# Design Patterns Illustrated vs PrepGen.ai

The clearest difference is in-app purchases: Design Patterns Illustrated at none against PrepGen.ai's 8. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PrepGen.ai sells 8 one-off in-app purchases. Design Patterns Illustrated asks for nothing beyond the download.

## The numbers

| Metric | Design Patterns Illustrated | PrepGen.ai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/prepgenai/id6753906835/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Monthly |
| Monetization | — | Free |
| Size | 8 MB | 77 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Apps Foundry Inc.](https://appshunter.io/developer/1772141640) | [Keppek Labs Inc](https://appshunter.io/developer/1845632682) |

## What reviewers say

### Design Patterns Illustrated

[App page](https://appshunter.io/ios/app/design-patterns-illustrated/id6736484312)

**Features:** macOS Compatibility

**In-app purchases:** none


### PrepGen.ai

[App page](https://appshunter.io/ios/app/prepgenai/id6753906835)

This AI-powered study companion creates personalized video lessons, automated study plans, and adaptive practice tests. It analyzes performance to focus on areas needing improvement and provides concise summaries for rapid review.

**Highlights:** AI video lessons on any topic, Automated smart study planner, Personalized learning paths, Adaptive practice tests with feedback, Concise learning summaries, Progress analytics and insights, Supports various college and professional exams

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| College Prep – 30 Day Pass | $4.99 | one-time |
| College Prep – 90 Day Pass | $9.99 | one-time |
| College Prep – 6 Month Pass | $17.99 | one-time |
| Professional Exams – 30 Days Pass | $19.99 | one-time |
| College Prep – 1 Year Pass | $29.99 | one-time |
| Professional Exams – 90 Days Pass | $39.99 | one-time |
| Professional Exams – 6 Months Pass | $69.99 | one-time |
| Professional Exams – 1 Year Pass | $99.00 | one-time |


## Frequently asked questions

### Is Design Patterns Illustrated free?

Design Patterns Illustrated is free to download, with no in-app purchases.

### Is PrepGen.ai free?

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

### Do Design Patterns Illustrated or PrepGen.ai have ads?

Neither Design Patterns Illustrated nor PrepGen.ai shows ads.

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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.*