# O2gO2 vs Tele

The clearest difference is rating: O2gO2 at 3.0 against Tele's 2.3. O2gO2 also leads on iOS requirement (12.0 vs 17.0). Tele's advantage is in-app purchases (none vs 1) and update cadence (every 4 months vs every 28 months). On price, ratings volume, 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. Tele asks for nothing beyond the download.

O2gO2 holds the better App Store score, 3.0 against 2.3. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

O2gO2 ships an update every 28 months, Tele every 4 months. The most recent releases landed on October 2, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | O2gO2 | Tele |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/o2go2/id895990670/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/tele-cloud/id1441136792/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 4 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 2 MB | 120 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aeronautical Data Systems Inc.](https://appshunter.io/developer/552304929) | [Tele Cloud LLC](https://appshunter.io/developer/1441136791) |

## 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 |


### Tele

[App page](https://appshunter.io/ios/app/tele-cloud/id1441136792)

This utility app allows users to make and receive calls from their mobile device as if they were in the office. It provides access to voicemails and call history, and enables easy greeting changes. An existing account with the Tele Cloud System is required for functionality.

**Highlights:** Make office calls from mobile, Receive calls on mobile, Access voicemails, View call history, Change greeting remotely

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


## Frequently asked questions

### Is O2gO2 free?

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

### Is Tele free?

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

### Which has better reviews, O2gO2 or Tele?

O2gO2 is rated higher. O2gO2 averages 3.0 out of 5 from 2 ratings, while Tele averages 2.3 from 3 ratings.

### Do O2gO2 or Tele have ads?

Neither O2gO2 nor Tele shows ads.

### Which is updated more often, O2gO2 or Tele?

O2gO2 ships an update every 28 months, and Tele every 4 months. Most recently, O2gO2 was updated on October 2, 2026 and Tele on September 15, 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.*