neoSim — Neonatal resuscitation practice that responds

The physiology engine

Vitals move when you act. The baby is always responding — what you do next changes the outcome.

Most resus trainers run on branching scripts. neoSim runs on a continuous physiological model: oxygen delivery, lung mechanics, circulatory transition, thermal regulation, drug pharmacodynamics. Start PPV too late, deliver the wrong tidal volume, forget to warm — the numbers move the way they would at a real delivery. Perfect your clinical reasoning without a manikin, a room booking, or an instructor.

Scenario library

What you'll actually practise.

15+ curated presentations across the core NRP algorithm, plus a custom preterm builder and a daily Sim of the Day with anonymous global percentile ranking.

Core 5–10 min

Term asphyxia

Mild, moderate, or severe. Ventilation timing, compression decision, adrenaline if needed.

Core 6–10 min

Meconium aspiration

Non-vigorous infant. Airway clearance, PPV strategy, and recognising the drift toward intubation.

Advanced 8–15 min

Preterm RDS · 24–34 wk

Plastic wrap, CPAP vs intubation, surfactant timing, FiO2 management for preterm SpO2 targets.

Advanced 8–12 min

Tension pneumothorax

Acute deterioration post-PPV with asymmetric chest rise. Recognition under pressure, needle decompression.

Advanced 8–14 min

Neonatal sepsis

Septic shock recognition, fluid resuscitation, escalation.

Advanced 8–14 min

Antepartum haemorrhage

Hypovolaemia, pallor, and the difference between saline and O-negative blood for volume expansion.

Expert 12–18 min

Extreme preterm · 24 wk

ELBW resuscitation: thermal care, gentle ventilation, surfactant strategy with critical lung disease.

Daily 5–15 min

Sim of the Day

A fresh scenario every 24 hours, two attempts, anonymous global percentile ranking.

+ Suggest Open

Suggest a scenario

Email a clinical presentation you'd like to practise. We add cases monthly.

Built by a clinician

Made by someone who's walked into the same deliveries.

neoSim is built by Dr Mike Hewson — a clinician-developer behind nicutools.org, the neonatal reference used by clinicians worldwide. The physiology engine is aligned with NRP 9th edition and ANZCOR Guideline 13 (2024) principles, with differences between the two guidelines flagged where relevant.

Educational use only — not a clinical decision-support tool.

✓

Aligned to current guidelines NRP 9th edition · ANZCOR Guideline 13 (2024)

One TypeScript engine Same physiology runs on iOS and the web — no divergence

📋

CPD-ready training log Sign in with Apple, export Summary or Detailed PDFs for your portfolio

Questions

Things people ask before they try.

Is it free?

There's a free browser demo at /app with the daily Sim of the Day, the controls tutorial, and one ELBW scenario — no sign-in needed. Team mode is also free in any browser. The iOS app is a one-time purchase of $19.99 AUD on the App Store — that gets you the full scenario library, AI-assisted debrief commentary, CPD training log with PDF export, and offline use. Training programs and hospitals can buy in bulk through Apple Business Manager or Apple School Manager — Apple handles licensing and reassignment, and education buyers of 20+ copies receive a 50% volume discount automatically.

How is this different from NRP Online or Laerdal SimBaby?

NRP Online is primarily knowledge testing — multiple-choice questions on the algorithm. SimBaby and similar physical manikins are excellent but cost tens of thousands and need booking time, a room, and a facilitator. neoSim is designed for the gap: unlimited, asynchronous, continuous-physiology practice you can do on your phone in five minutes.

Is the physiology model evidence-based?

The underlying model draws on published neonatal physiology — oxygen delivery and demand, lung mechanics, circulatory transition, thermal regulation, drug pharmacodynamics. Scenarios and behaviour are aligned with NRP 9th edition (2025) and ANZCOR Guideline 13 (2024) principles. It is not a validated clinical decision tool and must not be used to make patient care decisions.

Is it CPD or CME accredited?

Not directly. The in-app training log records every completed sim and exports a Summary or Detailed PDF, which you can submit as self-directed learning evidence to your CPD portfolio (RACP, MCNZ, RCPCH and similar pathways accept this).

Does it work offline?

The iOS app runs sims fully offline — the entire physiology engine and scenario library are bundled. The AI debrief commentary requires a connection to generate (one short request per sim). Team mode requires a connection (it's a multiplayer browser experience).

What about my data?

CPD log entries are tied to your Sign in with Apple account and used only to populate your training history. Sim of the Day scores submit anonymously with HMAC validation — no personal data. AI debrief calls send anonymised sim physiology and timeline data to our server, which proxies the request to Anthropic's API. We use Cloudflare Web Analytics for aggregate pageview counts — no cookies, no personal data, no fingerprinting. No third-party advertising SDKs.

Who built this?

Dr Mike Hewson — a neonatologist and developer based in Adelaide, Australia, also behind nicutools.org. The scenario library and physiology calibration draw on input from practising neonatologists.

Practice resus until the decisions feel automatic.

Vitals move when you act. The baby is always responding — what you do next changes the outcome.

Anyone who walks into a delivery and wants to be ready.

What you'll actually practise.

Four steps. No instructor needed.

Made by someone who's walked into the same deliveries.

Teaching a group? Run team mode in any browser.

Things people ask before they try.

The next delivery is always coming. Be ready.