# Stamp Value Stamp Identifier vs SD Sion School

The clearest difference is in-app purchases: SD Sion School at none against Stamp Value Stamp Identifier's 6. SD Sion School also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Stamp Value Stamp Identifier sells 6 in-app purchases, starting at $4.99 per 7 days. SD Sion School asks for nothing beyond the download.

## The numbers

| Metric | Stamp Value Stamp Identifier | SD Sion School |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (3.6K ratings)](https://appshunter.io/ios/app/stamp-value-stamp-identifier/id6504604156/reviews)** | — |
| Number of ratings | **3.6K** | — |
| Positive reviews | 45.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | — |
| Monetization | Free with in-app purchases | — |
| Size | 75 MB | 4 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ngoc Anh Pham Thi](https://appshunter.io/developer/1588013910) | [CloudSky Technologies Private Limited](https://appshunter.io/developer/1622356622) |

## What reviewers say

### Stamp Value Stamp Identifier

[App page](https://appshunter.io/ios/app/stamp-value-stamp-identifier/id6504604156)

Instantly identify and appraise your stamps using advanced image recognition. Get detailed information on origin, issue date, denomination, and market value to enhance your collecting experience. Ideal for both new and experienced philatelists.

**Highlights:** Image recognition stamp identification, Stamp appraisal and market value, Detailed stamp information (origin, date, denomination), Intuitive user interface, Educational resources for collectors

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO WEEKLY | $4.99 | per 7 days |
| PRO MONTHLY | $9.99 | per month |
| Premium Yearly Trial 7 day | $39.99 | per year |
| Premium Yearly First Month Sale | $39.99 | per year |
| Premium Yearly Trial | $39.99 | per year |
| PRO YEARLY | $39.99 | per year |

**What reviewers like**

- 🚀 Fast and accurate identification
- 👍 Intuitive and user-friendly interface
- 💡 Comprehensive stamp information
- 🔍 Impressive image recognition technology
- 🤝 Excellent community features

**What reviewers complain about**

- 🐛 Occasional crashes and compatibility issues
- 🤖 Inaccurate stamp identification in some cases
- 💸 Subscription model with high pricing
- 🤔 Excessive prompts to write reviews
- 🔄 Repetitive steps when adding stamps to collection

**Reported bugs**

- App crashes after payment
- Unable to open app after subscription
- Incorrect stamp identification (e.g., identifying US stamps as from Cambodia)

**Requested features**

- Dark mode option
- Advanced stamp valuation tools
- Improved batch processing for adding multiple stamps
- More detailed historical and market data
- Enhanced community features for sharing insights


### SD Sion School

[App page](https://appshunter.io/ios/app/sd-sion-school/id6739501309)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stamp Value Stamp Identifier free?

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

### Is SD Sion School free?

SD Sion School is free to download, with no in-app purchases.

### Do Stamp Value Stamp Identifier or SD Sion School have ads?

Stamp Value Stamp Identifier shows ads; SD Sion School does not.

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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.*