isotunes.de website review

17 files are served with short cache lifetimes, so returning visitors download them again (732 KiB).

About 504 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 1.3 s faster on a phone.

Your mobile performance score is 50. Pages that score under 90 lose visitors before the first paint.

8 third-party services load with your homepage (Hotjar, Facebook and Shopify and others), adding 947 KiB and 610 ms of main-thread time.

10 images could be 387 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

Polyfills for old browsers add 31 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 300 ms faster on a phone.

A phone's processor spends 3.2 s on main-thread work while loading, 1.5 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

The page has 2,254 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

Shopify costs a phone 99 ms of main-thread work and 296 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

About 42 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 270 ms faster on a phone.

7 long tasks block the main thread while loading, the longest for 230 ms. During a long task the page ignores taps.

3 files block the first paint until they finish downloading. Deferring or inlining them could save about 100 ms.

Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 50 ms).

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

Your largest element takes 16.8 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “ISOtunes Earbuds Homepage”.

The page becomes fully interactive after 17.2 s. Good is under 3.8 s.

Visually, the page fills in at 7.0 s (Speed Index). Good is under 3.4 s.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 134 ms to 196 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Real visitors see the first content after 2.7 s (75th percentile). Good is under 1.8 s.

The first text or image appears after 3.0 s on a phone. Good is under 1.8 s.

Scripts block taps and scrolling for 548 ms in total while the page loads. Good is under 200 ms.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 2.1 s to 2.2 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 4.0 MB in 240 requests on a phone: scripts 1.5 MB (76), images 1.4 MB (36) and other files 842 KiB (111). Under 2 MB keeps phones on slow connections fast.

2 images further down the page (41 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 1.12 g of CO₂e: 134.5 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

2 dropdowns have no label.

9 elements hidden from screen readers can still receive keyboard focus.

3 tap targets are too small or too close together to hit reliably with a finger.

2 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

Scrollable region must have keyboard access: 1 element on the page fails this check, rated serious by axe-core.

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination: 1 element on the page fails this check, rated moderate by axe-core.

The viewport tag blocks pinch-zoom, which low-vision visitors rely on.

All page content should be contained by landmarks: 1 element on the page fails this check, rated moderate by axe-core.

2 form fields have no label, so screen readers announce an empty box and autofill guesses.

No Open Graph image, so links shared on LinkedIn, Slack or Facebook show no preview picture.

The homepage links to 184 pages on isotunes.de and 2 external pages.

Your Organization JSON-LD is missing sameAs (social profiles), description and contact details. These are the facts AI assistants use to describe a business and to tell it apart from others with a similar name.

https://isotunes.eu/de-de/products/defy-slim-basic and https://isotunes.eu/de-de/products/slim-passive all use the title “ISOtunes Sport DEFY Slim Basic Kapsel-Gehörschutz | Gehörschutz”. Search engines can't tell which page to show for a search, so each competes with the others.

https://isotunes.eu/de-de/products/defy-slim-basic and https://isotunes.eu/de-de/products/slim-passive use the same meta description. A description written for each page earns more clicks.

Your homepage links to 1 page by a URL that isn't its canonical one, for example https://isotunes.eu/de-de/products/isotunes-link-aware-en352, whose canonical is https://isotunes.eu/de-de/products/link-aware. Linking straight to the canonical URL saves crawlers a detour and keeps ranking signals on one address.

https://isotunes.eu/de-de/pages/black-friday has no <h1> headline, so visitors and search engines get no clear main topic.

https://isotunes.eu/de-de/products/isotunes-link-aware-en352 took over 3 s to send its HTML from our server.

We fetched 15 pages linked from your homepage (of 61 found) and read each the way a search engine does.

40 of 58 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

5 errors were logged to the browser console while the page loaded, for example “Cannot read properties of null (reading 'style')”.

1 image is displayed at the wrong aspect ratio, so it looks stretched or squashed.

Large scripts ship without source maps.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 647 words of visible text.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Hotjar and Klaviyo and 1 more (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 23 cookies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 32 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.