The narnar app vs DeviceAID
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
DeviceAID
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DeviceAID is an educational application with many categories of devices used in both diagnostic Cath as well as interventional cardiology. With hundreds of devices to keep in your head, having a tool to get to the key few numbers can be invaluable. A basics section introduces devices, and the library section allows for the searching and filtering of devices based on some key characteristics. Current sections include Catheters, stents, balloons, atherectomy devices, access, closure, and more. Devices can be added to your personal favorites list for easy access later. For those who want to refine their knowledge of devices, quizzes with correct answer explanations are available.
Screenshots
Verdict
The clearest difference is ads: The narnar app at none against DeviceAID's shown. The narnar app also leads on update cadence (every 3 months vs every 14 months) and iOS requirement (14.3 vs 18.0). On price, 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.
The narnar app ships an update every 3 months, DeviceAID every 14 months. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.
| Parameter | The narnar app | DeviceAID |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (8 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 3 months — better | Every 14 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 14.3 — better | 18.0 |
| Further details — not scored | ||
| Size | 13 MB | 60 MB |
| Age rating | 12+ | 12+ |
| Developer | narnar, LLC | Cardiology Apps LLC |
In-app purchases
The narnar app
No in-app purchases
DeviceAID
No in-app purchases








