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Simpluna

An app for recording your period and checking the next predicted date. No ads and no account registration.

Health
Japan Estimated origin: Japan

Added August 5, 2026 · Last analysed August 5, 2026 · via Hacker News

Own this Launch?
Screenshot of Simpluna

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 5 August 2026; the live site may have changed since.

Simpluna is largely in shape, with complete legal pages, a thorough launch checklist, and fast page loads. What needs work: missing several security headers and no email security records.

Launched on Hacker News on August 5, 2026. The site is hosted on OpenNext and served through Cloudflare, with a domain registered in 2020. The crawl picked up 11 technologies on this site, covering analytics, CDN, DNS providers, and web fonts. The stack includes Next.js, React, and Adobe Fonts.

For context, it's running the same core stack as 112 other launches.

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

7.7
StackScope Score
Good
88/100 Launch Readiness
Launch ready
2/6 Security Headers
Weak
3/3 Legal
Complete
2/2 Crawl files
Complete
85/100 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 (11)

Infrastructure
CDN Cloudflare (2)
DNS Cloudflare DNS
Hosting OpenNext
Protocol HTTP/3
Security HSTS
Build & Framework
Font Adobe Fonts (2)
Framework React
Meta-framework Next.js (4)
Mobile Apple App Store
Package CDN cdnjs
Analytics & Marketing
Analytics Cloudflare Web Analytics (2)

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 21 Jul 2026 to 19 Oct 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
6 years
Registered Aug 2020 · Squarespace Domains II LLC.

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 (partial) missing custom <title>
✓ Open Graph tags (title, image, description)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)

Performance How?

141 ms Server response
82% Faster than peers
908 ms Largest contentful paint
0.17 Cumulative layout shift
1.1 MB Page weight
84 KB Image weight
6 Third-party domains
0 Console errors
0 Failed requests

⚠ 10 images: 7 oversized, 10 without width/height, 1 missing alt text

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

AI Stance

Blocks AI crawlers but publishes an llms.txt
✓ llms.txt published
✗ 9 AI bots blocked in robots.txt
Content-Signal
✗ ai-train = no
✓ search = yes
? ai-input (not declared)
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (107 URLs)
✗ security.txt
✓ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/en/privacy-policy
✓ Terms of Service
/en/terms-and-conditions
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).
92% unique
Mentions:
GDPR

Security Headers (2/6)

✗
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
12 JS files
2 CSS files
6 Third-party domains

Brand Colours

App Manifest

Simpluna: Period Tracker
display: minimal-ui 8 icons
theme #AA82C8
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.