STL File Viewer Pro vs SiteGrade
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/
SiteGrade
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SiteGrade checks the security configuration a website serves to browsers, grades it A to F, and explains every finding in plain English with the exact change to make. Type a domain on iPhone or iPad, or share a page straight from Safari, and the answer takes seconds. One purchase also covers Mac. WHAT IT CHECKS Security headers - Content-Security-Policy, including report-only policies - Strict-Transport-Security (HSTS), with max-age and includeSubDomains - X-Content-Type-Options - X-Frame-Options and CSP frame-ancestors - Referrer-Policy - Permissions-Policy - Cross-Origin-Opener-Policy, Cross-Origin-Embedder-Policy and Cross-Origin-Resource-Policy - Server and framework version disclosure - Legacy X-XSS-Protection TLS/SSL certificate - Chain validity, trusted root, self-signed and hostname-mismatch detection - Expiry date, with a warning well before it becomes an outage - Negotiated protocol version, TLS 1.0 through TLS 1.3 Transport - Whether plain HTTP redirects to HTTPS, asked on port 80 directly - The full redirect chain, including cross-host and downgrading hops - Mixed content: the page loads in an isolated web view and every insecure subresource request is recorded, active and passive DNS and email - A, AAAA, CNAME and MX records - SPF and DMARC presence and policy - Reported as information only. DNS and email findings never move the letter grade. EXPLAINED, NOT DUMPED Every finding answers three questions: what it means, why it matters, and how to fix it, with copy-ready nginx and Apache values and a command to confirm the fix landed. There is also a fix prompt written from your own report that you can hand to a coding agent. THE GRADE SHOWS ITS WORK Points, caps and bands come from a rubric published inside the app on a "How grading works" screen, so you can always answer "why a B?". Every finding shows the raw evidence behind it: the header value received, the certificate fields, the DNS answers. FREE AND PRO Checking sites is free and unlimited, and every free check shows the grade and the full finding list. Pro is a one-time purchase, never a subscription. It covers iPhone, iPad and Mac, and it is shareable with your family. Pro unlocks: - Every finding's plain-English explanation, fix snippet and evidence - History, kept on your device and grouped by domain, so a grade has a trend instead of a moment - Compare, so a re-check shows what was fixed, what regressed and what is new - Export of the full report as Markdown or PDF, and the fix prompt PRIVATE BY CONSTRUCTION No accounts, no servers, no analytics, no trackers, no ads. Nothing you check is sent to us, because there is nowhere for it to go. Your reports stay on your device. HONEST ABOUT SCOPE This grade reflects the security configuration a site serves to browsers. It is not a security audit. Every check is passive and read-only: a GET request, one TLS handshake, DNS lookups and one page load, which is the same traffic a browser makes when it opens the page. SiteGrade is built for checking your own site or a site you manage. Terms of Use: https://joneslabs.dev/terms
Screenshots
Verdict
The clearest difference is in-app purchases: SiteGrade at none against STL File Viewer Pro's 3. SiteGrade also leads on ads (none vs shown). STL File Viewer Pro's advantage is update cadence (fortnightly vs every 2 months) and chart position (#86 vs unranked). On price 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. STL File Viewer Pro sells 3 in-app purchases, starting at $1.99 per 7 days. SiteGrade asks for nothing beyond the download.
STL File Viewer Pro ships an update fortnightly, SiteGrade every 2 months. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.
| Parameter | STL File Viewer Pro | SiteGrade |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (81 ratings) — better | — |
| Positive reviews | 10.0% of reviews | — |
| Number of ratings | 81 — better | — |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #86 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 16.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 16 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Andeesh Mehdi Syed | JonesLabs LLC |
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
SiteGrade
No in-app purchases
Questions
Is STL File Viewer Pro free?
Is SiteGrade free?
Do STL File Viewer Pro or SiteGrade have ads?
Which is updated more often, STL File Viewer Pro or SiteGrade?
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