# RequestLab vs Design Patterns for Devs

The clearest difference is in-app purchases: RequestLab at none against Design Patterns for Devs's 1. RequestLab also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (16.0 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. RequestLab asks for nothing beyond the download.

RequestLab ships an update every 3 weeks, Design Patterns for Devs every 3 months. The most recent releases landed on September 22, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | RequestLab | Design Patterns for Devs |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 16 MB | 16 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Martin Albrecht](https://appshunter.io/developer/1479205686) | [Daniel Gogozan](https://appshunter.io/developer/1664769372) |

## What reviewers say

### RequestLab

[App page](https://appshunter.io/ios/app/requestlab/id6477221079)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is RequestLab free?

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

### Is Design Patterns for Devs free?

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

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

Neither RequestLab nor Design Patterns for Devs shows ads.

### Which is updated more often, RequestLab or Design Patterns for Devs?

RequestLab ships an update every 3 weeks, and Design Patterns for Devs every 3 months. Most recently, RequestLab was updated on September 22, 2026 and Design Patterns for Devs on September 28, 2026.

---

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