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Avion Calc

The ultimate aviation calculator for multi-leg flight time logging and duty period tracking. Support for HH:MM and Decimal formats with fully customizable report and debrief settings.

Added April 29, 2026 · Last analysed April 29, 2026 · via · 71% unique tagline

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 29 April 2026; the live site may have changed since.

Avion Calc has the basics covered well, with complete legal pages, a thorough launch checklist, and clean crawl signals. Main gaps: missing several security headers, tracking cookies set before any opt-in, and incomplete email security.

Launched on Product Hunt on April 29, 2026. The site is served through Fastly, with a domain registered in 2012. Our crawler found 11 technologies on this site, covering analytics, baas, CDN, and CSS frameworks. The stack includes Next.js, React, and Tailwind CSS.

It's also on one of the most common stacks we track, shared by 3,880 launches.

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

7.3
StackScope Score
Good
90/100 Launch Readiness
Launch ready
3/3* Legal
Complete*
2/2 Crawl files
Complete
Vibe Score 10 · Few 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 (11)

Infrastructure
CDN Fastly (2)
DNS GoDaddy DNS
Protocol HTTP/3 (2)
Security HSTS (2)
Email
Business email Google Workspace (3)
Build & Framework
BaaS Firebase
CSS framework Tailwind CSS
Framework React
Meta-framework Next.js (2)
Analytics & Marketing
Analytics Google Analytics (3)
SEO Google Search Console

Infrastructure

Network
AS54113 · US
DNS
GoDaddy DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
SSL Certificate
Google Trust Services
Valid 9 Apr 2026 to 8 Jul 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
13.7 years
Registered Nov 2012 · GoDaddy.com, LLC

Email Security

SPF ~all Soft-fail (~all). Common and accepted.
DKIM Detected via known email provider
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 (4)

Cookies (2)
NameLifetimeDetected as
_ga 1y Google Analytics
_ga_HB9NEQKEE4 1y Google Analytics
IndexedDB (2)
DatabaseVersionDetected as
firebase-heartbeat-database 1 Firebase
firebase-installations-database 1 Firebase

Readiness Breakdown How?

Custom title and meta description
Open Graph tags (title, image, description) (partial) missing og:image
Twitter card meta tags
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Page title is 63 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 183 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.

Vibe Score Breakdown How?

SignalPoints
Placeholder branding +10

This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.

AI Stance

No AI stance declared
llms.txt published
No AI bots blocked in robots.txt
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (22 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/apps/avion/flight-time-calculator/privacy
Terms of Service
/apps/avion/flight-time-calculator/terms
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
96% unique

Security Headers (1/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Performance

164ms response time
Faster than 78% of sites
2 third-party domains loaded

Build

Code splitting
11 JS files
1 CSS files
2 Third-party domains

Brand Colours

App Manifest

Uwemo Applications
display: standalone 2 icons
theme #ffffff
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.