TCTMD vs The narnar app
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TCTMD
Access cardiovascular news, journal summaries, conference coverage, and case studies. View slide presentations and videos in a mobile-friendly format.
- Daily news articles
- Journal summaries
- Conference coverage
- Case study library
- Slide presentation library
- Video library
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The TCTMD app provides TCTMD subscribers with mobile access to content found on the TCTMD web site. Content includes: - Daily news articles, including journal summaries as well as cardiovascular conference coverage. - The case study, slide presentation, & video libraries are also available in a mobile friendly format with easily viewed reports, slides & videos respectively.
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
Screenshots
Verdict
The clearest difference is review sentiment: TCTMD at 86% against The narnar app's 0%. TCTMD also leads on device support (3 vs 1). The narnar app's advantage is rating (4.8 vs 4.0) and ads (none vs shown). On price, update cadence, in-app purchases 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. 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 4.0. That said, the two scores are not equally well evidenced: The narnar app has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 86% of TCTMD's written reviews are positive against 0% of The narnar app's, so the app with the better star average is not the one people write more warmly about.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 22, 2026 and October 16, 2026 respectively.
| Parameter | TCTMD | The narnar app |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.8 (8 ratings) — better |
| Positive reviews | 85.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 | 8 — better |
| Update frequency | Every 3 months | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 15.1 | 14.3 — better |
| Further details — not scored | ||
| Size | 30 MB | 13 MB |
| Age rating | 12+ | 12+ |
| Developer | Cardiovascular Research Foundation | narnar, LLC |
Customer experience
TCTMD
The narnar app
In-app purchases
TCTMD
No in-app purchases
The narnar app
No in-app purchases
