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gem.app

https://gem.app· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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gem.app
Desktop screenshot of gem.app
Mobile screenshot of gem.app
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

3.164.206.60

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

CDN

CloudFront

Nameservers

ns-978.awsdns-58.net.ns-1148.awsdns-15.org.ns-1575.awsdns-04.co.uk.ns-4.awsdns-00.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
523 ms10%
Speed Index
680 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
438 KB
34 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Technology Stack

3 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

CSS Frameworks

1
Tailwind CSS

SEO Analysis

C68/100
16
8
1
Meta Tags12/15
Content8/12
Headings3/8
Technical19/21
E-E-A-T2/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile3/4
Indexability3/3
G
gem.appgem.app

Gem • Find Secondhand Clothing Online

Gem • Search millions of products from thousands of online stores at once, to find the used clothing item you are looking for.

Title Length37 chars

Recommended: 50-60 chars (~226px / 580px)

Description Length126 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Local SEO

Local Search Readiness

22/100
Needs Work
6 14

Sponsored

AI & LLM Readiness

D46/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
3/25
Citation
10/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:2%
Words:1,168
Token eff.:Optimal
Sections/1K:5.1
Depth:1/5

Structured Data

1 JSON-LD
Organization×1.1
sameAs entity links

Citation Readiness

Opening Summary
Descriptive Headingsavg 2.6w
Canonical URL
Open Graph1/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
83/100
12
Passed
1
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
87/100
A
44 mg
CO₂e / view
438.4 KB
Page Weight
90%
Cleaner Than
New Visitor
51 mg
vs
Returning (cached)
25 mg
Annual (10K/mo)
5.3 kg
Emission Segments
Data Center
2 mg
Network
13 mg
Device
29 mg
Resource Breakdown
JavaScript
408.2 KB
Images
1.9 KB
HTML
28.3 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
1 recommendation
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

87%Very Good
Interactive

HTTPS

No WAF

269d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

27.12.2025

Valid Until

24.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (6)

gem.app*.prod.gem.appbackend.gem.app*.dev.gem.appimages.gem.app*.stage.gem.app

SHA-256 Fingerprint

49:DD:52:A5:5D:D0:35:8C:DF:10:BB:5A:22:2A:8C:AC:97:07:A1:8C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟡 1s(s-maxage=900, max-age=1)
content-encoding
📦 Gzip(gzip)
content-security-policy
default-src 'self';style-src 'self' 'unsafe-inline';script-s...
content-type
text/html; charset=utf-8
cross-origin-opener-policy
same-origin
cross-origin-resource-policy
same-origin
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

spool.mail.gandi.net
fb.mail.gandi.net

Domain Information

gem.app

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
B
73/100
Mobile Friendly31 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica Neue

WCAG Partial
75/100
Readability
/30
20/30

16px · LH 1.15

Hierarchy
/20
18/20

2x ratio · ✓ H1→H6

WCAG
/25
15/25

1.36:1 min contrast

Performance
/25
22/25

System fonts

Heading Font

Helvetica Neue

Sans32px

Body Font

Helvetica Neue

Sans16px

Contrast Ratio

1.36:1

5 issues

Reading Comfort

Single Font Family

left aligned
32px
h1
40px
h2
30px
h3
Minor Second
Scale

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Tight line spacing (1.15). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.4:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

Fluid Type

Color Palette

9 unique colors
Light
#dbdadd
Other· 35.3%
#3e3036
Primary· 7.6%
#120c0f
Secondary· 7.2%
#7f373a
Secondary· 5.8%
#20292e
Secondary· 5.5%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Social Media

1
Pinterest WidgetsFree

Social widgets and sharing tools

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

3 Resources

3
Scripts
0
Styles
3
Async
0
Defer

Top Script Sources

local(2)googletagmanager.com(1)

Website Identity

Gem

Gem

Organization

Gem is a search engine for online vintage and secondhand clothing and accessories.

contact@gem.app

3811 Ditmars Blvd #2108, Astoria

11105, Astoria

The United States

Location detected: 🇫🇮 Finlandvia ip
en

Sponsored

Last analyzed: 30 Apr 2026 at 13:32

Historical Analysis & Change Tracking