io/ios/app/airgas-srvs/id875275554/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/o2go2/id895990670/reviews) |
| Number of ratings | **10** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 28 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 104 MB | 2 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Airgas](https://appshunter.io/developer/875275557) | [Aeronautical Data Systems Inc.](https://appshunter.io/developer/552304929) |

## What reviewers say

### Airgas SRVS

[App page](https://appshunter.io/ios/app/airgas-srvs/id875275554)

This utility app helps users manage gas mixes, track certificate expirations, and access safety data sheets for scanned products. It also provides equipment recommendations and allows for defining storage locations and product nicknames.

**Highlights:** Gas mix capabilities up to 15 components, Certificate expiration tracking, Equipment recommendations by product, Direct links to SDS, Define storage locations and product nicknames

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

**In-app purchases:** none


### O2gO2

[App page](https://appshunter.io/ios/app/o2go2/id895990670)

This utility app converts oxygen cylinder pressure into remaining time, helping users manage their compressed gas resources. It provides visual indicators and calculates duration based on tank size, current pressure, and flow rate.

**Highlights:** Converts PSI to time remaining, Calculates duration based on tank size, pressure, and flow rate, Visual multicolored strip indicates oxygen level, Yellow and red indicators for low oxygen, Automatic reset for pressure input, Assumes consistent tank size

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| O2 Go2 Yearly Subscription | $2.99 | per year |


## Frequently asked questions

### Is Airgas SRVS free?

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

### Is O2gO2 free?

O2gO2 is free to download, with in-app purchases available.

### Which has better reviews, Airgas SRVS or O2gO2?

Airgas SRVS is rated higher. Airgas SRVS averages 3.6 out of 5 from 10 ratings, while O2gO2 averages 3.0 from 2 ratings.

### Do Airgas SRVS or O2gO2 have ads?

Neither Airgas SRVS nor O2gO2 shows ads.

### Which is updated more often, Airgas SRVS or O2gO2?

Airgas SRVS ships an update every 9 months, and O2gO2 every 28 months. Most recently, Airgas SRVS was updated on October 11, 2026 and O2gO2 on October 19, 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.*