STL File Viewer Pro vs HTML Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STL File Viewer Pro
Easily view, rotate, and inspect 3D STL files on your iPhone or iPad. Load models instantly from various sources for 3D printing, design review, or engineering inspection.
- Instant STL file loading
- Full 360° rotation and zoom
- Sharp detail rendering
- Light and dark mode support
- Lightweight and fast performance
- Open files from Files, email, AirDrop
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View, Rotate & Inspect Your 3D STL Files with Ease! Open any STL file in seconds — no sign-up, no clutter, just your 3D model ready to explore. STL File Viewer lets you load, rotate, zoom, and inspect 3D STL files directly on your iPhone or iPad. Built for speed, it handles everything from small parts to complex models smoothly. Whether you're reviewing jewelry CAD files before production, checking 3D print files for errors, or inspecting engineering designs on the go — this is the fastest way to view STL files on iOS. WHAT YOU GET: Instant file loading — open STL files from Files, email, AirDrop, or any app Full 360° control — rotate, zoom, and pan with intuitive touch gestures Measure STL file distance between 2 points Estimate STL File Weight in different materials Sharp detail rendering Light & dark mode — comfortable viewing anywhere Lightweight & fast — no bloat, no lag BUILT FOR: - 3D printing enthusiasts previewing files before printing - Jewelry designers reviewing CAD models - Engineers and architects inspecting parts on the go - Students and hobbyists exploring 3D models No account required. Just open and view using our simple STL Viewer App. Download now and see your CAD files the way they're meant to be seen. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
HTML Viewer
Inspect and analyze the HTML source code of any website or local files. Features include element inspection, syntax highlighting, and multi-tab support for efficient workflow. Ideal for developers and students learning web technologies.
- View website source code
- Inspect elements
- Open local/iCloud HTML files
- Multiple tabs support
- Syntax highlighting
- Search and copy code
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Inspect Website Source Code, Syntax Highlighting & More – Ad-Free with "HTML Viewer: View Source". "HTML Viewer: View Source" is the perfect tool for developers, students, and curious minds who want to view, inspect, and analyze HTML code on the go — with no ads, ever. Key Features: ► View Source Code Instantly: Load and inspect the HTML source of any website. ► Inspect Elements: Tap into any part of the page to reveal the underlying HTML – just like browser dev tools. ► Open Local or iCloud HTML Files: Easily access saved HTML files from your device or iCloud Drive. ► Multiple Tabs Support: Work on multiple files or websites at once – perfect for multitaskers. ► Syntax Highlighting: Enjoy beautifully formatted code that’s easy to read and navigate. ► Search & Copy Code: Find what you need in a flash and copy snippets effortlessly. Whether you're debugging, learning HTML, or just curious how a webpage works, HTML Viewer: View Source delivers a smooth, professional experience — all ad-free. I love feedback! Get in touch with me at support@umango.in. Check out our privacy policy at https://sites.google.com/view/html-inspector/privacy-policy and our terms of use at https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is ads: HTML Viewer at none against STL File Viewer Pro's shown. HTML Viewer also leads on review sentiment (25% vs 10%) and iOS requirement (13.0 vs 16.6). STL File Viewer Pro's advantage is ratings volume (65 vs 9). On price, rating, update cadence and in-app purchases 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. STL File Viewer Pro sells 3 in-app purchases, starting at $1.99 per 7 days and HTML Viewer sells 4 in-app purchases, starting at $14.99 per year. 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 STL File Viewer Pro against 4.6 for HTML Viewer. That said, the two scores are not equally well evidenced: STL File Viewer Pro has 65 ratings behind it against 9, so its average is the more settled of the two. Written reviews are what separate them: 10% of STL File Viewer Pro's written reviews are positive against 25% of HTML Viewer's.
STL File Viewer Pro ships an update fortnightly, HTML Viewer every 8 days. The most recent releases landed on September 24, 2026 and September 16, 2026 respectively.
| Parameter | STL File Viewer Pro | HTML Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (65 ratings) | 4.6 (9 ratings) — better |
| Positive reviews | 10.0% of reviews | 25.0% of reviews — better |
| Number of ratings | 65 — better | 9 |
| Update frequency | Fortnightly | Every 8 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #33 — better | #61 |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 84 MB |
| Age rating | 4+ | 17+ |
| Developer | Andeesh Mehdi Syed | Utsav Mangla |
Customer experience
STL File Viewer Pro
HTML Viewer
In-app purchases
STL File Viewer Pro
- Weekly3 Days trial$1.997 Days
- Monthly3 Days trial$3.991 Month
- Ad Free for 1 Year3 Days trial$24.991 Year
HTML Viewer
- HTML Viewer - All access - Mid$14.991 Year
- HTML Viewer - All access - Max14 Days trial$19.991 Year
- HTML Viewer - All access - Max$19.991 Year
- HTML Viewer - Lifetime$9.99
Questions
Is STL File Viewer Pro free?
Is HTML Viewer free?
Which has better reviews, STL File Viewer Pro or HTML Viewer?
Do STL File Viewer Pro or HTML Viewer have ads?
Which is updated more often, STL File Viewer Pro or HTML Viewer?
Which is more popular, STL File Viewer Pro or HTML Viewer?
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