# Knowuro reader vs Shelf Scan

Knowuro reader and Shelf Scan 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.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Knowuro reader ships an update every 4 weeks, Shelf Scan monthly. The most recent releases landed on October 23, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Knowuro reader | Shelf Scan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.5 (2 ratings)](https://appshunter.io/ios/app/shelf-scan-book-spine-scanner/id6754824642/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Monetization | — | Free |
| Size | 24 MB | 26 MB |
| Requires iOS | **14.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Knowuro](https://appshunter.io/developer/1728721237) | [Daniel Anthony Dolewski Ii](https://appshunter.io/developer/1850317130) |

## What reviewers say

### Knowuro reader

[App page](https://appshunter.io/ios/app/knowuro-reader/id6477208617)

**In-app purchases:** none


### Shelf Scan

[App page](https://appshunter.io/ios/app/shelf-scan-book-spine-scanner/id6754824642)

Instantly identify books from a photo of any bookshelf using AI. See ratings at a glance and discover your next great read. Integrates with your reading list to highlight books you want to read.

**Highlights:** Instant book recognition from shelf photos, View book ratings at a glance, Reading list integration, Smart highlighting of to-read books, Scan history saving, No account required for basic use

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Knowuro reader free?

Knowuro reader is free to download, with no in-app purchases.

### Is Shelf Scan free?

Shelf Scan is free to download, with no in-app purchases.

### Do Knowuro reader or Shelf Scan have ads?

Neither Knowuro reader nor Shelf Scan shows ads.

### Which is updated more often, Knowuro reader or Shelf Scan?

Knowuro reader ships an update every 4 weeks, and Shelf Scan monthly. Most recently, Knowuro reader was updated on October 23, 2026 and Shelf Scan on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*