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Only Pro takes a card. The trial does not charge for seven days. Cancel before it ends to avoid a charge.

Guestno account
$0
2 sessions total in this browser
Two complete six-stage sessions
167 topics for guided AI sessions
30 authored technical references to read
No email, no card, no profile
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Freesign in
$0
8 sessions per calendar month
8 sessions a month, no card
Saved threads you can resume
Mastery evidence and an adaptive review queue
12 retrieval evaluations a month
5 practice-lab code reviews a month
Revision cards
Optional resume context for worked examples
Create a free account
Pro7-day trial
$9 / month
Unlimited sessions
Unlimited review sessions
Unlimited practice-lab code reviews
Unlimited retrieval evaluations and mastery history
Everything in Free
New topics ship to Pro first
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A session is one topic explored across six stages. Guest sessions are a one-time allowance; Free session, retrieval, and code-review allowances reset each calendar month. Reading the authored references does not use a session.

Study deeply. Publish clearly.

Study + Studio combines Study Pro with Studio Publish’s figure sets, batch exports and PowerPoint decks. $15/month total, replacing your existing plan. Study alone stays $9/month.

No second subscription. Review the new total and any prorated amount in Stripe before confirming. The combined plan has no free trial.

$15/ month total

Frequently asked

What counts as a session?

A session is a single 6-stage review run on one topic, started from your dashboard. Continuing or reloading an existing session does not consume a new session credit.

How does the free trial work?

You enter a card when starting your Pro trial. You will not be charged for 7 days. If you cancel before the trial ends, you pay nothing. After 7 days the subscription renews at $9/month until you cancel.

Can I cancel anytime?

Yes. Open Profile and choose Manage billing to cancel securely with Stripe, update your payment method, or download invoices. You keep Pro access until the end of your current trial or billing period. If you need help, email liminalmlprep@gmail.com.

Do you offer a promo or student discount?

Occasionally. If you have a promotion code (from a partner site, launch promo, or referral), enter it on the Stripe checkout page. Students and open-source contributors can email liminalmlprep@gmail.com.

What happens to my data if I downgrade?

Downgrading does not delete your saved profile or sessions. When Pro access ends, the Free allowances apply: 8 sessions, 5 practice-lab reviews, and 12 retrieval evaluations per calendar month.

What payment methods are supported?

All major credit and debit cards, plus Apple Pay, Google Pay, and Link, via Stripe Checkout. Stripe never shares your card details with us.

Which model powers LiminalML? Can it be wrong?

LiminalML is built on Claude via the Anthropic API. Like any LLM it can be confidently wrong — sessions are structured so every derivation step is visible and checkable, and anything load-bearing should be verified against a primary source. The six-stage structure, pacing, and saved sessions around the model are what we build.

Is my resume / chat history private?

Study stores account data in Supabase with access controls scoped to your user ID. Relevant profile context, messages, answers, and code are sent to Anthropic when generating feedback. We do not train models on your content. You can edit profile content and delete sessions in the app, or contact support for account export or deletion. Our Privacy page explains processors, analytics, and Studio sharing.

Still have questions? Email us.