iElastance vs Safe Vent
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iElastance
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iElastance estimates left ventricular end-systolic elastance (Ees), effective arterial elastance (Ea) and their ratio, ventricular–arterial coupling (VAC), from six values you already have at the bedside: cuff pressures, a standard echocardiogram and two systolic time intervals. No catheter, no extra equipment. FREE • Single-beat calculator (Chen et al., J Am Coll Cardiol 2001): systolic and diastolic pressure, ejection fraction, stroke volume, pre-ejection and total ejection time. • Results update as you type, with checks on impossible values. • "How to measure" guide with diagrams of the method of disks and of systolic times on the LVOT pulsed Doppler. IELASTANCE PREMIUM • Pressure–volume diagram: ESPVR and Ea lines, stroke volume, ESP, EDV, ESV and V0. • Cases: keep your 10 most recent cases, each with as many measurements as you need (baseline, after fluids, after a vasopressor or inotrope…). • Trends of VAC, Ea and Ees over time. • PDF report with results, diagrams, measurement table, trends, method and reference, ready to print or share. • Archive export and import to move your cases to another device. PRIVATE BY DESIGN No account, no analytics, no advertising. Cases and reports stay on your device. SUBSCRIPTION iElastance Premium is an auto-renewing yearly subscription with a 7-day free trial for new subscribers. Payment is charged to your App Store account at confirmation of purchase after the trial. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel it in your account settings. Terms of Use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ielastance.sonable.app/privacy-app.html FOR HEALTHCARE PROFESSIONALS iElastance is intended for physicians and healthcare professionals in intensive care, anaesthesia and cardiology. Results are estimates from a published model and support, never replace, clinical judgement. It does not provide diagnoses or treatment recommendations.
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: iElastance at none against Safe Vent's 2. Safe Vent's advantage is update cadence (every 3 months vs every 8 months). On price, ads, device support and iOS requirement 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. iElastance asks for nothing beyond the download.
iElastance ships an update every 8 months, Safe Vent every 3 months. The most recent releases landed on October 21, 2026 and October 15, 2026 respectively.
| Parameter | iElastance | Safe Vent |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 58 MB | 58 MB |
| Age rating | 12+ | 17+ |
| Developer | Pietro Bertini | SYNAPS AI SAS |
In-app purchases
iElastance
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 iElastance free?
Is Safe Vent free?
Do iElastance or Safe Vent have ads?
Which is updated more often, iElastance or Safe Vent?
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