For Preclinical Medical Students

Your professor,
available 24/7.

Upload your professor's PDF slides, handwritten notes, or iPhone voice memo from class. Siffr learns exactly what your professor teaches, how they test, and where your gaps are, then builds your personalized study plan automatically.

SMPDJ
Joining MS1 and MS2 students across the US · No credit card
ENDOCRINOLOGY
Lecture 4
GAP CONCEPT
TSH in primary vs central hypothyroidism
Your professor says:
“TSH rises in primary hypothyroidism because the thyroid fails and the pituitary compensates by pushing out more TSH. In central hypothyroidism, the pituitary itself fails, so TSH is low or inappropriately normal.”
Key facts your professor wants you to know
TSH up usually points to primary thyroid failure
TSH low or normal can point to central disease
Axis: TRH to TSH to T3/T4 with feedback
PDF slidesVoice memoHandwritten notes
Upload any format. Siffr handles the rest.
Scroll to see how it works
The Siffr difference

Siffr doesn't teach medicine.
It teaches your medicine.

Every question, every explanation, every study plan is built from what your professor specifically taught. Not a generic curriculum. Your curriculum. Just how your professor will test it.

Professor intelligence
Siffr reads your lecture slides, recordings, and notes, extracting every concept your professor specifically emphasized in their voice and framing.
Gap detection
A rapid 5-minute diagnostic quiz identifies exactly what you know and what you are missing before you waste hours studying the wrong things.
Exam prediction
Siffr detects emphasis signals and prioritizes what your professor is most likely to put on your exam.
Works with everything

However your professor teaches,
Siffr understands it.

Upload your lecture materials in any format. Siffr extracts every testable concept whether your professor uses slides, speaks in class, or you take handwritten notes.

PDF Notes
Lecture slides, typed notes, study guides
.PDF
PowerPoint Slides
Upload .pptx files directly. Siffr reads every slide.
.PPTX
New
Handwritten Notes
Photo your notebook. Siffr reads your handwriting.
.JPG .PNG
Popular
Voice Memo
Record your professor on iPhone. Upload the M4A directly.
.M4A .MP3 .WAV
Mix and match formats for the same lecture.
Upload your professor's PDF slides and your handwritten notes and an iPhone recording together. Siffr combines them into one comprehensive study session.
See it in action

From lecture to mastered.
In one session.

Upload any lecture file. Siffr reads your professor's content in seconds. Your gaps are identified in 5 minutes.

Endocrinology — Pituitary Lecture.pdf
Reading your professor's notes...
The comparison

Finally, a study tool that
knows what you don't.

✕Without Siffr
✕Re-reading slides that feel productive but do not stick
✕Making Anki cards for 3 hours before you have studied the material
✕Generic question banks not built from your professor’s lectures
✕Discovering your gaps on exam day
✕Guessing what is high yield
✕Forgetting everything by the next block
✓With Siffr
✓Questions written from your professor’s exact notes and framing
✓Zero setup. Upload and study in about 60 seconds
✓Gaps identified before you open a textbook
✓Exam prediction based on emphasis signals
✓Spaced repetition scheduled automatically
✓Your concept library compounds all semester
The process

Four steps.
One session.

01
Upload your lecture
Drop in your PDF slides, PowerPoint, iPhone recording, or photo of notes.
02
See your gaps
A 5-minute quiz finds exactly what your professor’s lecture did not make stick.
03
Learn what you missed
Siffr teaches you in your professor’s voice and then retests you immediately.
04
Never forget
Reviews are scheduled automatically so your knowledge compounds all semester.

Common questions.

Re-reading feels productive but research consistently shows it is one of the least effective study methods because familiarity masquerades as learning. Siffr forces active recall from the moment you upload. The diagnostic quiz is not just a test. It is the studying. You discover more gaps in 5 minutes of Siffr than in 30 minutes of re-reading.
PDF lecture notes, PowerPoint slides (.pptx), photos of handwritten or printed notes (JPG, PNG), and audio recordings including iPhone voice memos (M4A), MP3, and WAV. You can also combine multiple formats for the same lecture.
Siffr analyzes emphasis patterns in your lecture content: repetition, framing, key fact density, and the way your professor explains distinctions. Those signals combine into a priority score that helps predict what is most likely to appear on your exam.
Yes. Upload your Renal block, Cardiology lectures, Biochem notes, or Endocrine recordings. Each lecture becomes its own study session grounded in what was actually taught, and the concept library compounds all semester.
About 60 seconds. Upload your lecture file, give it a title, and submit. Siffr processes it in the background with no curriculum setup and no flashcard authoring. Your quiz is typically ready in about 30 seconds.
Not for dedicated Step 1 prep. UWorld is still valuable then. Siffr is built for preclinical, helping students enter dedicated already knowing their weak systems and the professor-grounded concepts that never fully clicked.
Yes. Your lecture content, concept library, and study behavior are private to your account. We do not sell your data or share it with third parties. Your professor persona and your student persona stay yours.
Get early access

Start building both personas:
your professor and your study self.

Siffr learns what your professor emphasizes and how you actually perform. The result is a study system that feels less like software and more like a relationship with your course.

Your professor just got
a lot more available.

Upload your first lecture free.
No credit card. No setup.
5 minutes to your first insight.

Already have an account? Sign in →