# SharkToothID vs Digital Stamp Decoder

The clearest difference is price: SharkToothID at Free against Digital Stamp Decoder's $2.99. SharkToothID also leads on ratings volume (19 vs 2). Digital Stamp Decoder's advantage is rating (5.0 vs 4.3) and iOS requirement (15.6 vs 18.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

SharkToothID is free to download; Digital Stamp Decoder costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Digital Stamp Decoder holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: SharkToothID has 19 ratings behind it against 2, so its average is the more settled of the two.

SharkToothID ships an update every 7 months, Digital Stamp Decoder every 5 months. The most recent releases landed on September 24, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | SharkToothID | Digital Stamp Decoder |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.3 (19 ratings)](https://appshunter.io/ios/app/sharktoothid/id1659293323/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/digital-stamp-decoder/id1671241165/reviews)** |
| Number of ratings | **19** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 months** |
| Monetization | **Free** | Paid |
| Size | 164 MB | 205 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Steven Sharpe](https://appshunter.io/developer/1547019547) | [Graphic Security Systems Corp.](https://appshunter.io/developer/1176688211) |

## What reviewers say

### SharkToothID

[App page](https://appshunter.io/ios/app/sharktoothid/id1659293323)

Easily identify shark teeth, scallops, and other fossils found along the Carolinas and Florida coasts. This app covers the most common specimens you're likely to discover.

**Highlights:** Identify shark teeth, Identify Pecten and other fossils, Covers Carolinas and Florida coasts, Focuses on common fossils, Easy to use interface

**In-app purchases:** none


### Digital Stamp Decoder

[App page](https://appshunter.io/ios/app/digital-stamp-decoder/id1671241165)

Reveal hidden images on USPS postage stamps using advanced Scrambled Indicia® technology. Originally designed for anti-counterfeiting, this app offers stamp collectors a unique way to authenticate and appreciate their collection. Explore the innovative world of philately with this modern collector's tool.

**Highlights:** Reveal hidden stamp images, Utilizes Scrambled Indicia® technology, Authenticates USPS postage stamps, Aids stamp collectors and philatelists, Showcase stamp collection

**In-app purchases:** none


## Frequently asked questions

### Is SharkToothID free?

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

### Is Digital Stamp Decoder free?

Digital Stamp Decoder costs $2.99, with no in-app purchases.

### Which has better reviews, SharkToothID or Digital Stamp Decoder?

Digital Stamp Decoder is rated higher. SharkToothID averages 4.3 out of 5 from 19 ratings, while Digital Stamp Decoder averages 5.0 from 2 ratings.

### Do SharkToothID or Digital Stamp Decoder have ads?

Neither SharkToothID nor Digital Stamp Decoder shows ads.

### Which is updated more often, SharkToothID or Digital Stamp Decoder?

SharkToothID ships an update every 7 months, and Digital Stamp Decoder every 5 months. Most recently, SharkToothID was updated on September 24, 2026 and Digital Stamp Decoder on June 1, 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.*