Programming
Algorithms & data structures.
Hash maps, recursion, DP, system design. Drill in Python, JS, SQL, or Go. Code runs in the page.
- Python
- JavaScript
- TypeScript
- SQL
- Git
- HTTP
- Testing
Subjects
A subject for every craft.
From algorithm puzzles to ear training, anatomy diagnostics to chess tactics, Immersh pairs every subject with the kind of practice that actually builds skill.
01, Subjects today
Eight subjects, hundreds of skills.
Each subject is a curated path: a set of skills, each with its own drills, sequenced so you build on what you already know. Mix and match across subjects, or go deep on one.
Music
Ear training & theory.
Intervals, chords, sight-reading, rhythm dictation. Sing it, tap it, play it on the on-screen keys.
- Intervals
- Chord Recognition
- Sight Reading
- Rhythm
- Scales
- Piano
- Guitar
Languages
Speak, read, conjugate.
Spanish, Mandarin, French, ASL. Speech-scored drills with native audio and live correction.
- Spanish
- Mandarin
- French
- ASL
- Vocabulary
- Conjugation
- Pronunciation
Medicine
Anatomy & diagnostics.
Case files, imaging reads, drug interactions. USMLE-style drills with rationale on every answer.
- Anatomy
- Pharmacology
- Diagnostics
- USMLE Prep
- Imaging
- Lab Values
Math
Algebra to calculus.
Step-graded proofs, interactive graphs, problem packs from Algebra 1 through real analysis.
- Algebra
- Geometry
- Calculus
- Linear Algebra
- Statistics
- Discrete Math
Chess
Tactics & endgames.
Daily puzzles tuned to your rating. Find the move, then see why it is the move.
- Tactics
- Openings
- Endgames
- Strategy
- Puzzles
- Notation
Design
Typography & color.
Hierarchy, kerning, contrast checks, palette drills. Train your eye the way pros do.
- Typography
- Color
- Hierarchy
- Kerning
- Composition
- Contrast
Writing
Grammar to craft.
Mechanics, structure, voice. Short prompts that build the muscle, with feedback you can actually use.
- Grammar
- Vocabulary
- Style
- Structure
- Editing
- Rhetoric
More on the way
+8
and counting.
Stats, finance, law, security, and more.
02, Inside every subject
The same engine. Tuned to the craft.
Whatever subject you pick, the building blocks are the same: active drills, instant feedback, and a path that adapts to where you actually are.
- Interactive drills tuned to the medium: type the code, play the note, speak the phrase, diagnose the case
- Spaced repetition that brings the right skill back before you forget it
- AI feedback on every answer, including why a wrong one was wrong
- Mastery tracking by skill, so you can see exactly where you stand
- Mix subjects in a single session, or focus on one until it sticks
Pick a subject. Start drilling.
Free forever, no credit card. Add a paid plan when you outgrow the basics.