Comparison

Bllod vs N4S

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

Head to head
About

Bllod

Features
Read full description

Bllod is the health companion for anyone who has ever stared at a blood test report and wondered what the numbers really mean. Upload a PDF from your lab, scan a paper report with your camera, or enter markers by hand — Bllod extracts your values, matches them to reference ranges, and turns them into clean charts you can actually read. No more spreadsheets. No more doctor's-Google spirals. Just your health, organized. — WHAT BLLOD DOES — • Decodes any lab report — PDFs from major labs or a quick photo of a printout. Bllod reads the markers for you. • Tracks every marker over time — cholesterol, glucose, vitamin D, thyroid, iron, CBC, and 200+ more — with trend charts you'll actually use. • Explains what each marker measures in plain language, so you walk into your next appointment prepared. • Flags what's out of range against personal reference ranges, not just generic ones. • Gives you a Health Score snapshot — one glance tells you whether everything is on track. • Respects your privacy. Your data is yours. It's encrypted, linked only to your account, never sold, never used for ads. — WHO IT'S FOR — Bllod is for people who want to take their own health seriously: patients managing chronic conditions, athletes optimizing performance, biohackers chasing longevity, and anyone who has ever thought "I should really understand these results." — IMPORTANT — Bllod is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional about your results. — PRIVACY & SECURITY — • End-to-end encryption on sensitive data • Sign in with Apple or Google — your choice • No tracking across other apps or websites • Delete your account and all data with one tap — GET STARTED — Create your account, upload your first report, and see your health take shape in under a minute. Terms of Use: https://www.bllod.com/terms Privacy Policy: https://www.bllod.com/privacy

About

N4S

This app creates precise, gram-accurate nutritional plans tailored to your health conditions, fitness level, and goals. It automatically re-evaluates your needs based on your progress and offers personalized hydration reminders. Access certified nutritionists and receive automatic grocery lists.

Highlights
  • Gram-accurate personalized nutrition plans
  • Automatic re-evaluation based on progress
  • Covers 35+ clinical pathologies
  • Personalized hydration tracking
  • Automatic grocery list generation
  • Access to certified nutritionists
Features
Read full description

N4S - Se Nourrir est une Science N4S est la seule application française qui combine pathologies cliniques, profil sportif et réévaluation automatique dans un plan nutritionnel précis à la gramme. PERSONNALISATION TOTALE Votre plan est généré selon votre poids, taille, IMC, objectif, sport pratiqué, niveau d'intensité et pathologies médicales. Pas de plan générique : chaque utilisateur a son propre programme. RÉÉVALUATION AUTOMATIQUE À J13, l'application recalcule automatiquement vos macronutriments, votre hydratation et vos quantités selon vos résultats réels. Tout évolue avec vous. PRÉCISION CLINIQUE Base nutritionnelle Ciqual ANSES officielle. Calculs selon les coefficients d'Atwater et les équations de Harris-Benedict. 218 aliments, 171 recettes calibrées. 35+ PATHOLOGIES COUVERTES Diabète, insuffisance rénale, pathologies cardiovasculaires, troubles digestifs, endométriose, thyroïde, cancérologie et bien d'autres. Chaque condition a ses propres coefficients. HYDRATATION PERSONNALISÉE Objectif hydrique calculé individuellement en ml/jour selon votre profil sportif et médical. Rappels à 11h et 18h. ACCÈS AUX EXPERTS Consultez des nutritionnistes certifiés directement depuis l'app. Conférences mensuelles en ligne animées par Nicolas Dehayes et les experts partenaires. LISTE DE COURSES AUTOMATIQUE Générée et organisée par catégories selon votre plan actif. Prêt à cuisiner en un tap. Conditions générales d'utilisation (EULA) : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Bllod4 screens
N4S4 screens

Verdict

The call

The clearest difference is in-app purchases: N4S at none against Bllod's 4. N4S also leads on update cadence (weekly vs every 3 weeks). On price, ads, device support 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. Bllod sells 4 in-app purchases, starting at $6.99 per month. N4S asks for nothing beyond the download.

UpkeepUpdate frequency

Bllod ships an update every 3 weeks, N4S weekly. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 6 level
Bllod versus N4S: the parameters behind the verdict, then further details
ParameterBllodN4S
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad — betteriPhone
Requires iOS16.416.4
Further details — not scored
Size111 MB57 MB
Age rating12+12+
DeveloperYan FrancaNicolas Dehayes

In-app purchases

4 purchases

Bllod

Subscriptions4
  • Bllod Plus (Monthly)$6.991 Month
  • Bllod Pro (Monthly)$14.991 Month
  • Bllod Plus (Annual)$39.991 Year
Show 1 more
  • Bllod Pro (Annual)$89.991 Year
None

N4S

No in-app purchases

Questions

Is Bllod free?
Bllod is free to download, with in-app purchases available.
Is N4S free?
N4S is free to download, with no in-app purchases.
Do Bllod or N4S have ads?
Neither Bllod nor N4S shows ads.
Which is updated more often, Bllod or N4S?
Bllod ships an update every 3 weeks, and N4S weekly. Most recently, Bllod was updated on November 9, 2026 and N4S on October 31, 2026.

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