Observed arrival · 2026-11-05
Tsundokuka: a tower for unread books
A Japanese reading-log app for iOS and Android that tracks books you want, own, and have finished.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Readers who track owned, unread, and wanted books
- Worth noticing
- Tower height is estimated from page count using 0.12 mm per sheet, with a ruler that extends from 30 cm to Tokyo Skytree.
Field notes
The guide lays out a flexible book workflow: items can move among wanted, unread, and finished states without requiring a fixed order, and readers can import existing records from two named services. It also describes a PRO reading timer that logs time and pages together, plus an optional shared space where other active readers appear as stars; the guide says usernames and selected book details may be visible there.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue