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Build a deck from any combination of topics and subtopics. Flip with a keystroke. Mark known versus review. Drill until it sticks.
Pick a topic. Narrow to specific subtopics. Stack a second topic in. The picker shows you the live card count for every combination — you walk into the sitting knowing exactly how big the deck is.
Every card carries a precise front prompt, a calibrated back answer, and an optional hint when you genuinely need a nudge.

The deck builder rests on three structural choices. Each one is a single toggle, surfaced before you commit — so a sitting is always exactly the shape you wanted.
Stack any combination of topics into a single deck — drill one subtopic in isolation, or mix several together for a broad review sitting.
Every card carries a precise prompt on the front, a calibrated answer on the back, and an optional hint when you genuinely need a nudge.
A single toggle decides whether the deck is randomised or runs in its natural taxonomy order — useful when you’re drilling a specific sequence.

Active recall lives or dies by friction. The study screen is stripped down to a card, a progress strip, and two decisions — everything else is a keystroke away.
Space to flip. Arrows to navigate. 1 to mark for review, 2 to mark known — your hands stay where they are.
Mark each card as you go. Knowns drop out of the next pass; reviews collect into a focused restart deck.
When you finish a deck, restart with just the cards you flagged for review. Cull the easy ones, sharpen the hard ones.
One click rewinds the deck and (optionally) reshuffles — no setup screen, no friction, back into recall.
Need to study away from a screen? Export the deck to a print-ready PDF straight from the study session.
A thin progress strip across the top tells you exactly how deep into the deck you are — without breaking flow.
Active recall isn’t about a single pass. When you reach the end of a deck, the done screen tallies known versus review and lets you immediately restart with just the cards that didn’t stick — or export the whole deck to PDF and study away from a screen.
A single button rebuilds the deck from just the cards you flagged.
Full restart gets a fresh order so order memory doesn’t do the work.
Export the deck to a clean PDF for offline study or photocopies.
The done screen shows the split — instantly diagnostic.

Pick a topic to drop straight into the deck builder with it pre-selected — then narrow to subtopics, stack a second topic in, or just start.
Choose one or stack several. Narrow to subtopics for surgical precision.
Toggle shuffle, then start the sitting with the live card count you saw in the picker.
Read the prompt. Recall the answer. Flip. Mark known or review with one key.
Cull the easy ones at the end. Restart on just the cards that didn’t stick.
Open the deck builder and turn a topic you keep getting wrong into one you can recite without thinking.