ISBN vs BookTower Barcode Library
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ISBN
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ISBN資料庫收錄了台灣完整書籍資料，透過搜尋名稱或掃描ISBN書碼查找書籍，對比線上書店價格。
BookTower Barcode Library
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Add books instantly with a barcode scan Keep read reading and want to read lists together Build a personal library and track your reading journey
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Verdict
The clearest difference is update cadence: BookTower Barcode Library at every 5 days against ISBN's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ISBN ships an update every 4 months, BookTower Barcode Library every 5 days. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.
| Parameter | ISBN | BookTower Barcode Library |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 5 days — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 16 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | 剑秋 肖 | minchul kim |
In-app purchases
ISBN
No in-app purchases
BookTower Barcode Library
No in-app purchases
Questions
Is ISBN free?
Is BookTower Barcode Library free?
Do ISBN or BookTower Barcode Library have ads?
Which is updated more often, ISBN or BookTower Barcode Library?
Other comparisons
