Jayson vs UI Tracer
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
Read full descriptionHide full description
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.
UI Tracer
This app allows developers to preview various SwiftUI view styles without recompiling code. It offers comparisons across multiple Apple platforms, including iOS, iPadOS, watchOS, tvOS, and macOS, streamlining the design process.
- Preview SwiftUI view styles
- Compare across iOS, iPadOS, watchOS, tvOS, macOS
- No recompilation needed
- Cross-platform code compatibility
- Extensible view library
Read full descriptionHide full description
When you are developing your app using SwiftUI, it is really time consuming to compare all possible styles of buttons, list etc to choose one fits best. This app help you check all possible options for SwiftUI's views without recompiling. Compare how they look like on iOS, iPadOS, watchOS, tvOS and MacOS. Same code for all platforms where possible. The list of views will be extended.
Screenshots
Verdict
The clearest difference is price: Jayson at Free against UI Tracer's $2.99. Jayson also leads on ratings volume (425 vs 4) and chart position (#81 vs unranked). UI Tracer's advantage is rating (5.0 vs 4.5) and update cadence (every 2 days vs every 3 weeks). On ads, in-app purchases and iOS requirement 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
Jayson is free to download; UI Tracer costs $2.99 up front. Jayson sells 1 one-off in-app purchase and UI Tracer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
UI Tracer holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Jayson has 425 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 81% of Jayson's written reviews are positive against 100% of UI Tracer's.
Jayson ships an update every 3 weeks, UI Tracer every 2 days. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.
| Parameter | Jayson | UI Tracer |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.5 (425 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 80.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 425 — better | 4 |
| Update frequency | Every 3 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | #81 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — better |
| Requires iOS | 26.0 | 26.0 |
| Further details — not scored | ||
| Size | 41 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Simon B. Støvring | Leonid Liadveikin |
Customer experience
Jayson
UI Tracer
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
UI Tracer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Jayson
- Unlock Everything$4.99
UI Tracer
- Tip$0.99
- Donation$4.99









