Picture this

Who it is for

Jun studies Solidity nightly. Memory Palace logs mastered cards and streaks, and lets him sell his polished deck to others.

Two ways to own it

What you get

Base$159

$40 deposit to reserve

Deck editor, spaced repetition engine, mastery proofs, deck marketplace

You choose: chain
You choose: name and logo
You choose: accent color

Customfrom $1,200

Built around you

Reshape it entirely: new features, your flows, your brand end to end, integrations you need. We scope it with you.

Everything in Base
Custom features and design
Priority build

Why it is new

What exists today, and what this does differently

What is new

No live product found that records spaced repetition streaks or mastery onchain.

Closest things out there

Kernel V2 once paired spaced repetition with an Ethereum token model but never shipped tracking; Anki and Repeti are offchain.

Checked with web searches in October 2026. A search is not proof that nothing similar exists, and the market moves fast, so we recheck before every build.

What it unlocks

The human in it

Makes your study habit compound into value.

The Regatta Board

Races it can enter

grant · Solana Foundation · rolling

Solana Foundation Grants

rolling

Official page ↗

Existing projects OK

Their rule on existing code: Existing projects OK

What you own

The whole app, not a starter kit.

The complete Memory Palace app: learners turn their notes and mistakes into spaced repetition decks, prove their streak and delayed-recall mastery onchain, and sell the decks they polish, with a paywall and deck market built in.

Base price · $159

The user app, complete

Every buyer gets the same finished app. Basic branding and copy changes come through a quick form.

Three step onboardingHome

Shown once: notes become cards, mastered cards light rooms, proof by morning.

Palace home with next actionHome

Illustrated palace that lights rooms as cards are mastered, progress steps and one clear next step.

Streak flag with grace nightsHome

A missed night uses a grace night, logged honestly as grace, or restarts the streak while mastery is kept.

Sunday palace tourHome

Three mastered cards asked cold each week; passing lights a new room. Gated behind Scholar.

Nightly spaced repetition reviewStudy

Flip, grade Again, Hard, Good or Easy, with scheduled intervals and a delayed-recall mastery rule.

Cram guardStudy

Marking everything Easy moves mastery by zero, and bursts are flagged by a timing check.

Seal the night onchainStudy

A hash of the review log and counts on Base or Solana, never answers, plus a share card.

Deck libraryDecks

Decks you write and decks you bought, one tap into tonight's review. Free plan writes one deck.

Card agent from your mistakesDecks

Paste a mistake and get one-fact cards in your own words. Gated behind Scholar.

Deck market with USDC checkoutDecks

Buy decks from other authors through the shared crypto checkout; buyers start their own streak.

Publish and sell your deckDecks

Set a price, confirm rights, content hash and an onchain author split.

Weekly attestations and receiptsProof

Streak, mastered count, grace nights and log root per week, with what is and is not onchain.

Public page with live quizProof

A recruiter view with a live quiz on random mastered cards. Gated behind Scholar.

Profile, plans, deck income and settingsMe

Plan sheet with Scholar upgrade, nudge time, cards per night, streak visibility, permissions and vision.

Open the full app demo

Add-on

Owner console

Your admin side: revenue, paywall editor, users, rules and the agent log.

Revenue and paywall editorRevenue

Live revenue, tier names and prices, author share, gated features, payouts, USDC payments and payment methods.

RulesRules

Mastery gap, grace nights, quiz size, proof network, deck approval, refund window, timing check, gas sponsorship.

Deck queue and refundsQueue

Approve or decline decks with copyright flags, and settle refunds inside the window.

Card agent logAgent

What the agent did, what failed and how it adapted, plus running costs.

Roadmap requestsRoadmap

v2 and v3 builds with scope and add-on prices, requested in one tap.

Top-up

Growth and referrals

Referral and growth mechanics, switched on when you are ready to grow.

Growth loops and referralsGrowth

Study circle nights, cohorts, public page to deck loop and learner referral codes.

The money path, built in

How it earns for you

Scholar subscriptions in USDC plus an app share of every deck sale, split onchain between author and owner. Reviewing and proving stays free.

Free$0One deck you write, nightly reviews, private streak, weekly proof

Scholar$4 per monthUnlimited decks, card agent from your mistakes, public page with live quiz, Sunday palace tour

Author10% of deck salesSell decks in USDC with no monthly fee

The owner sets the app share of deck sales (5 to 20 percent) and whether weekly proof gas is sponsored.

Prices are yours to set. Illustrative, not a promise of income.

