# Delfin Check vs Stamp Identifier

The clearest difference is in-app purchases: Delfin Check at none against Stamp Identifier's 2. Stamp Identifier's advantage is update cadence (every 6 days vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stamp Identifier sells 2 in-app purchases, starting at $2.99 per 7 days. Delfin Check asks for nothing beyond the download.

Delfin Check ships an update every 7 months, Stamp Identifier every 6 days. Both last shipped on November 9, 2026.

## The numbers

| Metric | Delfin Check | Stamp Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (6 ratings)](https://appshunter.io/ios/app/stamp-identifier-stamplet/id6756788107/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 days** |
| Monetization | — | Freemium |
| Size | 40 MB | 52 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Alberto Garcia Arroyo](https://appshunter.io/developer/1852063931) | [VIKSVA, MB](https://appshunter.io/developer/1821126705) |

## What reviewers say

### Delfin Check

[App page](https://appshunter.io/ios/app/delfin-check-in/id6755120600)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stamp Identifier

[App page](https://appshunter.io/ios/app/stamp-identifier-stamplet/id6756788107)

Instantly identify and value postage stamps with advanced AI. Get accurate appraisals, condition assessments, and detect rare errors from a single photo. Manage your collection and track its value over time.

**Highlights:** AI-powered stamp identification, Instant valuation and price guide, Professional condition assessment and grading, Detection of rare errors and varieties, Two-sided comprehensive analysis, Stamp collection management and portfolio tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium weekly | $2.99 | per 7 days |
| Yearly subscription | $34.99 | per year |


## Frequently asked questions

### Is Delfin Check free?

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

### Is Stamp Identifier free?

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

### Do Delfin Check or Stamp Identifier have ads?

Neither Delfin Check nor Stamp Identifier shows ads.

### Which is updated more often, Delfin Check or Stamp Identifier?

Delfin Check ships an update every 7 months, and Stamp Identifier every 6 days. Most recently, Delfin Check was updated on November 9, 2026 and Stamp Identifier on November 9, 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.*