積DROP vs Booknest

Got a stack of books you bought but haven't read? Same. TsunDrop is a reading app that stacks every book you buy into a physical tower — powered by a real 2D physics engine. You don't have to read them. Just stack. That's the whole point. — Just stack. That's it. — Every time you add a book, it falls from the top and lands on your tower, sized by its format (bunko, shinsho, hardback, A5). The physics engine makes every stack a little different. Same book, different lean. Reading apps love to make you feel guilty. TsunDrop doesn't. Buying books — even ones you'll never get to — is a perfectly valid hobby. We're here to celebrate it. — Who it's for — - People who buy books faster than they can read them - Anyone who hears "your tsundoku is too big" and thinks "let it grow" - Readers who want to see their pile, not just a number on a screen - Folks burned out by every other reading tracker — Inside — ▸ Stack (the main thing) Scan a barcode or type a 13-digit ISBN. TsunDrop pulls bibliographic data from openBD and Japan's NDL Search. Manual entry works too. Books fall in, get stacked, lean against each other. Add more and the pile grows taller, genre colors mixing into a mosaic. Whether that's "too many" or "looking great" is entirely your call — set the overflow warning to "none" and stack as much as you want. ▸ Height Rank The total spine width of every book — read or unread — is measured against a real-world scale. An apple → a milk carton → a ruler → a cat → a guitar → an adult → a phone booth → a giraffe → a house → a big tree → Tokyo Tower → Mt. Fuji → Everest. Buy and stack: rank goes up. Read: rank goes up. Both count, equally. ▸ Read one when you feel like it Tap a book, hit "Finish & shelve." It moves to your Finished Shelf, sortable by date, title, or color. The books resting on top tumble down in physics. That moment is satisfying — but it's a side dish, not the main course. ▸ Numbers Tower view: unread count / pages left / pages read Shelf view: total pages read / books finished / shelf width (cm) Pages stack up like XP. Set a monthly goal if you want. Skip it if you don't. ▸ Share Export your tower as a 1080×1080 image and post it. "Yeah, I haven't read most of these." — Details — - Genre colors (literature, history, philosophy, tech, business, other) - 3 text sizes, 4 themes (Green, Ink, Navy, Grape) - Haptic feedback - Notes on every book (up to 2000 characters) - Export and import for backup — Privacy — All your book data stays on your device. No account required. TsunDrop only contacts openBD and NDL Search for bibliographic lookups. Nothing else leaves your phone. The camera is used solely to scan ISBN barcodes. — You might be here because — Your shelf is overflowing. You buy too many e-books and forgot what you have. You want a break from "you really should read more." If so: just stack. Read when you feel like it. Stack first. Read later (if ever). Bibliographic data: openBD / NDL Search Licenses: Matter.js (MIT) / Noto Serif JP, Noto Sans JP (SIL OFL 1.1)

A quiet home for the books you own. Scan the back cover — no typing. Every feature is free. No account, no ads. Three ways to fill your nest Pull any book off your shelf and point the camera at the barcode on the back. Or search by title or author. Or type it in yourself, for the old paperback that never had a barcode — and pick a cover from your own photos while you're there. Looking a book up does ask the internet: Booknest queries public book services (Kakao, Open Library, Google Books) for the title, author, and cover, and tells you which one answered. You see what came back before you decide to shelve it. Working through a stack? Keep scanning. Booknest collects the books as you go, flags anything already in your library, and shelves the batch once you've looked it over. Your shelf, the way it stands at home Books sit spine out on a shelf you can flick through; tap one to open it. Switch to a grid of covers or a plain list whenever you'd rather see everything at once. Search and sort — by title, author, date added, publication date, rating, or date finished — or narrow the shelf by category, publisher, rating, language, or where the book is kept. A record of your reading Mark a book to read, reading, or finished. Save the page you're on and watch the progress fill. Add a rating, the day you started and the day you closed it, and notes for whatever stayed with you. None of it is required — log as much or as little as you like. Watch the year take shape How many books you own, how many you added this month, how many you finished this year. A chart of your finishes month by month, the categories you lean toward, your average rating. Yours to take with you Export the whole library to CSV or XLSX. Or make a ZIP backup — your records and every cover image — and keep it wherever you keep your own files, ready to restore onto your next iPhone. Free, and staying that way The statistics, the exports, the backups: all of it is free, and no feature is locked. There is a tip jar if you'd like to leave something for the developer. Tipping is purely a kindness — it unlocks nothing. Your nest stays off the grid There's no sign-in, because there's nothing to sign in to. No account, no server of ours, no ads, no analytics, nothing collected about you. Your library, your notes, and your covers live on your iPhone, and everything already on your shelf is there whether or not you have a signal. Made to be read Booknest speaks English, Korean, Japanese, Simplified Chinese, French, German, and Spanish. It follows Dynamic Type and works with VoiceOver — at accessibility text sizes the cover grid drops to two columns and offers you a list instead. iPhone only. Shall we shelve your first book?