# Source 3 vs Leaflet for Swift&Algorithm

The clearest difference is price: Leaflet for Swift&Algorithm at Free against Source 3's $0.99. Leaflet for Swift&Algorithm also leads on update cadence (every 8 days vs every 2 months) and review sentiment (71% vs 44%). Source 3's advantage is in-app purchases (none vs 1) and chart position (#64 vs unranked). On ads and device support there is nothing between them.

Leaflet for Swift&Algorithm is free to download; Source 3 costs $0.99 up front. Leaflet for Swift&Algorithm sells 1 one-off in-app purchase. Source 3 asks for nothing beyond the download.

Leaflet for Swift&Algorithm holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Leaflet for Swift&Algorithm has 297 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 44% of Source 3's written reviews are positive against 71% of Leaflet for Swift&Algorithm's.

Source 3 ships an update every 2 months, Leaflet for Swift&Algorithm every 8 days. The most recent releases landed on September 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Source 3 | Leaflet for Swift&Algorithm |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.3 (10 ratings)](https://appshunter.io/ios/app/source-3/id921385542/reviews) | **[4.6 (297 ratings)](https://appshunter.io/ios/app/leaflet-for-swift-and-algorithm/id1420814118/reviews)** |
| Number of ratings | 10 | **297** |
| Positive reviews | 43.8% of reviews | **71.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#64** | — |
| Size | 1 MB | 53 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Street Coder LLC](https://appshunter.io/developer/473955712) | [雷 戴](https://appshunter.io/developer/696880612) |

## What reviewers say

### Source 3

[App page](https://appshunter.io/ios/app/source-3/id921385542)

**Currently charting:** #64 Top Paid · Developer Tools (US App Store)

View the HTML source code of any webpage directly within Safari. This app offers customizable syntax highlighting for a better developer experience on iOS devices.

**Highlights:** View HTML source code, Safari extension integration, Customizable syntax highlighting, Easy access via Action icon, Supports iPhone and iPad

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


### 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)


## Frequently asked questions

### Is Source 3 free?

Source 3 costs $0.99, with no in-app purchases.

### Is Leaflet for Swift&Algorithm free?

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

### Which has better reviews, Source 3 or Leaflet for Swift&Algorithm?

Leaflet for Swift&Algorithm is rated higher. Source 3 averages 4.3 out of 5 from 10 ratings, while Leaflet for Swift&Algorithm averages 4.6 from 297 ratings.

### Do Source 3 or Leaflet for Swift&Algorithm have ads?

Neither Source 3 nor Leaflet for Swift&Algorithm shows ads.

### Which is updated more often, Source 3 or Leaflet for Swift&Algorithm?

Source 3 ships an update every 2 months, and Leaflet for Swift&Algorithm every 8 days. Most recently, Source 3 was updated on September 24, 2026 and Leaflet for Swift&Algorithm on September 30, 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.*