# O2gO2 vs Click Counter

The clearest difference is in-app purchases: Click Counter at none against O2gO2's 1. Click Counter also leads on update cadence (every 2 months vs every 28 months). O2gO2's advantage is iOS requirement (12.0 vs 17.6). 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. Click Counter asks for nothing beyond the download.

O2gO2 ships an update every 28 months, Click Counter every 2 months. The most recent releases landed on October 19, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | O2gO2 | Click Counter |
| --- | --- | --- |
| 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 | 2 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aeronautical Data Systems Inc.](https://appshunter.io/developer/552304929) | [Halil Can Ugur](https://appshunter.io/developer/1765607029) |

## 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 |


### Click Counter

[App page](https://appshunter.io/ios/app/click-counter-tally-count/id6670283919)

**In-app purchases:** none


## Frequently asked questions

### Is O2gO2 free?

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

### Is Click Counter free?

Click Counter is free to download, with no in-app purchases.

### Do O2gO2 or Click Counter have ads?

Neither O2gO2 nor Click Counter shows ads.

### Which is updated more often, O2gO2 or Click Counter?

O2gO2 ships an update every 28 months, and Click Counter every 2 months. Most recently, O2gO2 was updated on October 19, 2026 and Click Counter on October 27, 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.*