# O2gO2 vs DART Sim Pro Remote

The clearest difference is in-app purchases: DART Sim Pro Remote at none against O2gO2's 1. DART Sim Pro Remote also leads on update cadence (every 2 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. DART Sim Pro Remote asks for nothing beyond the download.

O2gO2 ships an update every 28 months, DART Sim Pro Remote every 2 months. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | O2gO2 | DART Sim Pro Remote |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/o2go2/id895990670/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 106 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aeronautical Data Systems Inc.](https://appshunter.io/developer/552304929) | [STAR CPR San Diego](https://appshunter.io/developer/427133089) |

## What reviewers say

### 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 |


### DART Sim Pro Remote

[App page](https://appshunter.io/ios/app/dart-sim-pro-remote/id6754192410)

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

**In-app purchases:** none


## Frequently asked questions

### Is O2gO2 free?

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

### Is DART Sim Pro Remote free?

DART Sim Pro Remote is free to download, with no in-app purchases.

### Do O2gO2 or DART Sim Pro Remote have ads?

Neither O2gO2 nor DART Sim Pro Remote shows ads.

### Which is updated more often, O2gO2 or DART Sim Pro Remote?

O2gO2 ships an update every 28 months, and DART Sim Pro Remote every 2 months. Most recently, O2gO2 was updated on October 2, 2026 and DART Sim Pro Remote 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.*