LessonLog
Free AI-powered teacher app. Record voice notes in class, track attendance, and generate professional student reports in one click.
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 React and Supabase, the site is hosted on Vercel and served through Cloudflare, with a domain registered 10 months before launch.
- It blocks 12 AI crawlers in its robots.txt.
Built with: 20 technologies · Indie stack
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For light pages
<a href="https://firstsited.com/launch/v2rjwbow/lessonlog"><img src="https://firstsited.com/badge/v2rjwbow/stack.svg" alt="LessonLog tech stack on FirstSited" height="28"></a>
For dark pages
<a href="https://firstsited.com/launch/v2rjwbow/lessonlog"><img src="https://firstsited.com/badge/v2rjwbow/stack.svg?theme=dark" alt="LessonLog tech stack on FirstSited" height="28"></a>
How it fits together
Each technology runs on, or extends, the one it sits under.
| Technology | Type |
|---|---|
| Infrastructure | |
Cloudflare
|
CDN |
Cloudflare DNS
|
DNS |
Vercel
|
Hosting |
| HTTP/3 | Protocol |
| HSTS | Security |
Cloudflare Email Routing
(2)
|
Email forwarding |
MailerSend
|
Transactional email |
Resend
|
Transactional email |
| Build & Framework | |
Supabase
(2)
|
BaaS |
Tailwind CSS
|
CSS framework |
Vite
|
Developer tools |
Google Fonts
|
Font |
React
|
Framework |
i18next
|
JavaScript library |
jsPDF
|
JavaScript library |
PDFKit
|
JavaScript library |
React Router
|
JavaScript library |
Lucide Icons
|
UI library |
| Analytics & Marketing | |
Google Search Console
|
SEO |
| Business Tools | |
Sentry
(2)
|
Error tracking |
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) | |
| Meta description is 173 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 /privacy | |
| Terms of service /terms |
Mentions: GDPR, Cookies, Do Not Sell
| robots.txt | |
| sitemap.xml 14 URLs | |
| security.txt optional | |
| llms.txt optional | |
| ads.txt only for ad-funded sites | |
| humans.txt optional |
| llms.txt published not published | |
| 12 AI bots blocked in robots.txt the owner's choice | |
| Content-Signal ai-train = no | |
| Content-Signal search = yes | |
| Content-Signal ai-input not declared | |
| Link headers none advertised |
| State | Record | Status |
|---|---|---|
| SPF ~all | Soft-fail (~all), common and accepted | |
| DMARC | Not published | |
| DKIM | Found | |
| 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 23 Sep 2026 to 22 Dec 2026, as captured |
| Domain age | 10 months registered Dec 2025, Name.com, Inc. |
| Green hosting | Yes per The Green Web Foundation |
| Page build | 1 JS file, 2 CSS files 4 third-party domains |
| App manifest | LessonLog display standalone; 4 icons |
| Brand colours |
Storage: 4 items
| Key | Size | Set by |
|---|---|---|
| i18nextLng | 2 B | i18next |
| Key | Size | Set by |
|---|---|---|
| ll_initial_landing | 1 B | - |
| ll_initial_referrer | 0 B | - |
| sentryReplaySession | 141 B | Sentry |
Performance
| Measure | This site | Reading |
|---|---|---|
| Server response | 368 ms | good, faster than 39% of sites |
| Largest contentful paint | 616 ms | good |
| Layout shift | 0.02 | good |
| Page weight | 1.2 MB | fair |
| Image weight | 125 KB | light |
| Images | 3 | 3 larger than shown, 3 without width and height |
| Third-party domains | 4 | |
| 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 AI copy signals +5 AI onboarding signals +5 AI palette signals +5 AI writing signals +5 - 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.