Memory Marker: Flashcards

Draw a highlighter across your own textbook, then cover it with the red sheet and test yourself. The paper method, on PDFs and photographs.

■ On the page itself

• Import a PDF, photograph the pages, or pick them from your library — they become one document

• Draw the marker over the page — never flattened into an image, so the text stays sharp at any zoom

• A rough stroke settles onto the words underneath — read from the PDF's text layer, or from a photograph by on-device recognition, never uploaded. "As drawn" keeps it where your hand put it

• There is an underline too, for what you want marked but not hidden

• Erase, reorder pages, add a page you missed later

• Shelve each book as planned, in progress or done; the cover carries its mark count

■ The red sheet

• Pull the sheet down and every marked run turns solid red — opaque, not a veil to read through

• Step from one blank to the next, reveal the answer, say whether you had it

• What you knew stops hiding, so the second pass is only what is still unknown

• Choose how far a lap reaches — this page, this page onward, or the whole document

• Turn on "Missed only" and the lap loops just what you got wrong; the header counts learned, missed and untested

■ The cards

• Meaning, reading, part of speech, forms, synonyms, etymology, examples and your own note

• Five Leitner boxes — a hit books the next review 1, 7, 14 then 30 days out, and the fifth graduates the card; a miss sends it back to the start

• Any card can read itself aloud

• Flip the direction, shuffle, or show only what is due

• English headwords get Japanese meaning suggestions from the dictionary inside the app (offline)

■ It answers "did I study today" first

• Streak, what you answered today and how much you got right, what is due, how many books

• Mastery rate, and the last two weeks

• Every number is a way back into the work

■ Memos

• Written on a book or a deck, gathered on one board

• Plain notes or checklists, five paper colours, long-press to reorder

■ Easy on the eyes, hour after hour

• Four colour themes — deep navy, warm sand, dusty rose, sage

• Light, dark, or follow the system

• Six ways to read a page — off, sepia, dim, greyscale, night (inverted), auto — with a tint slider

• Two ways to turn a page — scroll continuously, or swipe one page at a time

• One book can read differently from the rest

• 한국어 · English · 日本語 · 简体中文 · 繁體中文

■ Sync between your devices — part of Unlock Everything

• Pick a storage location — iCloud or Google Drive — and your books, marks, decks, cards and memos carry across

• The default is "This device only" — choose nothing and nothing leaves

• The original PDFs and photographs go up too, from the start — they use your own cloud storage, and one switch stops them

• No server of ours: it lives in your own cloud account, where we cannot open it

• The study log — streak and charts — stays with each device

■ Travelling light

• No account with us — only your own iCloud or Google account, and only for sync

• No ads

• With sync off, your books, marks and cards are on this device only

• The dictionary ships inside the app and works with no connection

■ What it costs

Bring in as many books as you like, free. The marker holds a hundred marks at a time, and erasing one hands its slot back. Unlock Everything — a single purchase, not a subscription — lifts that limit and opens sync to your own cloud. Books, cards, decks, speech and the dictionary are unlimited from the start.

Dictionary data is derived from JMdict/EDICT (© Electronic Dictionary Research and Development Group) and used under the EDRDG licence. The full text is in Settings → Sources & Licences.

■ What people use it for

• Vocabulary for language exams and coursework

• Terminology in scanned lecture PDFs

• Revising a problem set shot from a paper workbook

• One library on phone and tablet, backed up to your own cloud