Comparison

Ritsu vs 積DROP

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ritsu

Organize your reading with a visually appealing digital bookshelf. Track books you've read, are currently reading, or want to read, and save notes and impressions for each title. Enjoy a beautiful way to manage your reading history and TBR list.

Highlights
  • Visual bookshelf UI
  • Track read, reading, and TBR books
  • Save notes and quotes
  • Manage reading status
  • Organize various book types
  • Beautiful reading history view
Features
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Ritsu is a beautiful book tracker and reading log app that lets you collect the books you have read, are currently reading, and want to read on your own personal bookshelf. With a visual bookshelf UI inspired by real book covers and spines, Ritsu makes it more enjoyable to keep track of your reading. Every book you add becomes part of a growing collection, helping you turn everyday reading into something you can see, organize, and look back on. Whether you read novels, manga, business books, ebooks, or nonfiction, Ritsu helps you manage your reading history, notes, thoughts, and to-be-read list in one simple place. Every book you read adds something new to your shelf. Ritsu combines the joy of collecting books with the convenience of a reading tracker. What you can do with Ritsu: • Track books you have read, are reading, and want to read • Manage reading status for each book • Save thoughts, notes, memorable quotes, and impressions • View your reading history in a beautiful bookshelf-style interface • Organize novels, manga, business books, practical books, ebooks, and more • Keep your TBR list and completed books easy to see Recommended for people who want to: • Keep a clean and beautiful record of books they have read • Build a personal bookshelf on their phone • Save reading notes and impressions for each book • Manage books they want to read or have not finished yet • Enjoy reading as if they were collecting books on a real shelf With Ritsu, your reading record becomes more than just a log. It becomes a bookshelf that grows with every book you read. Make your daily reading more enjoyable, more organized, and more beautiful. Some features, such as unlimited bookshelves and detailed statistics, are available with the Premium Plan through in-app purchase. Terms of Use:https://scented-cross-231.notion.site/Terms-of-Use-35971e35e68d80f2a90cd3cc19d43b2f Privacy Policy:https://scented-cross-231.notion.site/Privacy-Policy-35971e35e68d80debcccc8d658ec9be5

About

積DROP

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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)

Screenshots

Ritsu3 screens
積DROP4 screens

Verdict

The call

Ritsu and 積DROP are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ritsu sells 3 in-app purchases, starting at $3.99 per month and 積DROP sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Ritsu ships an update fortnightly, 積DROP every 9 days. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

ScorecardNo meaningful differences
Ritsu versus 積DROP: the parameters behind the verdict, then further details
ParameterRitsu積DROP
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyFortnightlyEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.1 — better15.5
Further details — not scored
Size57 MB57 MB
Age rating4+4+
DeveloperKYOSUKE WATANABEForeGroove Inc.

In-app purchases

3 purchases

Ritsu

Subscriptions2
  • Ritsu Pro Monthly$3.991 Month
  • Ritsu Pro Yearly7 Days trial$19.991 Year
One-time1
  • Ritsu Pro Lifetime$34.99
4 purchases

積DROP

One-time4
  • A Small Coffee$0.49
  • A Light Meal$2.99
  • A Lunch$5.99
Show 1 more
  • A Dinner Treat$11.99

Questions

Is Ritsu free?
Ritsu is free to download, with in-app purchases available.
Is 積DROP free?
積DROP is free to download, with in-app purchases available.
Do Ritsu or 積DROP have ads?
Neither Ritsu nor 積DROP shows ads.
Which is updated more often, Ritsu or 積DROP?
Ritsu ships an update fortnightly, and 積DROP every 9 days. Most recently, Ritsu was updated on September 8, 2026 and 積DROP on September 10, 2026.

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