Most studying leaks. You miss something, you move on, it comes back on test day. Mobius is built so a miss has nowhere to go but closed.
Fresh questions, every day
Mobius writes original AAMC-style passages and discretes. Not a bank. Not recycled.
Chem/PhysQ 4 of 7
A weak acid has pKa 4.7. At pH 4.7, what is the ratio of conjugate base to acid?
A10 to 1
B1 to 1
✕
You drill. You miss one.
Wrong answers are the whole point. This is where the loop starts.
Which describes competitive inhibition?
BKm falls, Vmax unchanged ✕
DKm rises, Vmax unchanged ✓
Two minutes on exactly why
Not an answer key. A tutor that asks what you were thinking and finds the real misconception.
You picked B. What do you think pKa tells you here?
…that a lower pKa means the acid is stronger?
Close. Lower pKa does mean stronger acid. Let's pin down why that flips your ratio.
Mobius writes it down
Not "missed question 14." The actual gap: pKa versus acid strength, inverted. It goes on your list.
pKa ↔ acid strength · Gen Chem
Tomorrow's questions lean on your gaps
Spaced repetition biases new questions toward what you missed. Answer it cold a few times and the gap moves to done.
pKa ↔ acid strength open→✓ closed
↺
And the next set already knows you. The loop closes.
The part every other tool skips.
Chat tools can teach but forget you between sessions. Drill apps remember your mistakes but never explain them. The loop only works if one system does both.
A chat tool
Explains anything you ask. Then the tab closes and it has no idea what you missed yesterday.
Teaches. Doesn't remember.
A drill app
Tracks your error log forever. But when you ask why you got it wrong, it shows you the answer key.
Remembers. Doesn't teach.
Mobius
Teaches you in the moment you miss, remembers the exact gap, and aims tomorrow's questions at it.
Teaches. Remembers. Closes.
What a study session looks like.
No streaks, no confetti, no leaderboard. A question, a conversation when you need one, and a list that gets shorter.
Chem/Phys · Passage 2Q 4 of 7
A buffer is made with equal weak acid and conjugate base (pKa 4.7). A small amount of strong base is added. What happens to the pH?
Other tools cap how many mistakes they'll track, and stop at the answer key. Mobius tracks every gap and teaches through each one. Cancel anytime.
Fair questions.
Are the questions actually AAMC quality?
They're generated to AAMC's style: passage structure, distractor logic, and section blueprints, then filtered through a quality gate before you ever see them. If a question is below the bar, it doesn't ship. You can also flag any question, and flagged items sharpen the gate.
How is this different from just using ChatGPT?
A chat tool starts from zero every session. Mobius keeps a structured record of every gap you've shown, biases new questions toward them, and tracks each one to closed. The teaching is similar. The memory is the product.
What exactly is a tracked gap?
When you miss a question, a short conversation pins down the specific misconception, not just the topic. That misconception becomes a gap: it resurfaces in future questions on a spaced schedule until you've answered it cold enough times to close it.
What does the free plan actually include?
Real drilling every day, tutoring on misses, and your first 15 gaps tracked through the full loop. It's the whole product with a smaller memory. No card required.
What do I get when I go Pro?
Your gap list goes unlimited, so nothing you miss falls off the radar. Tutoring and question generation move to frontier models for sharper explanations and harder, cleaner items. Pro is $25/month, or $159/year if you're studying for a few months and want to save 47%.
Can I cancel anytime? Refunds?
Yes. Cancel in one click from Account → Manage billing; you keep Pro until the end of the period you already paid for, then drop to Free with your gaps intact. If something's wrong in the first 7 days of a new subscription, email us and we'll refund it.
Does it work on my phone?
Yes. Mobius is built mobile-first: drill, tutoring, and your gap list all work on a phone in a browser, no app install. Drill on the bus, review gaps in line, pick up on your laptop where you left off.
What happens to my data and my gaps?
Your gaps and progress are tied to your account and sync across devices. We don't sell your data or train public models on it. You can export everything or reset your progress from Account at any time. See our Privacy Policy.
I'm six weeks out. Is it too late to start?
Six weeks of closed gaps beats six weeks of rereading. Mobius prioritizes your highest-yield gaps first, so short runways are exactly when targeting matters most.
A small team that actually uses it.
No investors telling us to add streaks. One of us builds AI systems for a living. The other is deep in MCAT prep right now. Mobius is the overlap.
The engineer
Data & LLMOps Engineer at Microsoft
Builds the question generation, the quality gate that filters every item, and the memory that actually tracks what you miss. The reason the AI side is real and not a thin wrapper.
The premed
Taking the MCAT right now
Lives the problem every day and pressure-tests every question and screen against a real study schedule. Nothing ships that wouldn't help on test day.
Independent and self-funded. Not affiliated with or endorsed by Microsoft or the AAMC.
Your gap list is shorter than you think.
Most people are a few dozen closed gaps away from their score. Start finding yours tonight.