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RectoVerso
Flashcards that unfold.
You open the phone, and the answer comes out a little at a time. Stop when you know it. How far you peeked is the rating, so you never decide if a card was Hard or Good. On other iPhones, slide the answer up. Brings your Anki decks along. Pay once, no account.
Top comment
Hi, I'm Simon. I'm a designer and developer, and I teach at an engineering school in Switzerland. In college I used flashcards to study vocabulary, and I always found the granular self-grading arbitrary and irritating, even if it fed the spaced repetition algorithm nicely. So RectoVerso asks you nothing. You open the iPhone Duo on a question, or slide the answer up on any other iPhone, and the answer arrives a little at a time: letter by letter, term by term, line by line. You stop as soon as you know it. The whole answer then shows so you can check yourself, and how much you'd revealed is what FSRS-6 schedules the card from. There is no Again, Hard, Good or Easy. That's the whole trick. The rest is what you'd expect from a serious flashcard app: your Anki decks as they are, with their math, code, furigana, tone colors and image occlusion, and export back. Cards drafted on the phone from a text by Apple Intelligence, on the device. VoiceOver reads every card. No account, no tracking, no server: backups go to your own iCloud Drive. The reveal rests on research about accumulating cues (Finley and colleagues, 2011), and choosing a rating from it is our own idea, not yet tested in a study. The research page says what's proven and what isn't: rectoverso.code-think.com/research Out today, the day iPhone Duo ships. US$12.99 until November 2, then US$17.99, paid once. I'm around all day for questions.
About RectoVerso on Product Hunt
“Flashcards that unfold. ”
RectoVerso was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #146 on the daily leaderboard. You open the phone, and the answer comes out a little at a time. Stop when you know it. How far you peeked is the rating, so you never decide if a card was Hard or Good. On other iPhones, slide the answer up. Brings your Anki decks along. Pay once, no account.
On the analytics side, RectoVerso competes within iOS, Education and Apple — topics that collectively have 206.3k followers on Product Hunt. The dashboard above tracks how RectoVerso performed against the three products that launched closest to it on the same day.
Who hunted RectoVerso?
RectoVerso was hunted by Simon Pinkas. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of RectoVerso including community comment highlights and product details, visit the product overview.

