# Psychology vs EngineeringEdge App

The clearest difference is price: EngineeringEdge App at Free against Psychology's $2.99. EngineeringEdge App also leads on update cadence (every 18 months vs every 37 months). Psychology's advantage is in-app purchases (none vs 10) and iOS requirement (13.0 vs 15.5). On ads and device support there is nothing between them.

EngineeringEdge App is free to download; Psychology costs $2.99 up front. EngineeringEdge App sells 10 one-off in-app purchases. Psychology asks for nothing beyond the download.

Psychology ships an update every 37 months, EngineeringEdge App every 18 months. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Psychology | EngineeringEdge App |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/psychology-mind-and-behavior/id6448008312/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 18 months** |
| Monetization | Paid | — |
| Size | 36 MB | 146 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Muhammad Mubeen](https://appshunter.io/developer/1553722821) | [Online Learning](https://appshunter.io/developer/1790866777) |

## What reviewers say

### Psychology

[App page](https://appshunter.io/ios/app/psychology-mind-and-behavior/id6448008312)

This comprehensive offline guide helps you master psychology, covering human behavior, mental processes, and theories. It's designed for students, aspiring therapists, professionals, and anyone curious about the mind, offering career preparation and interview tips.

**Highlights:** Offline learning, 500+ comprehensive lessons, Career preparation, Interview questions and answers, Bookmark important topics, Text-to-speech audio learning, Export lessons as PDF

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

**In-app purchases:** none


### EngineeringEdge App

[App page](https://appshunter.io/ios/app/engineeringedge-app/id6504725128)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package - AZ | $39.99 | one-time |
| Package - BD | $39.99 | one-time |
| Package - BB | $39.99 | one-time |
| Package - BE | $44.99 | one-time |
| Package - BG | $49.99 | one-time |
| Package - BH | $49.99 | one-time |
| Package - BI | $59.99 | one-time |
| Package - BJ | $59.99 | one-time |
| Package - BL | $69.99 | one-time |
| Package - BK | $69.99 | one-time |


## Frequently asked questions

### Is Psychology free?

Psychology costs $2.99, with no in-app purchases.

### Is EngineeringEdge App free?

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

### Do Psychology or EngineeringEdge App have ads?

Neither Psychology nor EngineeringEdge App shows ads.

### Which is updated more often, Psychology or EngineeringEdge App?

Psychology ships an update every 37 months, and EngineeringEdge App every 18 months. Most recently, Psychology was updated on October 9, 2026 and EngineeringEdge App on October 7, 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.*