Jayson vs Swifty Compiler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jayson
This app allows you to view and edit JSON files directly on your device. It offers features like tabbed browsing, split-screen comparisons, and integration with Siri Shortcuts and the Share Sheet for easy JSON parsing and management.
- Browse JSON files
- Table or syntax highlighted text view
- Tabbed interface
- Multiple splits for comparison
- Siri Shortcuts integration
- Share Sheet Actions
- URL schemes
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Jayson is a JSON viewer and editor for iPhone and iPad. Browse JSON as a structure, edit values, and save your changes back to the file. Whether you're inspecting an API response, checking a config file, or making a quick fix on the go, Jayson turns raw JSON into something you can actually read and change. BROWSE AND EDIT - Open JSON files stored on your device or in iCloud Drive. - Toggle between a structured table view and syntax highlighted text. - Add new values and keys, and save your changes back to the file. - Parse text or the contents of a URL from your clipboard into JSON. - Highlight a key from a child of an array to get a quick overview of your data. TABS, SPLITS, AND WINDOWS - Switch between files, or different objects in a single file, using tabs. - Compare JSON in a single file or across files using multiple splits. - Open multiple windows on the iPad. WORKS WITH SHORTCUTS Jayson integrates with Shortcuts, which comes in handy for debugging API calls, previewing JSON files, and building workflows around JSON. - Pass a response from Get Contents of URL to Jayson to see how it is structured. - Open JSON as a document you keep working on, or as a temporary preview. - Format JSON and hand the result to the next action, using spaces or tabs. FREE, WITH AN OPTIONAL UPGRADE Jayson's core functionality is free. Browsing, editing, saving, splits, Shortcuts, and working with up to two tabs at a time cost nothing. A one-time in-app purchase enables having more than two tabs open at once, switching between light and dark themes, and personalizing the app icon, accent color and type icons. One purchase, no subscription.
Swifty Compiler
Write, run, and experiment with Swift code on your mobile device. This app functions as a personal playground for testing algorithms, prototyping ideas, and enhancing coding skills with a variety of editing tools.
- Write and run Swift code
- Import Swift and Playground files
- Code completion and error highlighting
- Code formatting and syntax correction
- Code snapshots (PNG, JPEG, PDF)
- Dark and light mode support
- Unlimited credits (Premium)
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Write and run Swift code effortlessly, anywhere and anytime. Swifty Compiler is the perfect tool to test algorithms, prototype ideas, or experiment with Swift code on the go. Use it as your personal playground to explore concepts and improve your coding skills. Free Features: • Daily credits⁽¹⁾: 10 credits per day • Import Swift files • Open Playground files and import their Swift files • Share Swift files, Playground files, or text directly to the app • Code Snapshot (PNG, JPEG, HEIC, or PDF) • Adjustable font size and line spacing • Auto-indentation • Code completion suggestions • Auto-closing brackets and quotes • Error highlighting • Bracket and line highlighting • Code block selection • Cursor position indicator • Code snippets • Extra keyboard buttons • Comment/uncomment selection • Markdown comments • Duplicate code • Move line up/down • Indent/Outdent (Shift right/left) • Jump to line or selection • Keyboard shortcuts • Multitasking support on iPad • Dark and light mode support • Share extension support • No ads Premium Features: • Unlimited credits⁽¹⁾ • Share as Swift file • Save Swift files to the Files app (iCloud or local storage) • Auto-save last input • Unlimited Undo/Redo • Code formatting • Add documentation • Syntax correction • Optical Character Recognition (OCR) • Abstract Syntax Tree (AST) • Multiple Swift versions • Font pack • Show invisible characters • Create/Edit custom snippets • Create/Edit custom keyboard buttons • No watermark on code snapshots 1. 1 Credit = 1 Code Execution Feel free to reach us out if have any suggestions or ideas. - Email: taleb.apps@gmail.com - X: @hassantaleb90 - Telegram: @hassantaleb If you enjoy Swifty Compiler, please leave a review to support us!
