# Design Patterns for Devs vs HTTrail

The clearest difference is in-app purchases: HTTrail at none against Design Patterns for Devs's 1. HTTrail also leads on iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Design Patterns for Devs sells 1 one-off in-app purchase. HTTrail asks for nothing beyond the download.

## The numbers

| Metric | Design Patterns for Devs | HTTrail |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/design-patterns-for-devs/id6754806188/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 23 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Gogozan](https://appshunter.io/developer/1664769372) | [1Moby Co., Ltd.](https://appshunter.io/developer/492061760) |

## What reviewers say

### Design Patterns for Devs

[App page](https://appshunter.io/ios/app/design-patterns-for-devs/id6754806188)

Master software design patterns with interactive flashcards. This app provides comprehensive lessons, code examples, and quizzes to help developers understand and apply architectural concepts for better coding and clearer architecture.

**Highlights:** Interactive flashcards, Gang of Four pattern coverage, Real-world analogies, UML diagrams and code examples, Usage, Pros & Cons, Quizzes for retention

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $9.99 | one-time |


### HTTrail

[App page](https://appshunter.io/ios/app/httrail/id6782789131)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Design Patterns for Devs free?

Design Patterns for Devs is free to download, with in-app purchases available.

### Is HTTrail free?

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

### Do Design Patterns for Devs or HTTrail have ads?

Neither Design Patterns for Devs nor HTTrail 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.*