← Back to browse

Simple Online Ruler

Use Simple Online Ruler to measure actual size on screen in centimeters, millimeters, and inches. Calibrate by auto-detecting your device, entering screen diagonal, or matching a credit card.

Productivity

Added June 20, 2026 · Last analysed June 20, 2026 · via

Own this Launch?
Screenshot of Simple Online Ruler

StackScope records what new websites are built with, the week they launch. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We crawled this one for its tech stack and scored it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 20 June 2026; the live site may have changed since.

Every technology below links to its own page: which other new sites launched with it. Vendors and agencies watch those pages with Stackdar and hear about new adopters the week they ship, from £15 a month.

Simple Online Ruler ships with the launch fundamentals in place, with a thorough launch checklist, fast page loads, and clean crawl signals. What needs work: missing Content-Security-Policy and Strict-Transport-Security, incomplete legal pages, and no email security records.

Launched on Product Hunt on June 20, 2026. The site is served through Cloudflare, with a domain registered 1 week before launch. Our crawler found 7 technologies on this site, covering analytics, CDN, CSS frameworks, and DNS providers. The stack includes Astro, Tailwind CSS, and Cloudflare.

It's also running the same core stack as 839 other launches and tighter on security headers than most Product Hunt launches.

If you own this site, refresh the snapshot and see the full fix list any time →

8.1
StackScope Score
Excellent
100/100 Launch Readiness
Launch ready
4/6 Security Headers
Decent
2/3 Legal
Partial
2/2 Crawl files
Complete
100/100 Performance
Fast
Vibe Score 0 · No AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (7)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Protocol HTTP/3
Build & Framework
CSS framework Tailwind CSS
Meta-framework Astro
Analytics & Marketing
Analytics Microsoft Clarity
SEO Google Search Console

Infrastructure

Network
CLOUDFLARENET - Cloudflare, Inc., US
AS13335 · US
DNS
Cloudflare DNS
Authoritative nameserver
DNSSEC
Enabled
DNSKEY records published. DNS responses signed.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Google Trust Services
Valid 7 Jun 2026 to 5 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
2 months
Registered Jun 2026 · Cloudflare, Inc.

Email Security

✗
SPF Not published. Your domain can be spoofed in phishing emails.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC Not published. Receivers fall back to permissive defaults.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

✓ Custom title and meta description
✓ Open Graph tags (title, image, description)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
⚠
Page title is 69 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.
⚠
Meta description is 191 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

Performance How?

116 ms Server response
81% Faster than peers
340 ms Largest contentful paint
0.00 Cumulative layout shift
45 KB Page weight
3 Third-party domains
0 Console errors
0 Failed requests

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

AI Stance

Welcomes AI crawlers
✓ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
✓ ai-train = yes
✓ search = yes
✓ ai-input = yes
Link headers
✓ sitemap
✓ api-catalog
✓ service-desc

Well-Known Files

✓ robots.txt
✓ sitemap.xml (16 URLs)
✗ security.txt
✓ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy/
? Terms of Service not detected
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).
94% unique
Mentions:
Cookies Do Not Sell

Security Headers (4/6)

✓
Referrer-Policy
✓
X-Frame-Options
✓
Permissions-Policy experimental (check browser support)
✓
X-Content-Type-Options
✗
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

✓ Code splitting
4 JS files
1 CSS files
3 Third-party domains

Brand Colours

App Manifest

Simple Online Ruler
display: standalone 3 icons
theme #ffffff
utilities productivity education
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.