Red Sheet: Turn your notes into a quiz, no typing

Red Sheet, an iPhone and iPad app on the App Store, does this with photos of your own notes, textbooks and worksheets. It hides what you wrote in red, orange or pink pen and the words under a green highlighter, and you tap each answer to reveal it. Nothing needs typing: the page itself becomes the quiz.

Step by step: How to Turn Your Notes into a Quiz on iPhone Without Typing

With Red Sheet you don’t make cards at all: take a photo of the page, and every answer written in red, orange or pink pen, or under a green highlighter, is hidden where it is. Tap one to reveal it and mark it ○ or ×, as you would turn over a card. Red Sheet is on the App Store for iPhone and iPad.

Step by step: How to Turn Your Notes into a Quiz on iPhone Without Typing

A red sheet is a sheet of clear red plastic that students in Japan lay over their notes. Through it, red and orange writing looks the same color as the paper and disappears, while black text stays dark, so you write the answers in red and test yourself. Red Sheet, an app for iPhone and iPad, puts red, green and blue sheets over photos of your pages.

Step by step: How to Use a Digital Red Sheet on iPhone and iPad

In Red Sheet, open the page in Edit and draw a box around the words, or draw over them with the marker: they stay hidden until you tap them, so any printed page becomes a fill-in-the-blank test. Red Sheet is on the App Store for iPhone and iPad.

Step by step: How to Hide Words on a Textbook Page and Make a Fill-in-the-Blank Test

Yes. Red Sheet imports a PDF from the Files app and adds each of its pages to a notebook, so notes from another note-taking app work too once you export them as a PDF. You can also add pages with the document scanner or from your photos.

Step by step: How to Study from a PDF on iPhone and iPad, in Sync

Red Sheet brings back the answers on your own pages when it’s time to review them, and every feature is free. Mark each answer ○ or ×: one you missed comes back the next day, and the ones you know come back after longer gaps, in the Review tab.

Step by step: How to Use Spaced Repetition on Your Own Notes on iPhone and iPad

Take a photo of the page with Red Sheet, an iPhone and iPad app on the App Store. It hides the answers you wrote in red, orange or pink pen, or under a green highlighter, so each one becomes a question. Tap to reveal one at a time and mark it ○ or ×, and the ones you missed come back the next day.

Step by step: How to Turn Your Notes into a Quiz on iPhone Without Typing

Red Sheet turns the pages you already study from into active recall: the answers are hidden, you try to remember each one, and a tap shows whether you were right. Mark it ○ or ×, and Red Sheet brings the ones you missed back for review the next day. It works on photos, scans and PDFs of your own notes, textbooks and worksheets.

Step by step: How to Use Spaced Repetition on Your Own Notes on iPhone and iPad

In Red Sheet, add the page, open Edit and draw a box around each word you want to learn, or draw over it with the marker. Those words stay hidden until you tap them, so the page works as a fill-in-the-blank test. The eraser shows anything you hid by mistake.

Step by step: How to Hide Words on a Textbook Page and Make a Fill-in-the-Blank Test

Quiz yourself on them: Red Sheet hides the answers on photos of your own notes and worksheets, and you reveal each one after trying to recall it. The ones you mark × come back the next day, and the ones you know come back after longer gaps. Use it for vocabulary, terms, dates and formulas, on iPhone and iPad.

Step by step: How to Use Spaced Repetition on Your Own Notes on iPhone and iPad

Yes: Red Sheet for iPhone and iPad lays a red, green or blue sheet over photos of your own pages, so what you wrote in red, orange or pink pen disappears like it does under the real plastic sheet. Slide a band to check one question at a time. You don’t need to carry the real sheet.

Step by step: How to Use a Digital Red Sheet on iPhone and iPad

Under Red Sheet’s red sheet, red, orange and pink pen disappears, and words under a green highlighter turn dark and are hidden. Under the green sheet, words under a pink highlighter are hidden, and under the blue sheet, blue check pen disappears. You can switch sheets to match the pens and markers you used.

Step by step: Red, Green and Blue Sheet: Which Pens and Highlighters Does Red Sheet Hide?

Yes. In Red Sheet, mark each answer ○ or × as you study. The Review tab has today’s review and a round of only the answers you missed, and a × comes back the next day while a ○ comes back after a longer gap.

Step by step: How to Use Spaced Repetition on Your Own Notes on iPhone and iPad

Yes. Red Sheet has a vertical band for vertical text, and a horizontal band for horizontal text, which you slide to check one question at a time. On iPad you can draw boxes and markers with Apple Pencil, and your pages, edits and grades sync with your iPhone through your own iCloud.

Step by step: How to Use a Digital Red Sheet on iPhone and iPad

Yes. Photograph or scan a vocabulary list, a workbook page or your own notes, write or highlight the answers in red, orange, pink or green, and Red Sheet hides them. You tap to check each one and mark it ○ or ×. It works offline and needs no account.

Every feature of Red Sheet is free, with no in-app purchases, no ads and no page limit, and there is no account to make. A sample notebook is ready when you open it, so you can try it without the camera. Red Sheet is on the App Store for iPhone and iPad.

Red Sheet hides the answers on your iPhone or iPad without the internet, and W Lab never sees your pages: there is no server of ours to send them to. Your pages leave the device only through your own iCloud, when you turn on iCloud Sync, and in backups you export yourself.

Red Sheet runs on iPhone with iOS 17 or later and on iPad with iPadOS 17 or later, in English and Japanese. With iCloud Sync on, your pages, edits and grades stay the same on both, and on iPad you can draw boxes and markers with Apple Pencil.

Step by step: How to Study from a PDF on iPhone and iPad, in Sync