Growth loops, built in

How it spreads

Public proof pages link to the deck behind them, so recruiters and friends land on a deck
Buyers who master a niche become authors and bring their own learners
Share card after a sealed week
Study circle nights where a shared wing lights only when everyone reviews
Learner referral codes worth a free month of Scholar for both

Roadmap · build the next phase with us

Where it goes next

v1 included

The full learner app

Spaced repetition with a delayed recall mastery rule
Grace nights, one nudge, Sunday palace tour
Weekly attestations on Base or Solana
Deck market with USDC split and refunds
Paywall, owner console, card agent

Included

Study groups and shared wings

Group wings that only light when every member keeps the streak
Telegram bot for the nightly nudge and grading
Group plans billed to one wallet
Author analytics: retention per card

Add-on from $400

Verify portal for employers

Recruiter accounts that run live quizzes at scale
Bootcamp issued decks with cohort records
Per verification billing
Open mastery schema and reference verifier

Add-on from $900

For investors and grant reviewers

The pitch, ready

Spaced repetition that proves your streak and mastery onchain, and pays you for the decks you polish.

Problem: Self-taught learners put in hundreds of quiet hours nobody can see or trust, and the good decks they build die on their laptops.

Solution: A palace of flashcards with a delayed-recall mastery rule, weekly onchain proofs of the review log, a live quiz for verifiers, and a deck market with an onchain author split.

Why now: Cheap small models can write cards from a learner's own mistakes, and attestations on Base cost under a cent, so a tamper-evident learning record is finally practical.

Market: Self-taught developers, language exam takers and medical students, a niche where learners already pay for decks and courses.

The ask: Pilot with one study community and two deck authors to prove retention and first deck sales.

Funding is never guaranteed. Check each program's rules.

For hackathons and demo days

Your 2 minute demo

Home: meet Jun, a night pharmacy tech in Seoul, and his palace of flashcards
Study: review tonight's cards, grade honestly, then try to cram and watch mastery stay put
Owner Agent: see the card agent fail with docs-copied cards, then switch to cards from Jun's mistakes
Proof: weekly attestations, and the recruiter's live quiz on the public page
Decks: buy a deck through USDC checkout and publish Jun's own deck
Owner Revenue: edit the Scholar price and author share, see it change the Plans sheet
Owner Rules and Queue: change the mastery gap and grace nights, approve Jun's deck
Owner Roadmap: request study circles or the employer verify portal

Many hackathons require code written at the event. See the Regatta Boardfor each race's rule.

Make it entirely yours

Custom work covers new subjects and card formats, your own branding and copy, other chains, school or bootcamp integrations and features beyond the roadmap, scoped on a call from $1,200.

Custom from $1,200

BLUEPRINT

Why it matters and how it really works

The need

Self-taught learners put in hundreds of quiet hours that nobody can see or trust, and the good study decks they build die on their laptops.

What exists and what is new

Anki and Repeti already do spaced repetition well, offchain. Kernel V2 once paired spaced repetition with an Ethereum token model but never shipped tracking. We found no live product that records spaced repetition streaks or mastery onchain. What is new here is narrow: a tamper-evident review log with a delayed-recall mastery rule, plus a deck marketplace where the author earns and buyers start their own streak.

The data it runs on

The learner's own notes and mistakes, the cards, a local review log (card id, grade, timestamp, interval), weekly Merkle roots of that log, and deck purchase records. Answers and notes stay offchain.

1.The mission

Make the quiet work of learning visible, honest and worth something to the person who did it.

2.Why people can't resist it

The palace grows Each mastered topic lights a room. People return for the room they almost finished.

Proof that cramming cannot fake Mastery only counts after a correct recall 21 days later, so the record means something to a recruiter.

Your deck earns A polished deck can be sold, and buyers still have to earn their own mastery.

3.How it works for real

Wallet: Privy embedded wallet on Base or Solana, created at sign up with email. No seed phrase for the learner.

Review engine: FSRS or SM-2 scheduler running on device. The review log is stored locally and synced encrypted to the app server.

Card agent: A small model tier (for example Claude Haiku 4.5 or an equivalent OpenRouter model) turns highlighted mistakes into one-fact cloze cards. A larger model is used only for weekly deck cleanup.

Mastery attestations: Once a week the app posts an EAS attestation on Base (or a compressed record on Solana) with streak, mastered count, grace nights and the Merkle root of the log.

Deck marketplace: Decks are versioned files with a content hash. Purchases in USDC go through a split contract: 90% author, 10% app.

