Sam is one. He builds 3D models to explain concepts, grades your essays before your teacher does, and remembers what tripped you up last week.
No signup. No download. Just paste and go.
You ask about orbital mechanics. Sam builds you a solar system. You're confused about bond angles? He renders the molecule. All mid-conversation, all interactive.
All 8 planets with NASA textures, orbiting the Sun. Click any planet for info.
H₂O molecular structure with bond angles and atomic labels.
C₆H₆ aromatic structure with alternating double bonds.
| ChatGPT | Quizlet | Anki | Sam | |
|---|---|---|---|---|
| Remembers your weak spots next week | × | × | × | ✓ |
| Builds 3D models to explain concepts | × | × | × | ✓ |
| Grades essays with paragraph feedback | × | × | × | ✓ |
| Turns notes into flashcards automatically | × | × | × | ✓ |
| Spaced repetition (FSRS algorithm) | × | × | ✓ | ✓ |
| Timed practice exams with AI reports | × | × | × | ✓ |
| Works offline | × | ✓ | ✓ | ✓ |
ChatGPT has no memory. Anki doesn't talk. Sam does both — and carries it forward. Open him next week and he already knows you struggled with osmosis, your exam is Friday, and what to prioritize first.
Snap a photo of your notes, drop a PDF, paste text — Sam turns it into study-ready flashcards. 8 question types. Done before your coffee's cold.
Not a chatbot that dumps a wall of text. Five modes — Socratic guides you to the answer, Teach makes you explain it back. Sam draws diagrams and builds 3D models on the fly.
15 essay types — Charakterisierung, Erörterung, argumentative, analytical, and more. Sam marks up every paragraph with what works, what doesn't, and how to fix it.
FSRS — the algorithm that replaced Anki's SM-2 — decides when you'll forget something. Usually before you do. Reviews are scheduled automatically.
Built by a student in Munich who needed exactly this. No VC funding. No ads. No dark patterns. Read the story ↓

Student in Munich, Germany
My friends were spending more time making flashcards than actually studying. Juggling ChatGPT, Anki, Quizlet, and three other apps. Handing in essays nobody checked first.
So I built Sam. One app that does all of it. An AI tutor that actually teaches you — not just dumps answers. That remembers your weak spots next week. That grades your essay before your teacher does.
No VC funding. No dark patterns. No ads. Just a student who needed this and decided to build it.
Sam is free. He remembers everything. And he's ready when you are.