# Leaflet for Swift&Algorithm vs OpenPig

The clearest difference is in-app purchases: OpenPig at none against Leaflet for Swift&Algorithm's 1. OpenPig also leads on iOS requirement (13.0 vs 26.0). Leaflet for Swift&Algorithm's advantage is update cadence (every 8 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Leaflet for Swift&Algorithm sells 1 one-off in-app purchase. OpenPig asks for nothing beyond the download.

Leaflet for Swift&Algorithm ships an update every 8 days, OpenPig every 2 months. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Leaflet for Swift&Algorithm | OpenPig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (297 ratings)](https://appshunter.io/ios/app/leaflet-for-swift-and-algorithm/id1420814118/reviews)** | — |
| Number of ratings | **297** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 53 MB | 21 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [雷 戴](https://appshunter.io/developer/696880612) | [ZhiEra LLC](https://appshunter.io/developer/6771887320) |

## What reviewers say

### Leaflet for Swift&Algorithm

[App page](https://appshunter.io/ios/app/leaflet-for-swift-and-algorithm/id1420814118)

This app offers comprehensive learning modules for Swift, SwiftUI, and Combine, alongside data structures and algorithms. It provides micro-classes, tutorials, code style guides, and practical examples to help users master programming concepts and develop efficient applications.

**Highlights:** Swift language tutorials, SwiftUI and Combine development, Data structure and algorithm learning, Micro-classes for core concepts, Code style guide, Algorithm problem-solving examples

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get Pro Version | $0.99 | one-time |

**What reviewers like**

- 👍 Good explanations
- 👍 Easy to use
- 👍 Clean interface
- 👍 Helpful for learning
- 👍 Lovely app

**What reviewers complain about**

- 🐛 Solutions not loading
- 🐛 App crashes on launch
- 🐛 Frequent crashes
- 🐛 Not a true dark mode
- 🐛 Code formatting issues

**Reported bugs**

- Solutions for problems are not loading
- App crashes on first load
- App crashes immediately on launch
- App crashes after first use and backgrounding
- Paid for pro user, but no answers for many questions

**Requested features**

- Add more iOS technical upgrades
- Add filter options for algorithms (e.g., top 100, top 200)
- Allow users to write their own notes for algorithms
- Add JavaScript examples
- Allow users to suggest/edit explanations (wiki-like)


### OpenPig

[App page](https://appshunter.io/ios/app/openpig/id6789591721)

**In-app purchases:** none


## Frequently asked questions

### Is Leaflet for Swift&Algorithm free?

Leaflet for Swift&Algorithm is free to download, with in-app purchases available.

### Is OpenPig free?

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

### Do Leaflet for Swift&Algorithm or OpenPig have ads?

Neither Leaflet for Swift&Algorithm nor OpenPig shows ads.

### Which is updated more often, Leaflet for Swift&Algorithm or OpenPig?

Leaflet for Swift&Algorithm ships an update every 8 days, and OpenPig every 2 months. Most recently, Leaflet for Swift&Algorithm was updated on October 10, 2026 and OpenPig on October 3, 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.*