Public page and quiz: A share page reads the attestations through an indexer and offers a live 5 card quiz so viewers can check the knowledge, not just the log.

Notifications: One nudge per night at the learner's chosen time via push or Telegram. Never a second nudge.

4.Cost per use and pricing

Card generation with a small model is about 1,500 input and 400 output tokens per 10 cards, roughly $0.003 at Haiku class pricing ($1 per million input, $5 per million output). A weekly attestation on Base costs well under $0.01 in gas at typical fees. For 1,000 active learners: about $40 a month in model calls, under $40 in gas, plus hosting around $25. Roughly $100 a month total.

Free $0

One deck, nightly reviews, private streak, weekly proof.

Scholar $4 per month

Unlimited decks, card agent from your mistakes, public page with live quiz, Sunday palace tour.

Author 10% of deck sales

Sell decks in USDC. No monthly fee, the app takes a share only when a deck sells.

5.Growth loop

Every public page and share card links to the deck behind it. Buyers start their own palace, become authors in their subject, and their pages bring the next learners. Study groups get a shared wing that only lights when every member keeps their streak.

6.Risks and guardrails

Fake mastery: Someone could still look up answers. Mitigation: the delayed-recall rule, timing checks, and the live quiz on the public page. The page says plainly that the log proves consistency, the quiz proves knowledge.

Copyright in decks: Decks built from textbooks or course material may infringe. Authors confirm rights, takedown process, and the card agent works from the learner's own notes.

Privacy: Only hashes and counts go onchain. A learner can keep the streak private. Nothing about wrong answers is ever public.

Burnout and guilt: Streak apps can punish people. Grace nights are built in and shown honestly, and the nudge never repeats.

Low-quality decks: Marketplace ranking uses learner retention on the deck, not sales, and refunds within 48 hours.

7.Build order

Card editor and FSRS scheduler on device
Card agent that writes cloze cards from pasted notes and mistakes
Embedded wallet and weekly EAS attestation on Base
Public page with streak, mastered count and live quiz
Deck publishing with content hash and USDC purchase split
Nightly nudge and Sunday palace tour

8.Where this is going

Now
One learner, one deck, a streak and mastery record that survives cramming.
Next
Study groups with shared wings, and authors earning from decks in niche subjects.
Later
Employers and bootcamps accept palace records next to portfolios, with live quizzes instead of certificates.
The big one
Anyone, anywhere, can prove what they taught themselves, without paying for a degree to be believed.

Costs and tools are estimates at the time of writing. General information only, not legal or financial advice.

OWNER PLAYBOOK

Own it, then chart your voyage

Nine routes from one vessel. Tap a port to open its chart.

Why own Memory Palace

Anki keeps your streak on one device and your best decks earn you nothing. Memory Palace runs on your own deployment, logs your mastery and streaks onchain under your wallet, and lets you sell polished decks with payment going straight to you. You own the study platform, the learners and the proof that you actually know your stuff.

What’s stopping you?

“I can't code.”

The deck editor, spaced repetition engine and marketplace come ready. The guide covers deploy, wallet connect and adding your first deck.

“Will anyone buy my decks?”

Only if they solve a specific exam or skill gap. Build one deck for a test people pay to pass, and see if ten people buy it before making more.

“Does onchain mastery mean anything?”

It proves you reviewed and passed cards on a schedule over time. It does not prove deep understanding, so pair it with real work. Be honest about that with learners.

“Is it really mine?”

Yes. Deployed from your wallet, code in your git, payments to your address.

“What about copyright on deck content?”

Only sell decks you wrote or have rights to. Do not copy textbook text. This is not legal advice.

The million-dollar ladder

Learners pay for premium decks (you take a marketplace cut on others' decks) and for a Pro plan with mastery certificates and cohort streaks. Schools and bootcamps pay for group plans.

$50 per month

$3,200 per month

$32,000 per month

$85,000 per month (about $1M a year)

First 10 learners

10 learners

$5 per month

Proof

400 learners

$8 per month

Niche leader

4,000 learners

$8 per month

Business

10,000 learners

$8.50 per month blended with group plans

Own one exam niche first, like Solidity interviews or a nursing licence.
Recruit deck authors with a revenue share; their audiences become yours.
Sell group plans to bootcamps.
This is a target, not a promise. Retention matters more than signups; track day 30 streaks.

Illustrative stages, not a forecast. Results depend on you and the market; nothing here is guaranteed.