Osmosis
by Osmosis
Animated concept videos with a large free YouTube library
✓Pros
- ✓Excellent animated explanations of tough concepts
- ✓Large free YouTube library
- ✓Integrated videos, flashcards, and questions on Prime
- ✓Strong for visual learners
✗Cons
- ✗Full platform (Prime) is a paid subscription
- ✗Less exam-specific than Pathoma or Boards & Beyond
Highlights
- ✓Animated concept videos (many free on YouTube)
- ✓Spaced-repetition flashcards and questions (Prime)
- ✓Study schedule tools (Prime)
Price
$399
What Students Are Saying
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Expert Rating
When a concept just won't click, a good animation can do what a wall of text can't. Osmosis is known for exactly that — clear animated medical videos, with a large free library on YouTube.
This review covers what Osmosis offers free versus paid and where it fits in Step 1 prep.
Summary Table
| Feature | Osmosis |
|---|---|
| Price | Free videos; Prime ~$399/yr |
| Format | Animated videos + flashcards + Qs |
| Free Tier | Large YouTube library + trial |
| Strength | Visual concept explanations |
| Exam-Specific? | Less than Pathoma/B&B |
| Best Use | Visual supplement for tough topics |
Osmosis Overview
Animated concept videos with a large free YouTube library
Osmosis pairs animated concept videos with flashcards, questions, and study tools. A substantial chunk of the video library is free on YouTube, while the full integrated experience (Osmosis Prime) is a paid subscription around $399/year.
The animations are the draw — they make mechanisms and pathophysiology genuinely intuitive, which is where visual learners benefit most.
What you get:
- Animated concept videos (many free on YouTube)
- Spaced-repetition flashcards and questions (Prime)
- Study schedule tools (Prime)
Osmosis Review For 2026
The Free Library
You can get a lot of value without paying: search a topic on the Osmosis YouTube channel and you'll usually find a clear animated explainer. It's a strong free backup when Pathoma or your notes leave a concept fuzzy.
A free trial lets you sample the Prime flashcards and questions before deciding.
Where It Sits
For Step 1 specifically, Pathoma and Boards & Beyond are the more exam-targeted video courses. Osmosis tends to be a supplement rather than a primary curriculum.
If you love its style, Prime can consolidate videos, flashcards, and questions in one place — but it's not required.
Cost
Osmosis has a large free YouTube library and a free trial. The full platform, Osmosis Prime, is a paid subscription of roughly $399/year.
Who Osmosis Is Best For
- Visual learners who like animated explanations
- Students wanting a free video backup to Pathoma
- Anyone who wants videos, flashcards, and Qs in one app
When You Might Look Elsewhere
- You want the most exam-targeted videos (use Pathoma/B&B)
- You only want free resources (stick to the YouTube library)
Final Verdict
Osmosis is a polished, visual supplement with a genuinely useful free tier.
Use the free videos to unstick hard concepts, and reserve a Prime subscription for those who love the format.
Start with the free Osmosis videos on YouTube and only pay for Prime if the format works for you.
Osmosis FAQs
Is Osmosis free?
Much of the video library is free on YouTube, plus a free trial. The full platform (Osmosis Prime) is a paid subscription (~$399/year).
Is Osmosis enough for Step 1?
It's best as a visual supplement. Most students use Pathoma and Boards & Beyond as primary videos, with Osmosis as backup for tough concepts.
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Our Verdict
A great free-to-sample visual supplement. The YouTube library alone helps when a concept won't click, though most students use Pathoma and Boards & Beyond as their primary videos and treat Osmosis as backup.