# Digital Stamp Decoder vs IdentaFly

The clearest difference is price: IdentaFly at Free against Digital Stamp Decoder's $2.99. IdentaFly also leads on update cadence (every 3 weeks vs every 5 months) and ratings volume (108 vs 2). Digital Stamp Decoder's advantage is rating (5.0 vs 3.4) and in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

IdentaFly is free to download; Digital Stamp Decoder costs $2.99 up front. IdentaFly sells 3 in-app purchases, starting at $5.99 per month. Digital Stamp Decoder asks for nothing beyond the download.

Digital Stamp Decoder holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: IdentaFly has 108 ratings behind it against 2, so its average is the more settled of the two.

Digital Stamp Decoder ships an update every 5 months, IdentaFly every 3 weeks. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Digital Stamp Decoder | IdentaFly |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/digital-stamp-decoder/id1671241165/reviews)** | [3.4 (108 ratings)](https://appshunter.io/ios/app/identaflyflyfish-hatch-and-maps/id6470413594/reviews) |
| Number of ratings | 2 | **108** |
| Positive reviews | — | 20.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 205 MB | 131 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Graphic Security Systems Corp.](https://appshunter.io/developer/1176688211) | [IdentaFly LLC](https://appshunter.io/developer/1689467456) |

## What reviewers say

### 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


### IdentaFly

[App page](https://appshunter.io/ios/app/identaflyflyfish-hatch-and-maps/id6470413594)

This app enhances fly fishing by identifying flies, forecasting hatches, and providing location-based water reports with recommended patterns. It also offers a journal to track catches and expert tips for anglers of all levels.

**Highlights:** Instant fly recognition via image, Hatch forecast based on location, Water reports and recommended flies, Catch tracking journal, Database of flies and insects, Expert fishing tips

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $5.99 | per month |
| Annual Subscription | $29.99 | per year |
| Annual Subscription | $29.99 | per year |

**What reviewers like**

- 👍 Amazing concept
- 💡 Hatch forecast awesome
- 👍 Customer service prompt
- 👍 Helpful for new anglers
- 👍 Great for fly box organization

**What reviewers complain about**

- 😞 Fly identification inaccurate
- 😞 Scan feature doesn't work
- 😞 Misses common flies
- 😞 Not worth the cost
- 😞 Limited library

**Reported bugs**

- Scan feature doesn't work with iPhone
- ID tool is inaccurate
- Camera features not working as expected
- App won't open without internet
- Auto-detect takes forever to lock on

**Requested features**

- Allow offline use
- Integrate Google Lens
- Offer a free trial
- Make app free or charge upfront


## Frequently asked questions

### Is Digital Stamp Decoder free?

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

### Is IdentaFly free?

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

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

Digital Stamp Decoder is rated higher. Digital Stamp Decoder averages 5.0 out of 5 from 2 ratings, while IdentaFly averages 3.4 from 108 ratings.

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

Neither Digital Stamp Decoder nor IdentaFly shows ads.

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

Digital Stamp Decoder ships an update every 5 months, and IdentaFly every 3 weeks. Most recently, Digital Stamp Decoder was updated on October 7, 2026 and IdentaFly on October 15, 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.*