AirCalendar
AirCalendar is a native Mac menu bar calendar with Strict Read-Only Apple Calendar Sync, 2-Way macOS Reminders Sync, Chinese lunar dates, 24 solar terms and holidays. Free core features; Pro adds weather and widgets with a 1-month free trial or $1.99 one-time Lifetime Unlock (or $0.99/month).
Added 11 Nov 2026
Analysed 11 Nov 2026
via 
What we found
- It sends two of the six security headers we check; Content-Security-Policy is among those missing.
- It publishes SPF but no DMARC record, so receivers decide for themselves what to do with email that fails.
- Built with Astro, the site is served through Cloudflare.
- It welcomes AI crawlers and publishes an llms.txt.
Built with: 8 technologies
Embed this on your site
For light pages
<a href="https://firstsited.com/launch/n0d6wcip/aircalendar"><img src="https://firstsited.com/badge/n0d6wcip/stack.svg" alt="AirCalendar tech stack on FirstSited" height="28"></a>
For dark pages
<a href="https://firstsited.com/launch/n0d6wcip/aircalendar"><img src="https://firstsited.com/badge/n0d6wcip/stack.svg?theme=dark" alt="AirCalendar tech stack on FirstSited" height="28"></a>
| Technology | Type |
|---|---|
| Infrastructure | |
Cloudflare
|
CDN |
Cloudflare DNS
|
DNS |
| HTTP/3 | Protocol |
Cloudflare Email Routing
(2)
|
Email forwarding |
| Build & Framework | |
Astro
|
Meta-framework |
| Analytics & Marketing | |
Google Search Console
|
SEO |
| Other | |
MacPip
|
Directory |
SpacerrApps
|
Directory |
Each technology links to its own page: which other new sites launched with it.
Site checks
| 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 82 characters 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 293 characters Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear. |
| Referrer-Policy | |
| X-Frame-Options | |
| Permissions-Policy experimental | |
| X-Content-Type-Options | |
| Content-Security-Policy | |
| Strict-Transport-Security | |
| X-XSS-Protection deprecated, not counted |
| Privacy policy /apps/aircalendar/privacy/ | |
| Terms of service /guides/aircalendar/lunar-calendar/ |
| robots.txt | |
| sitemap.xml 187 URLs | |
| security.txt optional | |
| llms.txt | |
| ads.txt only for ad-funded sites | |
| humans.txt optional |
| llms.txt published | |
| No AI bots blocked in robots.txt | |
| Content-Signal none declared | |
| Link headers none advertised |
| State | Record | Status |
|---|---|---|
| SPF ~all | Soft-fail (~all), common and accepted | |
| DMARC | Not published | |
| DKIM | Not found at common selectors | |
| MTA-STS | Not deployed | |
| TLS-RPT | Not configured |
Without DMARC, receivers fall back to their own rules for email that fails SPF.
Hosting and network
| Network | CLOUDFLARENET - Cloudflare, Inc., US AS13335, US |
|---|---|
| DNS | Cloudflare DNS authoritative nameservers |
| DNSSEC | Not enabled DNS answers are unsigned |
| Certificate | Google Trust Services valid 9 Oct 2026 to 7 Jan 2027, as captured |
| Green hosting | Yes per The Green Web Foundation |
| Page build | 2 JS files, 3 CSS files 3 third-party domains |
| Brand colours |
Storage: 0 items
Nothing stored in the browser on page load.
Performance
| Measure | This site | Reading |
|---|---|---|
| Server response | 224 ms | good, faster than 58% of sites |
| Largest contentful paint | 700 ms | good |
| Layout shift | 0.00 | good |
| Page weight | 1.2 MB | fair |
| Image weight | 861 KB | fair |
| Images | 53 | 8 larger than shown, 7 without width and height, 40 without alt text |
| Third-party domains | 3 | |
| Console errors | 0 | none |
| Failed requests | 0 | none |
From a single automated render of the home page. A quick guide, not a substitute for Lighthouse or field data. How we measure
Notes
-
Looks AI-built: few AI signals.
How much the site looks AI-generated. It is a pattern match shown for interest, not a verdict.
Which signals fired
Signal Points Placeholder branding +10 AI palette signals +5 AI writing signals +3 - Performance comes from one render on 11 November 2026 and will vary between visits.
How we know
FirstSited records what new websites are built with, usually within a day of going live. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We checked this one in full: its tech stack, DNS, security headers and page basics. This page is what we saw on 11 November 2026; the live site may have changed since.
Every technology below links to its own page: which other new sites launched with it. Watch any of them and get every new site that uses it as it goes live, from £15 a month.