Screenshots
Verdict
The clearest difference is iOS requirement: Swifty Compiler at 16.0 against Jayson's 26.0. On price, rating, review sentiment and ratings volume there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Jayson sells 1 one-off in-app purchase and Swifty Compiler sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.5 for Jayson against 4.5 for Swifty Compiler. Both are backed by a comparable volume of ratings — 452 and 204 respectively. Written reviews are what separate them: 81% of Jayson's written reviews are positive against 84% of Swifty Compiler's.
Jayson ships an update every 3 weeks, Swifty Compiler fortnightly. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.
| Parameter | Jayson | Swifty Compiler |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (452 ratings) — better | 4.5 (204 ratings) |
| Positive reviews | 80.7% of reviews | 84.3% of reviews — better |
| Number of ratings | 452 — better | 204 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | #106 | #57 — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 41 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Simon B. Støvring | Hassan Taleb |
Customer experience
Jayson
Swifty Compiler
User reviews
Jayson
From 452 App Store ratingsWhat we love
- 👍 Elegant and intuitive JSON editing interface
- 🎯 Perfect for FNF mod development and updates
- 📱 Excellent iOS implementation with native feel
- 🔧 Powerful JSON manipulation capabilities
- ⚡ Great Shortcuts and URL scheme integration
Room to improve
- 🐛 Frequent crashes and instability issues
- 🔋 High battery consumption and device heating
- ❌ Missing search functionality
- 📵 Safari browser support issues
- 🔒 Limited free features, paywall for advanced options
Swifty Compiler
From 204 App Store ratingsWhat we love
- 🚀 Fast code execution
- 👍 Easy to use interface
- 💡 Great for on-the-go coding
- ✨ Good for learning Swift
- ✅ Useful for testing logic
Room to improve
- 💰 High cost for features
- ⚠️ Limited free usage
- 💸 Subscription model criticized
- 🚫 No offline mode
- 🤔 Unreasonable charging logic
Bugs and requests
Jayson
Reported bugs
6 issues- App crashes when opening large JSON files (89MB+)
- Crashes on regular use despite functionality
- Device freezing for extended periods
- Safari compatibility broken in recent updates
- Navigation back through JSON structure is unreliable
Show 1 moreShow fewer
- Accidental file exit when attempting to navigate
Requested features
9 requests- Search/find functionality within files
- JSON editing and modification capabilities
- XML format support
- Split-view for comparing different arrays
- Export functionality for edited JSON
Show 4 moreShow fewer
- Comment recognition in JSON files
- Plain text editor option
- Improved file size handling for large documents
- Better navigation controls on mobile devices
Swifty Compiler
Reported bugs
10 issues- Refund screenshots are not correct
- Kept loading without doing anything
- Issues related to JSON parsing
- Cannot save projects without paying
- Cannot use Date or Calendar as types
Show 5 moreShow fewer
- Misleading screenshots about Swift version
- Cannot overwrite files in iCloud
- Console does not print anything
- Limited code execution per day
- Cannot call a function before it's created
Requested features
18 requests- Support for newer Swift versions
- Ability to import projects online
- Cache 'premium' pop-up
- Support multithreading (GCD)
- Fix console printing bug
Show 13 moreShow fewer
- Ability to add frameworks
- Support for SwiftUI
- Offline mode support
- Autofill feature
- Highlighting lines with warnings/errors
- Show which compiler is used
- Ability to change Swift version without paying
- More than one Swift version option
- Import own fonts
- Call basic modules like SwiftUI
- Use input and output as command tool
- Overwrite existing files in iCloud
- Korean language version
In-app purchases
Jayson
- Unlock Everything$4.99
Swifty Compiler
- Premium Weekly Subscription$4.997 Days
- Premium Monthly Subscription$12.991 Month
- Premium Yearly Subscription$79.991 Year
- Premium Lifetime$99.00








