# Cognition vs Stamp Identifier AI

The clearest difference is rating: Cognition at 5.0 against Stamp Identifier AI's 4.4. Cognition also leads on in-app purchases (none vs 2) and ads (none vs shown). Stamp Identifier AI's advantage is ratings volume (29 vs 1). On price and device support there is nothing between them.

Both are free to download. Stamp Identifier AI sells 2 in-app purchases, starting at $4.99 per 7 days. Cognition asks for nothing beyond the download.

Cognition holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Stamp Identifier AI has 29 ratings behind it against 1, so its average is the more settled of the two.

Cognition ships an update every 3 weeks, Stamp Identifier AI every 2 months. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Cognition | Stamp Identifier AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cognition/id1123981796/reviews)** | [4.4 (29 ratings)](https://appshunter.io/ios/app/stamp-identifier-ai/id6737807333/reviews) |
| Number of ratings | 1 | **29** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 91 MB | 17 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Insight Online](https://appshunter.io/developer/1525363373) | [Arda Sen](https://appshunter.io/developer/1670665250) |

## What reviewers say

### Cognition

[App page](https://appshunter.io/ios/app/cognition/id1123981796)

Connects students with qualified tutors based on location. The platform facilitates lesson requests, tutor applications, and secure in-app payments, streamlining the tutoring process for both parties.

**Highlights:** Location-based tutor matching, Lesson request system, Tutor application process, Student-based tutor selection, Secure in-app payments, Tutor and student profiles

**Features:** macOS Compatibility

**In-app purchases:** none


### Stamp Identifier AI

[App page](https://appshunter.io/ios/app/stamp-identifier-ai/id6737807333)

Instantly identify stamps by taking or uploading a photo. Get detailed information including value, rarity, and historical context. Organize your collection and learn about each stamp's unique story.

**Highlights:** AI-powered stamp identification, Detailed stamp profiles, Estimated value and rarity, Production year and subject matter, Personal stamp collection tracker, Historical context

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Yearly Subscription | $29.99 | per year |


## Frequently asked questions

### Is Cognition free?

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

### Is Stamp Identifier AI free?

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

### Which has better reviews, Cognition or Stamp Identifier AI?

Cognition is rated higher. Cognition averages 5.0 out of 5 from 1 ratings, while Stamp Identifier AI averages 4.4 from 29 ratings.

### Do Cognition or Stamp Identifier AI have ads?

Stamp Identifier AI shows ads; Cognition does not.

### Which is updated more often, Cognition or Stamp Identifier AI?

Cognition ships an update every 3 weeks, and Stamp Identifier AI every 2 months. Most recently, Cognition was updated on October 20, 2026 and Stamp Identifier AI on October 25, 2026.

---

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