# SG Libraries vs Shelf Scanner.

The clearest difference is review sentiment: SG Libraries at 92% against Shelf Scanner.'s 10%. SG Libraries also leads on update cadence (every 5 weeks vs every 7 months) and monetization model (free vs free with in-app purchases). Shelf Scanner.'s advantage is ratings volume (252 vs 3). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SG Libraries sells 1 one-off in-app purchase and Shelf Scanner. sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

SG Libraries holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Shelf Scanner. has 252 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 92% of SG Libraries's written reviews are positive against 10% of Shelf Scanner.'s.

SG Libraries ships an update every 5 weeks, Shelf Scanner. every 7 months. The most recent releases landed on September 29, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SG Libraries | Shelf Scanner. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/sg-libraries/id793017134/reviews)** | [4.5 (252 ratings)](https://appshunter.io/ios/app/shelf-scanner/id6503261472/reviews) |
| Number of ratings | 3 | **252** |
| Positive reviews | **91.7% of reviews** | 9.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 7 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 24 MB | 45 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ken Toh](https://appshunter.io/developer/445688316) | [Gabe Rogers](https://appshunter.io/developer/1584630702) |

## What reviewers say

### SG Libraries

[App page](https://appshunter.io/ios/app/sg-libraries/id793017134)

Easily search the library catalog, discover new books, and manage your loans. Find nearby branches, check item availability, and create personalized reading lists. Stay updated on library events and new arrivals.

**Highlights:** Search library catalog, Discover new arrivals and popular titles, Manage loans and reservations, Find library branches and hours, Create favorite lists, Read and write book reviews

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-Free Version | $0.99 | one-time |


### Shelf Scanner.

[App page](https://appshunter.io/ios/app/shelf-scanner/id6503261472)

Easily discover the value of books by scanning barcodes or taking photos of entire shelves. Get live pricing data from major online sellers to maximize your profit when selling your books.

**Highlights:** Scan book barcodes for value, Photo scan entire bookshelves, Live pricing data, Sell books for profit, Source from major online sellers

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $4.99 | per 7 days |
| Monthly Pro | $15.99 | per month |
| Annual Pro | $48.99 | per year |


## Frequently asked questions

### Is SG Libraries free?

SG Libraries is free to download, with in-app purchases available.

### Is Shelf Scanner. free?

Shelf Scanner. is free to download, with in-app purchases available.

### Which has better reviews, SG Libraries or Shelf Scanner.?

SG Libraries is rated higher. SG Libraries averages 4.7 out of 5 from 3 ratings, while Shelf Scanner. averages 4.5 from 252 ratings.

### Do SG Libraries or Shelf Scanner. have ads?

Neither SG Libraries nor Shelf Scanner. shows ads.

### Which is updated more often, SG Libraries or Shelf Scanner.?

SG Libraries ships an update every 5 weeks, and Shelf Scanner. every 7 months. Most recently, SG Libraries was updated on September 29, 2026 and Shelf Scanner. on October 13, 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.*