SeaKey vs Shelf Scanner.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SeaKey
This toolbox helps identify seaweeds found in the German North Sea. It features an interactive key for species identification and detailed taxon profiles for verification. A glossary is also included to explain scientific terms.
- Interactive Identification Key
- Species identification
- Taxon Profiles
- Glossary of scientific terms
- German North Sea focus
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This toolbox assists you in identifying the seaweeds of the German North Sea. Use the interactive Identification Key for species identification. Verify your identification with additional information from Taxon Profiles. Refer to the Glossary for explanation of scientific terms.
Shelf Scanner.
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.
- Scan book barcodes for value
- Photo scan entire bookshelves
- Live pricing data
- Sell books for profit
- Source from major online sellers
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Find Valuable Books. That's what Shelf Scanner makes it easy to do, our app can: - Scan book barcodes to find their values - Take a photo of a bookshelf and find the value of each book on the shelf - Provide live pricing data on any book you scan With Shelf Scanner you can easy find what your bookshelf, those old books you have laying around, or books from thrift stores, are worth, and sell them for a profit. Unlike other book scanning apps, we provide live pricing data of what your book is worth, sourced from the largest online book sellers and based on current listing prices. This means you get the most money for your books, quick and easy. Download Shelf Scanner today and start turning books into cash. Terms Of Use can be found at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.termsfeed.com/live/619c315c-27b8-4e47-9aaf-20bad24d5d6e
Screenshots
Verdict
The clearest difference is rating: SeaKey at 5.0 against Shelf Scanner.'s 4.5. SeaKey also leads on in-app purchases (none vs 3) and device support (3 vs 1). Shelf Scanner.'s advantage is ratings volume (252 vs 1). On price, update cadence and ads 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. Shelf Scanner. sells 3 in-app purchases, starting at $4.99 per 7 days. SeaKey asks for nothing beyond the download.
SeaKey holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Shelf Scanner. has 252 ratings behind it against 1, so its average is the more settled of the two.
SeaKey ships an update every 8 months, Shelf Scanner. every 7 months. The most recent releases landed on September 29, 2026 and October 13, 2026 respectively.
| Parameter | SeaKey | Shelf Scanner. |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.5 (252 ratings) |
| Positive reviews | — | 9.5% of reviews |
| Number of ratings | 1 | 252 — better |
| Update frequency | Every 8 months | Every 7 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 87 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Code for Nature | Gabe Rogers |
Customer experience
SeaKey
Shelf Scanner.
In-app purchases
SeaKey
No in-app purchases
Shelf Scanner.
- Weekly Pro$4.997 Days
- Monthly Pro$15.991 Month
- Annual Pro7 Days trial$48.991 Year
