The narnar app vs STEMIcathAID
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The narnar app
This application aids researchers in processing and quantifying perfusion studies for contrast-enhanced ultrasound. It supports various organs and research protocols, offering real-time analysis of microvascular blood flow.
- Perfusion study processing
- Quantification of microvascular blood flow
- Supports various organs and research protocols
- Automatic and manual image alignment
- Real-time time-videointensity curve analysis
- Parametric imaging of blood flow
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The narnar app for contrast-enhanced ultrasound (CEUS) allows researchers to process and quantify perfusion studies of various organs (e.g., heart, kidney, liver, skeletal muscle), acquired across a range of research protocols, including cardiac realtime, cardiac triggered and generic realtime studies. Key features include: • Automatic and manual image alignment • Color-coding of digitally-subtracted images • Averaged and maximum intensity projection (MIP) imaging • Quantification and modeling of microvascular blood flow from time-videointensity curves, calculated in real-time. • Parametric imaging of blood flow and velocity
STEMIcathAID
This medical app streamlines STEMI treatment by optimizing patient recognition, response, and record-keeping. It enhances communication and coordination among healthcare providers, reducing critical time to reperfusion for high-risk patients. Features include EKG upload, cardiogenic shock assessment, and live GPS tracking.
- EKG upload via smartphone
- Cardiogenic shock assessment
- STEMI patient transfer pathway
- Live GPS tracking of EMS
- HIPAA compliant encrypted collaboration
- Notification system for cath lab preparation
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STEMIcathAID is a patient recognition, response, and record-keeping system designed to improve outcomes through adherence the American Heart Association’s Mission:Lifeline STEMI guidelines. Early restoration of blood flow to occluded coronary vessels has been shown to significantly improve outcomes for high-risk STEMI patients. STEMIcathAID aims to improve these clinical outcomes by optimizing their treatment following many of the recommendations of the AHA by reducing the time to STEMI recognition, lead acquisition, STEMI identification, notification of the catheterization lab, and reperfusion. There are multiple personnel and steps involved in caring for these high-risk patients. STEMIcathAID takes an algorithmic approach which will enhance the coordination and communication tasks essential to rapid assessment and easy transfer of STEMI patients from the field or outside facility. It will also provide protocols for the EMS or outside hospital provider to identify patients in cardiogenic shock even before their arrival in the catheterization lab. The application will integrate live GPS tracking of the patients alongside the time the alarm was raised prompting the sense of urgency in transferring the patient. Incorporating images, videos, illustrations, and live GPS tracking of the EMS, the design will be subdivided into three main sections: 1. EKG Upload by outside facility or EMS 2. Assessment of Cardiogenic Shock 3. STEMI patient transfer pathway When a medical provider, in the field, other hospital, or outpatient office, suspects STEMI, the provider uploads the EKG by taking a picture of it with their phone. Once the EKG is uploaded, the on-call attending at the PCI-capable facility receives a notification from the application. If the attending believes the patient is experiencing a real STEMI, the pathway is activated. Upon activation, the approximately 10-12 people involved in taking care of the patient are notified so they can begin preparations. Adhering to HIPAA compliance, all users log into the encrypted application and begin to collaborate such aspects as patient vitals, shock information, and emergency vehicle current location and estimated arrival time to the cath lab. Through the optimized communication and collaboration of multiple key players in the STEMI pathway, these time-critical, vulnerable patients can begin treatment promptly.
Screenshots
Verdict
The clearest difference is rating: The narnar app at 4.8 against STEMIcathAID's 3.3. STEMIcathAID's advantage is device support (3 vs 1). On price, ratings volume, update cadence and ads 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.
The narnar app holds the better App Store score, 4.8 against 3.3. Both are backed by a comparable volume of ratings — 8 and 8 respectively.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | The narnar app | STEMIcathAID |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (8 ratings) — better | 3.3 (8 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 8 | 8 |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 14.3 — better | 15.1 |
| Further details — not scored | ||
| Size | 13 MB | 71 MB |
| Age rating | 12+ | 4+ |
| Developer | narnar, LLC | Icahn School of Medicine at Mount Sinai |
Customer experience
The narnar app
STEMIcathAID
In-app purchases
The narnar app
No in-app purchases
STEMIcathAID
No in-app purchases








