← RectoVerso

In one paragraph

RectoVerso is a flashcard app built around iPhone Duo’s hinge. The answer is on the other page: open the phone, and it arrives letter by letter as the hinge opens. Stop when you know it, and say Right or Wrong. Instead of asking you to grade yourself, RectoVerso records how much of the answer you needed, and schedules the card from that with FSRS-6, the modern spaced-repetition algorithm. On any other iPhone you pull the answer up with your thumb. Cards can be written, made from a text with Apple Intelligence on the iPhone, or imported from Anki. No account, no tracking, nothing collected.

The facts

App
RectoVerso
Developer
Simon Pinkas
Platform
iPhone, iOS 27.1 or later. Designed for iPhone Duo.
Price
$14.99, once (CHF 15 · €14.99). No subscription, no in-app purchase.
Availability
Coming to the App Store this autumn
Language
English
Privacy
Data Not Collected. No account; it works offline.
Accessibility
VoiceOver, Voice Control, Larger Text, Dark Interface, Differentiate Without Color Alone, Sufficient Contrast, Reduced Motion
Contact
rectoverso@code-think.com

What’s new about it

Screens

The app as it runs, in light and dark. Free to use in articles about RectoVerso.

  • The shelf and a deck, facing pages The shelf and a deck, facing pages The shelf and a deck, facing pages PNG · Light · Dark
  • Stats: retention over three months Stats: retention over three months Stats: retention over three months PNG · Light · Dark
  • Cards drafted from a text, on the iPhone Cards drafted from a text, on the iPhone Cards drafted from a text, on the iPhone PNG · Light · Dark
  • A picture answer, uncovered as the hinge opens A picture answer, uncovered as the hinge opens A picture answer, uncovered as the hinge opens PNG · Light · Dark
  • A definition, sharpening as the hinge opens A definition, sharpening as the hinge opens A definition, sharpening as the hinge opens PNG · Light · Dark
  • Tabletop: the question above the fold Tabletop: the question above the fold Tabletop: the question above the fold PNG · Light · Dark
  • An Anki deck, imported with its history An Anki deck, imported with its history An Anki deck, imported with its history PNG · Light · Dark
  • A picture on the recto, the answer arriving A picture on the recto, the answer arriving A picture on the recto, the answer arriving PNG · Light · Dark
  • A leaning card: split it or rewrite it A leaning card: split it or rewrite it A leaning card: split it or rewrite it PNG · Light · Dark
  • Writing a card, recto and verso Writing a card, recto and verso Writing a card, recto and verso PNG · Light · Dark
  • Effort: how much of the answer each deck needs Effort: how much of the answer each deck needs Effort: how much of the answer each deck needs PNG · Light · Dark
  • Widgets: what’s due, and the cards to work on Widgets: what’s due, and the cards to work on Widgets: what’s due, and the cards to work on PNG · Light · Dark

Devices and icon

The review on each device, the icon and the share image. The screens are the app’s own, as it runs; the devices are Apple’s product images.