Comparison

ImmGen vs USMLE

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

Head to head
About

ImmGen

Explore gene expression data across various immune cell types in mice and humans. Visualize expression levels with interactive heatmaps and bar charts. Discover correlated genes to understand cellular relationships.

Highlights
  • Gene expression heatmap barcodes
  • Visualize expression in cell lineages
  • Toggle between mouse/human datasets
  • Bar chart visualization
  • Gene constellation view
  • View correlated genes
Features
Read full description

Explore gene expression levels in different mouse and human immune system cells. Start by entering a gene name (or alias) in the search bar to see a list of hits you can swipe through. Searching will display a "heatmap barcode" that shows how hot or cold expression of that gene is across different immune system cell lineages (B cells, T cells, Myeloid cells, etc). Toggle between 3 different datasets: mouse RNA-seq, mouse microarray, and human RNA-seq. Press down on a cell lineage icon to see the same expression data visualized as a bar chart. Use the settings menu in the top right to toggle between a log and linear axis. In the microarray data, low expression values are partially occluded. Back on the main "heatmap barcode" screen, if you instead press the "Show related genes" button, you'll see a "gene constellation" view. This shows its most correlated genes within certain population groups. By default, correlation is shown with respect to key populations — these are key populations across the entire immune system. Please reach out to immgen@gmail.com for feedback or feature requests! The data are generated by the Immunological Genome Project, an international consortium supported by the National Institutes of Health (NIAID).

About

USMLE

Master medical school and the USMLE with a comprehensive resource app. Access board-style questions, interactive learning modules, flashcards, and videos. Study anytime, anywhere with cloud syncing and personalized study tools.

Highlights
  • Thousands of USMLE board-style questions
  • Nearly 800 eLearning modules
  • Over 14,000 flashcards
  • Over 80 hours of high-yield videos
  • Cloud syncing across devices
  • Spaced repetition study tool
Read full description

USMLE-Rx (by ScholarRx) Ready to own the USMLE and master medical school? Now you can access any high-yield USMLE-Rx tool in one great app!* Get on-the-go access to USMLE board-style questions, Rx Bricks, flash cards, and videos. Qmax: Study anytime, anywhere with your USMLE-Rx Qmax Subscription: · Thousands of high-yield Step 1 questions, images, and explanations · All your tests sync to the cloud for immediate access on any device · Quiz yourself in multiple test modes with different question types · Get detailed performance stats Rx Bricks · Nearly 800 high-yield, patient-centered eLearning modules · “Need-to-know” topics succinctly explained with simple "clear language" explanations, often in under 20 minutes · Clinical correlations, real-world stories, memorable mnemonics, and more · Assess your understanding with measurable objectives, interactive flashcards, and practice questions built into each module Flash Facts Learning is literally at your fingertips with Step 1 Flash Facts: · Over 14,000 flash cards help you nail USMLE Step 1 content quickly and efficiently · Case-based flash cards put basic science concepts in a clinical context · Study Stream uses spaced repetition to give you flash cards based on your own study schedule as well as your strengths and weaknesses · Daily reporting helps you track your progress · All your cards and progress sync to the cloud for immediate access on any connected device · Searchable by organ system, discipline, and topic Express Videos · Over 80 hours of high-yield videos, over 1,300 videos in all · 600+ images, helpful diagrams, and multimedia clips · Integrations across multiple topics form strong, lasting connections to help you in class and on test day *Requires a valid subscription to Rx360+, USMLE-Rx Step 1 Qmax or Step 2CK Qmax, Rx Bricks, Step 1 Flash Facts, and/or Express Videos. Terms and Conditions: https://www.usmle-rx.com/terms-and-conditions/ Privacy Policy: https://www.usmle-rx.com/privacy/

Screenshots

ImmGen4 screens
USMLE4 screens

Verdict

The call

The clearest difference is in-app purchases: ImmGen at none against USMLE's 1. ImmGen also leads on review sentiment (83% vs 49%) and rating (5.0 vs 4.7). USMLE's advantage is ratings volume (5K vs 13) and update cadence (every 6 weeks vs every 7 months). On price, ads 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. USMLE sells 1 in-app purchase, starting at $49.99 per month. ImmGen asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ImmGen holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: USMLE has 5K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 83% of ImmGen's written reviews are positive against 49% of USMLE's.

UpkeepUpdate frequency

ImmGen ships an update every 7 months, USMLE every 6 weeks. The most recent releases landed on September 21, 2026 and September 25, 2026 respectively.

Scorecard7 real differences · 3 level
ImmGen versus USMLE: the parameters behind the verdict, then further details
ParameterImmGenUSMLE
PriceFreeFree
Rating5.0 (13 ratings) — better4.7 (5K ratings)
Positive reviews83.3% of reviews — better48.9% of reviews
Number of ratings135K — better
Update frequencyEvery 7 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size74 MB40 MB
Age rating12+17+
DeveloperChristophe BenoistMedIQ Learning, LLC

Customer experience

ImmGen

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews12 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

USMLE

All ratings5,005 ratings
Positive93.2%
Neutral2.5%
Negative4.3%
Written reviews135 reviews
Positive48.9%
Neutral17.0%
Negative34.1%

In-app purchases

None

ImmGen

No in-app purchases

1 purchases

USMLE

Subscriptions1
  • RX360+$49.991 Month

Questions

Is ImmGen free?
ImmGen is free to download, with no in-app purchases.
Is USMLE free?
USMLE is free to download, with in-app purchases available.
Which has better reviews, ImmGen or USMLE?
ImmGen is rated higher. ImmGen averages 5.0 out of 5 from 13 ratings, while USMLE averages 4.7 from 5K ratings.
Do ImmGen or USMLE have ads?
Neither ImmGen nor USMLE shows ads.
Which is updated more often, ImmGen or USMLE?
ImmGen ships an update every 7 months, and USMLE every 6 weeks. Most recently, ImmGen was updated on September 21, 2026 and USMLE on September 25, 2026.

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