Observed arrival · 2026-10-12
TangoDuo: vocabulary cards that open like a book
An English vocabulary app in development that teaches words through illustrated multiple-choice drills, with layouts for a standard iPhone and the site’s “iPhone Duo” format.
- For
- English learners who prefer visual vocabulary practice
- Worth noticing
- The page describes 35 books covering 3,810 words, with five-word sessions and missed-word reviews; the app is still in development.
Field notes
The described drills use four question formats, progressively removing clues, and mix in likely confusions such as “borrow” and “lend.” Missed words collect in a personal review deck, while the page also describes daily five-word sessions and a streak widget. The site lists free sample chapters alongside a ¥500 monthly plan; it says learning records remain on-device, while requested AI cards involve sending the word and subscription-verification information.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue