# Stamp Identifier vs World Clock

The clearest difference is rating: World Clock at 5.0 against Stamp Identifier's 4.4. Stamp Identifier's advantage is update cadence (every 4 days vs every 3 weeks) and iOS requirement (15.6 vs 18.0). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Stamp Identifier sells 2 in-app purchases, starting at $7.99 per 7 days and World Clock sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

World Clock holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 16 and 7 respectively. Written reviews point the same way: 94% of Stamp Identifier's written reviews are positive against 100% of World Clock's.

Stamp Identifier ships an update every 4 days, World Clock every 3 weeks. The most recent releases landed on October 30, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Stamp Identifier | World Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (16 ratings)](https://appshunter.io/ios/app/stamp-identifier-stamp-id/id6742707724/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/world-clocktimezone-converter/id6759943378/reviews)** |
| Number of ratings | **16** | 7 |
| Positive reviews | 94.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 54 MB | 32 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ABD Co.](https://appshunter.io/developer/1825657293) | [Apphaze](https://appshunter.io/developer/1856021247) |

## What reviewers say

### Stamp Identifier

[App page](https://appshunter.io/ios/app/stamp-identifier-stamp-id/id6742707724)

Instantly identify postage stamps by taking a photo. This app uses AI to provide details like origin, value, and historical context. Organize your collection and connect with other enthusiasts.

**Highlights:** AI-powered stamp identification, Detailed stamp information (origin, value, history), Extensive global stamp database, Collection organization and sorting, Community features and expert insights, Market trends and educational resources

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $7.99 | per 7 days |
| Yearly Access | $34.99 | per year |


### World Clock

[App page](https://appshunter.io/ios/app/world-clocktimezone-converter/id6759943378)

Easily track time across multiple cities with visual gradients and an intuitive converter. Organize contacts by time zone, calculate dates, and utilize customizable widgets. Works offline for core functionality.

**Highlights:** Instant time conversion with visual slider, Hourly timeline grid with overlapping work times, Organize contacts into groups by time zone, Date and duration calculator, Customizable widgets for home screen, Offline functionality for core features

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| World Clock Pro Monthly | $4.99 | per month |
| World Clock Pro Yearly | $19.99 | per year |
| World Clock Pro Lifetime Access | $29.99 | one-time |


## Frequently asked questions

### Is Stamp Identifier free?

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

### Is World Clock free?

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

### Which has better reviews, Stamp Identifier or World Clock?

World Clock is rated higher. Stamp Identifier averages 4.4 out of 5 from 16 ratings, while World Clock averages 5.0 from 7 ratings.

### Do Stamp Identifier or World Clock have ads?

Neither Stamp Identifier nor World Clock shows ads.

### Which is updated more often, Stamp Identifier or World Clock?

Stamp Identifier ships an update every 4 days, and World Clock every 3 weeks. Most recently, Stamp Identifier was updated on October 30, 2026 and World Clock on November 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*