# Psychology vs MathLens

The clearest difference is ads: MathLens at none against Psychology's shown. MathLens also leads on iOS requirement (13.0 vs 16.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Psychology sells 5 in-app purchases, starting at $2.99 per 7 days and MathLens sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Psychology | MathLens |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (579 ratings)](https://appshunter.io/ios/app/psychology-body-language/id1161820429/reviews)** | — |
| Number of ratings | **579** | — |
| Positive reviews | 56.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 55 MB | 49 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yurii Kriuchkov](https://appshunter.io/developer/1084215868) | [ilyas inajjar](https://appshunter.io/developer/1864886343) |

## What reviewers say

### Psychology

[App page](https://appshunter.io/ios/app/psychology-body-language/id1161820429)

Explore the science of human behavior, including body language and microexpressions. Learn to interpret non-verbal cues, understand psychological insights, and test your knowledge with interactive exercises. Enhance your social skills and gain a deeper understanding of people.

**Highlights:** Decoding body language, Master microexpressions, Psychological insights, Interactive quizzes, Real-world application

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly plan | $2.99 | per 7 days |
| Monthly Plan | $4.99 | per month |
| Annual Plan | $14.99 | per year |
| Annual Plan | $14.99 | per year |
| Premium | $2.99 | one-time |

**What reviewers like**

- 📚 Interesting and educational content about body language
- 👍 User-friendly and simple interface design
- 💡 Practical information useful for real-world applications
- 🎯 Comprehensive coverage of body language gestures
- ✨ Well-organized card/memo style presentation

**What reviewers complain about**

- 📺 Excessive ads after every swipe/action
- 💸 Premium version lacks differentiation from free version
- ❌ Inaccurate or contradictory information
- ⚠️ Lacks scientific backing and credible sources
- 🔤 Poor translation quality in some sections

**Reported bugs**

- Video paywall system doesn't work properly
- Text layout issues - explanations cut off on right side
- Incomplete language localization (missing Italian translations)
- Poor translation quality causing comprehension issues
- App optimization issues with newer devices

**Requested features**

- Add more body language gestures and modules
- Include micro-expressions content
- Expand with interactive features (photo emotion recognition)
- Add content on deception from biological perspective
- Include polygraph/lie detection information


### MathLens

[App page](https://appshunter.io/ios/app/mathlens-ai-math-solver/id6793250871)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathLens Premium Weekly | $9.99 | per 7 days |
| MathLens Premium Yearly | $39.99 | per year |


## Frequently asked questions

### Is Psychology free?

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

### Is MathLens free?

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

### Do Psychology or MathLens have ads?

Psychology shows ads; MathLens does not.

---

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