# STABLEize vs O2 Calculator Companion

The clearest difference is price: O2 Calculator Companion at $4.99 against STABLEize's $24.99. STABLEize's advantage is ratings volume (16 vs 1) and chart position (#17 vs unranked). On rating, update cadence, ads and in-app purchases there is nothing between them.

STABLEize costs $24.99 and O2 Calculator Companion $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for STABLEize against 5.0 for O2 Calculator Companion. That said, the two scores are not equally well evidenced: STABLEize has 16 ratings behind it against 1, so its average is the more settled of the two.

STABLEize ships an update every 3 weeks, O2 Calculator Companion every 2 weeks. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | STABLEize | O2 Calculator Companion |
| --- | --- | --- |
| Price | $24.99 | **$4.99** |
| Rating | [4.9 (16 ratings)](https://appshunter.io/ios/app/stableize-the-stable-program/id1467136638/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/o2-calculator-companion/id6747102425/reviews)** |
| Number of ratings | **16** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Paid | Paid |
| Best chart rank | **#17** | — |
| Size | 57 MB | 2 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [The STABLE Program](https://appshunter.io/developer/1467136637) | [Joseph Perry](https://appshunter.io/developer/1816230056) |

## What reviewers say

### STABLEize

[App page](https://appshunter.io/ios/app/stableize-the-stable-program/id1467136638)

**Currently charting:** #17 Top Paid · Medical, #154 Top Grossing · Medical (US App Store)

This medical reference app provides comprehensive guidelines and tools for managing sick infants. It covers essential modules like Sugar, Temperature, Airway, Blood Pressure, Lab Work, and Emotional Support, along with detailed information and animations on congenital heart disease.

**Highlights:** Neonatal assessment and care modules, 22 congenital heart disease animations, 4 medical calculators, Umbilical catheter insertion depth guide, Ductal dependent CHD flow visualization, Palliative procedure illustrations

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

**In-app purchases:** none


### O2 Calculator Companion

[App page](https://appshunter.io/ios/app/o2-calculator-companion/id6747102425)

This app helps EMS professionals quickly estimate oxygen tank duration in real-time. It's designed for field use with a fast, intuitive interface and works offline, eliminating guesswork in critical care scenarios.

**Highlights:** Real-time oxygen tank duration estimation, Supports multiple tank types, Adjustable PSI and flow rate settings, Automatic safety margin calculations, Smart alerts for O₂ levels, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STABLEize free?

STABLEize costs $24.99, with no in-app purchases.

### Is O2 Calculator Companion free?

O2 Calculator Companion costs $4.99, with no in-app purchases.

### Which has better reviews, STABLEize or O2 Calculator Companion?

O2 Calculator Companion is rated higher. STABLEize averages 4.9 out of 5 from 16 ratings, while O2 Calculator Companion averages 5.0 from 1 ratings.

### Do STABLEize or O2 Calculator Companion have ads?

Neither STABLEize nor O2 Calculator Companion shows ads.

### Which is updated more often, STABLEize or O2 Calculator Companion?

STABLEize ships an update every 3 weeks, and O2 Calculator Companion every 2 weeks. Most recently, STABLEize was updated on October 24, 2026 and O2 Calculator Companion on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*