Jayson vs GLDF Viewer
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.
GLDF Viewer
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Explore GLDF lighting data files on the go. View product info, light sources, photometry data, and 3D geometries from the Global Lighting Data Format standard. Description (4000 characters max): GLDF Viewer is the essential tool for lighting professionals, designers, and engineers who work with the Global Lighting Data Format (GLDF). FEATURES: • Open and explore GLDF files directly on your iPhone or iPad • View manufacturer and product information • Browse embedded files including photometric data (EULUMDAT/IES) and 3D models • Inspect light source specifications • Explore product variants • View raw XML/JSON data with syntax formatting • Drag and drop GLDF files to open instantly GLDF is the open standard for exchanging luminaire data across lighting design software. With GLDF Viewer, you can quickly inspect lighting product data anywhere. Perfect for: - Lighting designers reviewing product specifications - Engineers validating GLDF exports - Manufacturers checking their product data - Anyone working with digital lighting information
Screenshots
Verdict
The clearest difference is in-app purchases: GLDF Viewer at none against Jayson's 1. GLDF Viewer also leads on iOS requirement (16.0 vs 26.0). Jayson's advantage is chart position (#78 vs unranked). On price, ads and device support 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. GLDF Viewer asks for nothing beyond the download.
| Parameter | Jayson | GLDF Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (425 ratings) — better | — |
| Positive reviews | 80.7% of reviews | — |
| Number of ratings | 425 — better | — |
| Update frequency | Every 3 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #78 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 41 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Simon B. Støvring | Holger Trahe |
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
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- 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
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- Comment recognition in JSON files
- Plain text editor option
- Improved file size handling for large documents
- Better navigation controls on mobile devices
GLDF Viewer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Jayson
- Unlock Everything$4.99
GLDF Viewer
No in-app purchases









