Comparison

DiagnosUs vs Lions SightFirst Lecturio

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

Head to head
About

DiagnosUs

Engage with real medical cases to enhance your diagnostic skills and earn rewards. This educational game is designed for students and professionals to test their knowledge across various specialties and contribute to AI research.

Highlights
  • Analyze diverse medical cases
  • Improve diagnostic skills
  • Earn rewards for participation
  • Contribute to AI research
  • Study for medical exams
  • Regularly updated datasets
Read full description

DiagnosUs is an educational game for medical students, doctors, premed students, other healthcare professionals, and citizen scientists to analyze medical cases, improve their skills, and earn prizes! Participation is open to anyone, regardless of educational background. Players compete against their peers to hone their skills by analyzing cases in our datasets. At the same time, they contribute their knowledge to help advance artificial intelligence research. DiagnosUs is a wonderful supplement for classes, clerkships, and in preparation for exams such as the USMLE® Step 1 & 2 Clinical Knowledge (CK), NBME® exams, MBBS, NCLEX® exams, COMLEX Level 1 & 2, MCAT®, NEET-PG, and many more! The app promotes an engaging, dynamic platform to test anyone’s medical knowledge while simultaneously contributing to the development of crucial machine learning algorithms. Try a wide range of cases in subjects such as radiology, dermatology, USMLE® preparation, MCAT® preparation, NBME® preparation, NCLEX® preparation, ultrasound, neurology, cardiology, ophthalmology, emergency medicine, surgery, internal medicine, pediatrics, orthopedics, family medicine, gastroenterology, pathology, and pulmonology. Utilize the power of DiagnosUs to study interactively! New datasets are added regularly, so players can always keep learning! Learn medicine fast: see a wide range of cases! - Anatomy - Physiology - Auscultation to listen for pulmonary abnormalities - Dermatological images to identify melanoma, basal cell carcinoma, squamous cell carcinoma, psoriasis, dermatitis, and other skin conditions - EEG - EKG / ECG - USMLE® practice questions - MCAT® practice questions - NBME® practice questions - Chest X-rays to look for pneumonia and cancer - Musculoskeletal X-rays - Ultrasound identification problems - Fundus eye images - MRI - Whole Slide Pathology Imagery - Chest CT - Mammograms and much more! The rewards that participants can earn in the app are made possible by our research partners and customers, who are developing artificial intelligence related to image analysis. These research partners and customers subsidize our prizes because our app participants help analyze images from large datasets of our research partners and customers. After participants win rewards, they can tap on the Profile tab and tap on the icon in the top-left corner of the Profile screen. This screen then shows a log of all the participant's rewards, and they can withdraw their rewards to a payment account.

About

Lions SightFirst Lecturio

Features
Read full description

Welcome to Lions SightFirst Lecturio, your online academy. Features: - Video lectures: Learn & review all relevant concepts faster, easier - Learning Material: Download a PDF of any lecture’s slides for later reference - Qbank Tests: Apply your knowledge and solve clinical case questions - Spaced Repetition Quiz: reinforce knowledge, driven by a smart learning algorithm - Bookmatcher: Find the right videos for your text book - Bookmarks: Organize lectures in your own lists - Study planner: Plan your learning goals - Text Book Articles: Deepen and reinforce your knowledge - Learning progress control: Check your progress for each course - Synchronization between all devices: Simply continue learning seamlessly on another device - Offline availability: Learn on the go - Notes: Create notes about your lectures - Playback speed: Adjust the speed of the videos to your learning speed

Screenshots

DiagnosUs4 screens
Lions SightFirst Lecturio4 screens

Verdict

The call

The clearest difference is update cadence: DiagnosUs at fortnightly against Lions SightFirst Lecturio's every 13 months. On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DiagnosUs ships an update fortnightly, Lions SightFirst Lecturio every 13 months. The most recent releases landed on October 22, 2026 and October 13, 2026 respectively.

Scorecard1 real difference · 9 level
DiagnosUs versus Lions SightFirst Lecturio: the parameters behind the verdict, then further details
ParameterDiagnosUsLions SightFirst Lecturio
PriceFreeFree
Rating4.8 (1K ratings) — better—
Positive reviews79.4% of reviews—
Number of ratings1K — better—
Update frequencyFortnightly — betterEvery 13 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size42 MB117 MB
Age rating17+17+
DeveloperCentaur LabsLecturio GmbH

Bugs and requests

DiagnosUs

Reported bugs

4 issues
  • App crashes and freezes
  • Inaccurate or inconsistent grading of answers
  • Withdrawal and payment issues for some users
  • Compatibility problems with certain devices and OS versions

Requested features

5 requests
  • More diverse medical topics and case studies
  • Separate competitions for students vs. professionals
  • Ability to discuss and provide feedback on cases
  • Improved instructions and explanations
  • Compatibility with older devices and iOS versions

Lions SightFirst Lecturio

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

DiagnosUs

No in-app purchases

None

Lions SightFirst Lecturio

No in-app purchases

Questions

Is DiagnosUs free?
DiagnosUs is free to download, with no in-app purchases.
Is Lions SightFirst Lecturio free?
Lions SightFirst Lecturio is free to download, with no in-app purchases.
Do DiagnosUs or Lions SightFirst Lecturio have ads?
Neither DiagnosUs nor Lions SightFirst Lecturio shows ads.
Which is updated more often, DiagnosUs or Lions SightFirst Lecturio?
DiagnosUs ships an update fortnightly, and Lions SightFirst Lecturio every 13 months. Most recently, DiagnosUs was updated on October 22, 2026 and Lions SightFirst Lecturio on October 13, 2026.

Other comparisons