Yellow OS

Web OS made in 2 weeks

Developer Tools

Added April 13, 2026 · Last analysed April 13, 2026 · via · 71% unique tagline

Own this Launch?

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 13 April 2026; the live site may have changed since.

Yellow OS still has work before launch. What needs work: missing several security headers, incomplete legal pages, and no robots.txt or sitemap.

Launched on Product Hunt on April 2, 2026. The domain was registered 2 weeks before launch. The crawl picked up 4 technologies on this site, covering DNS providers, web fonts, protocol, and servers. The stack includes Forpsi DNS, Google Fonts, and HTTP/3.

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

1.2

StackScope Score

Poor

41/100 Launch Readiness

Partially ready

0/6 Security Headers

Poor

0/3 Legal

Missing

0/2 Crawl files

Missing

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 (4)

Infrastructure

DNS	Forpsi DNS
Protocol	HTTP/3 (2)
Server	nginx (2)

Build & Framework

Font	Google Fonts

Infrastructure

DNS

Forpsi DNS

Authoritative nameserver

DNSSEC

Enabled

DNSKEY records published. DNS responses signed.

SSL Certificate

Let's Encrypt

Valid 17 Mar 2026 to 15 Jun 2026

Certificate as captured in this snapshot, not a live check.

Domain Age

4 months

Registered Mar 2026 · Tucows Domains 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.

Readiness Breakdown How?

⚠

Custom title and meta description (partial) missing meta description

✓ Responsive viewport meta tag

✓ Favicon present

- Open Graph tags (title, image, description)

- Canonical URL declared

- Twitter card meta tags

- Semantic HTML (nav, main, article)

AI Stance

No AI stance declared

✗ llms.txt published

✓ No AI bots blocked in robots.txt

Content-Signal

? No directive declared

Link headers

? None advertised

Well-Known Files

✗ robots.txt

✗ sitemap.xml

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

? Privacy Policy not detected

? Terms of Service not detected

Detection works best on English language sites.

Security Headers (0/6)

✗

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)

Performance

156ms response time

Faster than 80% of sites

3 third-party domains loaded

Build

0 JS files

3 CSS files

3 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.