Comparison

CarDSScan vs Bivryn Biological Intelligence

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CarDSScan

This app provides on-device ECG analysis using advanced AI models. It ensures privacy by processing all data locally, with no internet connection or cloud uploads required. Designed for research, it offers two distinct analysis engines for detailed signal understanding.

Highlights
  • On-device AI ECG analysis
  • Offline processing
  • ECG image capture and import
  • Two AI analysis engines (ECG-Vision ATTR, ECG-GPT)
  • Privacy-focused design
  • Secure model downloads
  • Research documentation export
Read full description

CarDSScan delivers research-grade, on-device ECG analysis from the Cardiovascular Data Science (CarDS) Lab. Built for reliability and privacy, CarDSScan runs its machine-learning models entirely on your iPhone - no internet required and no cloud uploads. Two ECG analysis engines ECG-Vision ATTR: Capture or import clear photos of printed or screen-displayed ECGs for fast, fully on-device analysis. ECG-GPT: A transformer-based ECG interpretation model designed for research-grade signal understanding. ECG-GPT runs locally on your device and may require approval for access. Private by design All inference happens locally on your device. ECG images and outputs stay with you unless you explicitly export them. Certain advanced models may be downloaded after approval. Developed by CarDS Lab Models are developed by the Cardiovascular Data Science (CarDS) Lab and have been evaluated across multi-center research datasets. CarDSScan is intended for research use only and is not a medical device. Key Features On-device ML inference (offline; no cloud processing) 12-lead ECG image capture and import ECG-Vision ATTR CNN model and ECG-GPT transformer-based model for research workflows Secure model download for approved users Clean, professional UI designed for study workflows Fast processing with reproducible outputs Optional export for research documentation Who It’s For Research teams, engineers, and clinicians conducting feasibility studies, validation work, and algorithm benchmarking in controlled settings. Privacy at a Glance No automatic data collection No ads, no trackers, no data sale Data stays on device unless you export it Requirements iPhone with camera (iOS 17.6 or later) Important CarDSScan is for research use only. It does not provide medical advice and is not intended for diagnosis or treatment. Do not make clinical decisions based on the app’s outputs.

About

Bivryn Biological Intelligence

Features
Read full description

Your wearable knows what happened. Bivryn tells you why. "Why do I feel off today?" "Is coffee wrecking my sleep?" "Did that actually help?" Most health apps wait for you to ask. Bivryn reads your Apple Health stream every morning — sleep, HRV, recovery, blood work, behaviour, weather — names what changed and the likely reason, and tells you whether what you tried last time worked. The daily reading is free, with the wearable you already own; membership adds the patterns and the answers. TODAY One calm reading of how your biology is landing, from sleep, HRV, resting heart rate, respiratory rate, wrist temperature, bedtime timing and travel. The Arc behind it draws your last 24 hours. Under it, the day ahead with clock times — how long the morning holds, when the dip lands, whether the evening comes back — and this week against last, in numbers. WHY Ask anything — why am I tired this week, what changed in my last 14 days — and Bivryn reads across a year of your biology to answer. PATTERNS Correlations across your behaviour and biology you'd never spot by hand, including the 1, 2 and 3-day delays where the real signal usually lives. PROOF Try one change at a time — a supplement, an earlier dinner, a training protocol. Bivryn captures your baseline, tracks adherence, and tells you honestly whether your biology actually moved. LABS Upload a lab PDF. Bivryn reads cholesterol, ferritin, vitamin D, hs-CRP, glucose, thyroid and hormone markers, and connects them to your sleep, energy and recovery. MEMORY When today's biology matches a day from your own history, Bivryn surfaces what came next, over a living timeline of travel, recovery stretches and supplement changes. LONG ARC Bivryn Bio Age: a continuous reading from up to nine channels, scored against your own baselines and published ranges, computed on your device. RIGHT NOW Breathing, mindful walks, eye rest, light reset — with the HRV change measured before and after. WORKS WITH WHAT YOU ALREADY WEAR Apple Watch, Oura, WHOOP, Garmin, Withings and lab panels all flow in through Apple Health. Bivryn reads every source you have and tells you which one recorded last night. PRIVACY BY DEFAULT Your biology stays on your device, syncing only to your own iCloud account if you choose. We don't sell your data or share it with advertisers. Export everything as JSON, or delete everything, with one tap from inside the app. Requires iOS 17 or later. Apple Watch supported but not required. On-device interpretation of the free reading uses Apple Intelligence where available. Bivryn is not a medical device. It provides informational and educational insights about your biology and is not intended to diagnose, treat, cure or prevent any disease. For medical concerns, consult a healthcare professional. WHAT'S FREE, WHAT MEMBERSHIP ADDS Free: the daily reading, the forecast, the weekly reading, your year, personal bests, rhythms, blood work, the Doctor Snapshot, the Apple Watch app and widgets. Membership: Discoveries (patterns between what you do and what your body does), Ask Bivryn (answers from your own data), the written chapters in Body Memory and the weekly recap. $6.99/month or $39.99/year, first 7 days free. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours of the end of the current period. Manage or cancel in your Apple Account settings after purchase. Any unused portion of a free trial is forfeited when you buy a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Bivryn Terms of Service: https://bivryn.web.app/terms Privacy Policy: https://bivryn.web.app/privacy

Screenshots

CarDSScan4 screens
Bivryn Biological Intelligence4 screens

Verdict

The call

The clearest difference is in-app purchases: CarDSScan at none against Bivryn Biological Intelligence's 2. Bivryn Biological Intelligence's advantage is update cadence (every 2 weeks vs every 2 months) and device support (3 vs 1). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Bivryn Biological Intelligence sells 2 in-app purchases, starting at $6.99 per month. CarDSScan asks for nothing beyond the download.

UpkeepUpdate frequency

CarDSScan ships an update every 2 months, Bivryn Biological Intelligence every 2 weeks. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 6 level
CarDSScan versus Bivryn Biological Intelligence: the parameters behind the verdict, then further details
ParameterCarDSScanBivryn Biological Intelligence
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.617.0 — better
Further details — not scored
Size231 MB24 MB
Age rating17+12+
DeveloperRohan KheraAmita Dhand

In-app purchases

None

CarDSScan

No in-app purchases

2 purchases

Bivryn Biological Intelligence

Subscriptions2
  • Bivryn Premium Monthly7 Days trial$6.991 Month
  • Bivryn Premium Annual7 Days trial$39.991 Year

Questions

Is CarDSScan free?
CarDSScan is free to download, with no in-app purchases.
Is Bivryn Biological Intelligence free?
Bivryn Biological Intelligence is free to download, with in-app purchases available.
Do CarDSScan or Bivryn Biological Intelligence have ads?
Neither CarDSScan nor Bivryn Biological Intelligence shows ads.
Which is updated more often, CarDSScan or Bivryn Biological Intelligence?
CarDSScan ships an update every 2 months, and Bivryn Biological Intelligence every 2 weeks. Most recently, CarDSScan was updated on October 30, 2026 and Bivryn Biological Intelligence on October 29, 2026.

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