Lanthier vs SURF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lanthier
Access up-to-date internal medicine information and guidelines quickly and efficiently. This app offers a fast search function, intuitive menus, and direct links to PubMed references. It's designed for physicians, residents, and medical students to use at the bedside.
- Concise bedside information
- Advanced search function
- Intuitive menus
- Direct links to PubMed
- Personal note-taking
- Cross-device synchronization
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“Lanthier” is an internal medicine app based on the seventh edition of the bestselling pocketbook. Completely re-imagined for iOS, this app will allow any physician, resident or medical student to access up-to-date medical information and guidelines quickly and efficiently. Free 7 days trial subscription! “Lanthier Practical Guide to Internal Medicine is a good choice for an app to replace your pocketbook. Beyond providing quality content with references, it has an excellent design that makes it more than just a digitized version of a book. Finding clinically relevant information about a condition is quick and easy.” iMedicalApp.com — FEATURES — • Concise: edited to be useful at the bedside. • Fast: advanced search function, intuitive menus. • Direct link to the references on PubMed and now through Read by QxMD (internet connection required). Build your paper collection using articles selected by Dr Lanthier himself. • MedCalX integration (sold separately): for quick access to the trusted medical calculator. • Take personal notes within the topics and synchronize them across your iOS devices. Perfect for studying for board exams! — TOPICS — Cardiology Dermatology (new) Endocrinology Gastroenterology General Internal Medicine Hematology Infectious Diseases Nephrology Neurology Oncology Pneumology Rheumatology — ABOUT THE LEAD AUTHORS — Dr Luc Lanthier practices General Internal Medicine at the Sherbrooke University Hospital Center and is a Professor of Medicine at the Faculty of Medicine and Health Sciences of the University of Sherbrooke. He is former chair of the French Examination Board for Internal Medicine Exam at the Royal College of Physicians and Surgeons of Canada. Dr Donald Echenberg practices General Internal Medicine at the Sherbrooke University Hospital Center and is an Associate Professor of Medicine at the Faculty of Medicine and Health Sciences of the University of Sherbrooke. He is past president of the Canadian Society of Internal Medicine and is currently Governor of the Quebec Chapter of the American College of Physicians. — DISCLAIMER — This publication (application) is to be used as a guide only. It is intended only for use by licensed medical practitioners and medical students. Every doctor (or prescriber) is responsible for their actions. Therapeutic options presented in this guide reflect current approaches and guidelines in the field of internal medicine. Content has been peer reviewed by leading experts in their respective fields. The authors of Lanthier - Practical Guide to Internal Medicine shall not be liable for any injury and/or damage to persons or property arising from the use of this application. This guide is not meant to replace clinical judgment. It is the responsibility of the licensed prescriber to verify the indications, contraindications and dosage of the medication (and actions) they prescribe. — ABOUT SUBSCRIPTION — Lanthier - Internal Medicine is offered as a subscription service, renewed automatically. Payment will be charged to iTunes Account at confirmation of purchase. The subscription will automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. The iTunes Account will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the application «Settings» section and tapping «Manage Subscriptions» after purchase. For more information on Terms of Use visit https://lanthiermed.com/terms-of-use
SURF
Access evidence-based medical content for internal medicine, differential diagnosis, and lab values. This comprehensive guide is designed for residents, general practitioners, and specialists, offering a vast amount of information from multiple expert-authored books.
- Evidence-based medical content
- Differential diagnosis of symptoms
- Lab value interpretation
- Comprehensive internal medicine
- Links to external calculators
- Accessible on multiple devices
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Abonnez-vous à SURF pour accéder au contenu basé sur l’évidence de SURFmed, Labo-SURF, INVESTI-Med et INTOXI-SURF, quatre ouvrages indispensables pour les résidents, omnipraticiens et médecins spécialistes. Livre de référence en médecine interne générale depuis 20 ans, SURF est devenu un outil de travail incontournable, aussi bien en Europe qu’en Amérique du Nord! Une vraie légende! Ce guide thérapeutique irremplaçable contient une masse d’information faramineuse en englobant le contenu de pas moins de quatre livres écrit par le Dr Philippe Furger avec l’aide de plus de 230 collaboratrices et collaborateurs. Le contenu de cette application englobe l’ensemble de la médecine interne générale ainsi que le diagnostic différentiel des symptômes les plus fréquents et celui des valeurs de laboratoire. L’abonnement vous donne accès au contenu sur un maximum de deux appareils. BÉNÉFICES Aspect pratique hors norme – il n’y a pas de place au hasard! Compact et convivial Basé sur l’EBM (evidence-based medicine - médecine fondée sur les faits) avec plus de 3500 références Nombreux liens web, permettant par exemple de calculer les différents scores CONTENU Réanimation Unité de soins intensifs Cardiologie - angiologie Pneumologie Gastro-entérologie Neurologie Néphrologie / dysélectrolytémies Endocrinologie Infectiologie Oncologie Rhumatologie Dermatologie ORL Radiologie Douleurs Gériatrie Psychiatrie Pharmacologie clinique Urologie - Gynécologie Valeurs normales de laboratoire A PROPOS DE L’AUTEUR Dr Philippe Furger est spécialiste en médecine interne et en médecine (FMH) de plongée et hyperbare en Suisse. Depuis 2001, il est professeur invité à l’unité d’enseignement de l’Université Laval à Québec. A l’Université de Berne en Suisse, il était chargé de cours pendant plus de 10 ans, est expert et auteur des examens fédéraux de médecine. En 2006, il a terminé la formation d’éducateur médical continu (CME) à Harvard/Boston avec son concept réalisé sur les diagnostics différentiels en médecine générale (INVESTI-MÉD©). Depuis 1998, le Dr Ph. Furger a publié plus de 70 livres de médecine et deux pour le grand public (33 Histoires racontées par des médecins). A PROPOS DE L’ABONNEMENT SURF - Guidelines en médecine interne générale est distribuée sous forme d’abonnement annuel, renouvelable automatiquement. Les frais reliés à l’abonnement seront portés à votre compte iTunes lorsque vous confirmerez votre achat. L’abonnement se renouvellera automatiquement sauf si vous désactivez la fonction de renouvellement automatique au moins 24 heures avant la fin de la période actuelle d’abonnement. Vous pouvez modifier les conditions de votre abonnement en vous rendant dans la section “Gérer l’abonnement” dans la section “Réglages” de l’application. Pour plus d’information sur les conditions d’utilisations visitez le https://surfmed.co/terms-of-use
Screenshots
Verdict
The clearest difference is update cadence: Lanthier at every 2 months against SURF's every 5 months. On price, review sentiment, ads and in-app purchases 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. Lanthier sells 2 in-app purchases, starting at $19.49 per year and SURF sells 1 in-app purchase, starting at $99.99 per year. Whichever you choose, the download price is not the number that matters.
Lanthier ships an update every 2 months, SURF every 5 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.
| Parameter | Lanthier | SURF |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (5 ratings) — better | — |
| Positive reviews | 61.9% of reviews | 66.7% of reviews — better |
| Number of ratings | 5 — better | — |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Subscription |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 70 MB | 204 MB |
| Age rating | 17+ | 17+ |
| Developer | Les Éditions Formed inc. | Philippe FURGER |
Customer experience
Lanthier
SURF
In-app purchases
Lanthier
- Lanthier - current users3 Months trial$19.491 Year
- Lanthier - new users7 Days trial$19.491 Year
SURF
- 1 year$99.991 Year








