iElastance vs Nerbio iTOF
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.
Nerbio iTOF
This medical application works with a specific device to provide quantitative monitoring of neuromuscular blocking agents. It enhances patient safety and accuracy in monitoring, offering wireless control for caregivers. The system is recommended by anesthesiologists for precise neuromuscular transmission monitoring.
- Quantitative neuromuscular transmission monitoring
- Works with iTOF device hardware
- Remote patient monitoring
- Wireless control for caregivers
- Automated quantitative monitoring
- FDA cleared
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Nerbio’s iTOF® app works with the iTOF device; an FDA cleared, quantitative neuromuscular transmission (NMT) monitor for remote monitoring of neuromuscular blocking agents (NMBAs). The iTOF app is designed to make patient monitoring safer, easier to use, and more accurate than ever. The iTOF is the first mobile device-managed, quantitative monitor of NMBAs. The combination of the app and Bluetooth-connected stimulator device allows precise, automated quantitative monitoring of the level of neuromuscular block. Wireless control also improves caregiver safety while maintaining a high-level of patient care. The iTOF system is recommended by leading anesthesiologists and used around the world for accurate NMBA monitoring. ------------------------------- NOTE: This app requires the iTOF device hardware to perform monitoring. Contact nerbio.com for information. iTOF is a registered trademark of Nerbio Medical Software Platforms, Inc. San Jose, California USA. ------------------------------- NOTE: Nerbio’s iTOF is authorized for use in the following countries: USA CHILE COLOMBIA INDIA -------------------------------
Screenshots
Verdict
The clearest difference is update cadence: Nerbio iTOF at every 2 months against iElastance's every 8 months. iElastance's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
iElastance ships an update every 8 months, Nerbio iTOF every 2 months. The most recent releases landed on October 21, 2026 and September 29, 2026 respectively.
| Parameter | iElastance | Nerbio iTOF |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 58 MB | 87 MB |
| Age rating | 12+ | 17+ |
| Developer | Pietro Bertini | Nerbio Medical Software Platform Inc |
In-app purchases
iElastance
No in-app purchases
Nerbio iTOF
No in-app purchases









