ROX Index vs Safe Vent
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ROX Index
This medical app assists doctors and students in calculating the ROX index, a tool to predict the success or failure of High-Flow Nasal Cannula (HFNC) therapy, primarily studied in pneumonia patients. It simplifies the calculation using SpO2, FiO2, and Respiratory Rate.
- ROX index calculation
- Predicts HFNC success/failure
- Primarily for pneumonia patients
- Uses SpO2, FiO2, and RR
- Assists doctors and medical students
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The application is designed for doctors and medical students that helps to calculate ROX. ROX is an index that is formulated to predict the chance of success or failure of HFNC. It has been studied mostly in patients with Pneumonia. It is calculated as – Oxygen saturation (SpO2) / Fraction of Inspired Oxygen (FiO2) X Respiratory rate (RR) (Range for SpO2 : 70% – 100%, Range for FiO2 : 21% – 100%, Range for RR : 12/min – 70/min) As is obvious, the higher the index, the better is the chance of success. Ref link - https://www.med-specialists.net/wp-content/uploads/2021/04/ROX-Index-Management-Guidelines-of-HFNC-MSA.pdf
Safe Vent
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Safe Vent performs calculations and provides recommendations designed to guide and complement healthcare team decisions in anesthesia/operating rooms, emergencies, and intensive care units. Oxygenation formulas, ventilation, mechanical power, driving pressure, and optimal PEEP predicted by Artificial Intelligence are some of its interesting features. This application does not replace individualized medical judgment for each patient and specific situation. Privacy policy: https://docs.google.com/document/d/1ESNGzHMyY034zsNM9J1f7BLyS47zP1PTvdaTCp1sdfg/edit?pli=1#heading=h.2gfsp4psfhxd Terms and Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: ROX Index at none against Safe Vent's 2. ROX Index also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (11.0 vs 13.0). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Safe Vent sells 2 in-app purchases, starting at $2.99 per month. ROX Index asks for nothing beyond the download.
ROX Index ships an update every 3 weeks, Safe Vent every 3 months. The most recent releases landed on October 10, 2026 and September 11, 2026 respectively.
| Parameter | ROX Index | Safe Vent |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 58 MB |
| Age rating | 4+ | 17+ |
| Developer | Satish Deopujari | SYNAPS AI SAS |
In-app purchases
ROX Index
No in-app purchases
Safe Vent
- Safe Vent Full Access3 Days trial$2.991 Month
- Safe Vent Full Access3 Days trial$29.991 Year
Questions
Is ROX Index free?
Is Safe Vent free?
Do ROX Index or Safe Vent have ads?
Which is updated more often, ROX Index or Safe Vent?
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