Comparison

Bivryn Biological Intelligence vs MARYN

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

Head to head
About

Bivryn Biological Intelligence

Features
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Find what your wearable missed. Bivryn reads across your Apple Health signals โ€” sleep, HRV, recovery, blood work, supplements, behavior โ€” and tells you what's actually moving your biology, in a calm editorial voice. Most health apps overwhelm you with charts, scores, and disconnected metrics. Bivryn synthesizes across Apple Watch, Oura, Garmin, lab panels, and your local weather. It learns your personal baselines from up to a year of your history the first time you open the app, so today's reading sits against your own typical, not generic norms. "Your body is asking for a softer day." "Hard workout Monday. HRV crash Wednesday is your 2-day lag pattern." "Coffee after 2 PM is reducing your deep sleep by 31%." These aren't generic tips. Bivryn finds patterns hidden in your own data โ€” the kind no wearable can spot, because every wearable is locked to its own sensors. Works with what you already have: Apple Watch, Oura, Whoop, Garmin, and lab panels. Now available in English, Hindi, French, German, Spanish, and Hebrew. WHAT BIVRYN DOES Bivryn Bio Age. A continuous biological-age reading from up to nine signals โ€” VOโ‚‚max, HRV, heart rate, blood pressure, waist-to-height, sleep efficiency, blood work. Trends with your biology over weeks. AI Body State, daily. A personalized read of how your body is doing today, with the specific drivers behind it. Ask Bivryn anything. Type or ask by voice โ€” why am I tired, what changed this week, does coffee affect my sleep โ€” and Bivryn reads across your full year of biology, logs, weather, and patterns to answer. Discoveries. Bivryn continuously finds correlations across your behavior and biology. "HRV drops for 48 hours after alcohol." Blood Work Intelligence. Upload a lab PDF and Bivryn interprets cholesterol, ferritin, vitamin D, hs-CRP, glucose, hormones โ€” connecting markers to your sleep, energy, recovery. Hormone Panel. Three lenses: cycle phase, mental-health context, longitudinal drift. Self-Experiments. Test one change at a time. Bivryn measures your baseline and tells you honestly whether your biology moved. Body Memory. A living biological timeline โ€” travel, recovery periods, supplement changes, milestones. The narrative layer no wearable dashboard offers. Sleep Architecture. REM, deep, and core sleep with behavior correlation. Cardio Fitness & Training Capacity. Honest reads for athletes who want to push or recover with intention. Reset Toolbox. Evidence-backed breathing, walks, eye rest, and light reset sessions. Doctor Snapshot. One-page PDF for your physician, or a full markdown dossier for AI. Apple Watch companion. Score, recovery curve, breathing sessions, complications on your wrist. Siri & Shortcuts. "Hey Siri, what's my body state?" โ€” or chain Bivryn into any iOS automation. CALM BY DESIGN No streaks. No leaderboards. No daily push-to-be-better. The score is a reading, not a grade. The voice is observational, not prescriptive. Bivryn isn't a doctor and never plays one. DESIGNED FOR High performers, founders, biohackers, longevity-focused individuals, athletes, and anyone tired of fitness-tracker noise who wants their biology to make sense. PRICING 7 days of full access, no card required. After trial: $14.99/month or $99.99/year. Auto-renews unless canceled; managed through your Apple Account. PRIVACY Your sleep, HRV, blood work, and logged data stay on your device. Anonymous usage events help us improve Bivryn โ€” no personal data, no health data, never sold. We don't track you across apps. Local weather is fetched via Apple's WeatherKit; coordinates never leave your device. Terms of Use: https://bivryn.web.app/terms Privacy Policy: https://bivryn.web.app/privacy IMPORTANT Bivryn is not a medical device. It is not intended to diagnose, treat, cure, or prevent any disease. For medical concerns, consult a healthcare professional.

About

MARYN

Features
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Maryn is a fitness and lifestyle app built around guided challenges: structured training, meal plans that fit your goals, and a group that starts and finishes together. TRAIN WITH A PLAN Join a challenge and get a week-by-week training plan that unlocks as you go. Every session opens in a workout player that walks you through each block, set and exercise, with demo videos whenever you're unsure of a movement. Prefer your own schedule? Standalone training plans are there too โ€” start one any time and work through it at your own pace. TRACK EVERY SET Log reps, weight and RPE as you train. Your history stays with you, so you can see what you lifted last time and beat it. Personal records and training streaks are tracked automatically. EAT WITHOUT THE GUESSWORK Get a personalised meal plan built around your goals, with recipes for every meal and macros already worked out. Turn a week's plan into a shopping list grouped by category, so a grocery run takes minutes instead of an hour. SEE PROGRESS THAT ISN'T JUST THE SCALE Record body measurements and progress photos, and watch your workout stats and weekly consistency build over time. DO IT WITH OTHERS Every challenge has its own feed and group chat. Share a finished workout, ask a question, and see how everyone else is getting on. MARYN PRO Full access to challenges, training plans, meal plans and recipes requires a MARYN Pro subscription. โ€ข Monthly โ€” 19โ‚ฌ โ€ข Annual โ€” 190โ‚ฌ Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is switched off at least 24 hours before the end of the current period, and your Apple Account is charged for renewal within 24 hours of the period ending. Manage or cancel your subscription in Settings > [your name] > Subscriptions. Maryn provides general fitness and nutrition information and is not medical advice. Talk to a doctor before starting a new training or nutrition programme. Terms of Use: https://maryn.ee/legal/terms Privacy Policy: https://maryn.ee/legal/privacy Support: https://maryn.ee/support

Screenshots

Bivryn Biological Intelligence4 screens
MARYN4 screens

Verdict

The call

The clearest difference is update cadence: MARYN at every 3 days against Bivryn Biological Intelligence's every 11 days. MARYN also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Bivryn Biological Intelligence sells 2 in-app purchases, starting at $14.99 per month and MARYN sells 2 in-app purchases, starting at $19.00 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Bivryn Biological Intelligence ships an update every 11 days, MARYN every 3 days. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

Scorecard2 real differences ยท 4 level
Bivryn Biological Intelligence versus MARYN: the parameters behind the verdict, then further details
ParameterBivryn Biological IntelligenceMARYN
PriceFreeFree
Update frequencyEvery 11 daysEvery 3 days โ€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Apple Watch โ€” betteriPhone, iPod
Requires iOS17.015.1 โ€” better
Further details โ€” not scored
Size24 MB76 MB
Age rating12+12+
DeveloperAmita DhandMT Fitness OU

In-app purchases

2 purchases

Bivryn Biological Intelligence

Subscriptions2
  • Bivryn Premium Monthly7 Days trial$14.991 Month
  • Bivryn Premium Annual7 Days trial$99.991 Year
2 purchases

MARYN

Subscriptions2
  • MARYN Pro Monthly7 Days trial$19.001 Month
  • MARYN Pro Yearly7 Days trial$190.001 Year

Questions

Is Bivryn Biological Intelligence free?
Bivryn Biological Intelligence is free to download, with in-app purchases available.
Is MARYN free?
MARYN is free to download, with in-app purchases available.
Do Bivryn Biological Intelligence or MARYN have ads?
Neither Bivryn Biological Intelligence nor MARYN shows ads.
Which is updated more often, Bivryn Biological Intelligence or MARYN?
Bivryn Biological Intelligence ships an update every 11 days, and MARYN every 3 days. Most recently, Bivryn Biological Intelligence was updated on September 10, 2026 and MARYN on September 17, 2026.

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