# Stamp Identifier vs Cachet

The clearest difference is update cadence: Cachet at weekly against Stamp Identifier's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stamp Identifier sells 4 in-app purchases, starting at $6.99 per 7 days and Cachet sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Stamp Identifier ships an update every 3 weeks, Cachet weekly. Both last shipped on November 5, 2026.

## The numbers

| Metric | Stamp Identifier | Cachet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (17 ratings)](https://appshunter.io/ios/app/stamp-identifier-value-check/id6759895469/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 31 MB | 59 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [加兴 王](https://appshunter.io/developer/1384089221) | [Arun Singh](https://appshunter.io/developer/6787197411) |

## What reviewers say

### Stamp Identifier

[App page](https://appshunter.io/ios/app/stamp-identifier-value-check/id6759895469)

Instantly identify, grade, and estimate the value of your stamps using advanced AI. Turn your device into a professional philatelic appraisal tool to understand the true worth of your collection.

**Highlights:** AI-powered stamp identification, Real-time market valuation, Expert condition grading, Portfolio tracking, Export PDF appraisals, Shareable digital cards

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Weekly | $6.99 | per 7 days |
| Pro - Weekly | $6.99 | per 7 days |
| Pro - Yearly | $39.99 | per year |
| Pro - Yearly | $39.99 | per year |


### Cachet

[App page](https://appshunter.io/ios/app/cachet-stamp-identifier/id6787197409)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cachet Pro Weekly | $2.99 | per 7 days |
| Cachet Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is Stamp Identifier free?

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

### Is Cachet free?

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

### Do Stamp Identifier or Cachet have ads?

Neither Stamp Identifier nor Cachet shows ads.

### Which is updated more often, Stamp Identifier or Cachet?

Stamp Identifier ships an update every 3 weeks, and Cachet weekly. Most recently, Stamp Identifier was updated on November 5, 2026 and Cachet on November 5, 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.*