yonbo.ai website review

About 1.2 MB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 3.0 s faster on a phone.

Your mobile performance score is 41. Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

A phone's processor spends 4.8 s on main-thread work while loading, 2.2 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (YouTube, Google Tag Manager and quickcep.com and others), adding 2.5 MB and 1.4 s of main-thread time.

About 260 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 440 ms faster on a phone.

YouTube costs a phone 572 ms of main-thread work and 986 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.

7 files block the first paint until they finish downloading. Deferring or inlining them could save about 450 ms.

10 files are served with short cache lifetimes, so returning visitors download them again (440 KiB).

Google Tag Manager costs a phone 250 ms of main-thread work and 364 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.

quickcep.com costs a phone 223 ms of main-thread work and 561 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.

Shopify costs a phone 205 ms of main-thread work and 449 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.

12 long tasks block the main thread while loading, the longest for 195 ms. During a long task the page ignores taps.

6 images could be 120 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

21 KiB could be saved by minifying CSS.

Polyfills for old browsers add 19 KiB JavaScript that modern phones do not need.

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.

The first text or image appears after 8.0 s on a phone. Good is under 1.8 s.

The page becomes fully interactive after 26.1 s. Good is under 3.8 s.

Your largest element takes 8.0 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “By Child Psychologist ｜Immersive Learning ｜Advanced Parenta…”.

Visually, the page fills in at 10.4 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 613 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' tap response (inp) went from 253 ms to 247 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 1.6 s to 1.5 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 49.7 MB in 298 requests on a phone: media 45.2 MB (12), scripts 2.6 MB (73) and other files 867 KiB (160). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 14.09 g of CO₂e: 1690.8 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

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

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

Scrollable region must have keyboard access: 3 elements on the page fail this check, rated serious by axe-core.

1 frame has no title, so screen-reader users cannot tell what it contains.

12 images have no alt text, which hurts accessibility and image search.

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

1 form field has no label, so screen readers announce an empty box and autofill guesses.

There are 2 <h1> headlines (“YONBO” and “Sign up for new stories and personal offers”). One clear main headline is easier for people and search engines.

The homepage links to 29 pages on yonbo.ai and 24 external pages.

https://yonbo.ai/pages/app, https://yonbo.ai/pages/support, https://yonbo.ai/pages/our-story and https://yonbo.ai/pages/faq have no meta description, so Google writes the search snippet from whatever text it finds.

https://yonbo.ai/pages/contact-us and https://yonbo.ai/pages/changelog have under 150 words in the HTML. Thin pages rarely rank; if the text loads with JavaScript, crawlers that don't run it see even less.

We fetched 13 pages linked from your homepage and read each the way a search engine does.

1 image failed to load on a phone, for example https://bat.bing.com/action/0?ti=97214018&tm=gtm002&Ver=2&mid=90f164d8-5504-460c-9fa1-ec885d76e3a6&bo=1&sid=24b02220d98111f18b04d91578b3865d&vid=24b01690d98111f1865a0303a2458d07&vids=1&msclkid=N&gtm_t.

5 third-party cookies are set on load; browsers are restricting these, so whatever relies on them breaks.

3 of 6 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 “Failed to load resource: net::ERR_FAILED”.

2 images are served at too low a resolution for sharp phone screens.

Chrome logged issues while loading the page (“Cookie”).

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

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 346 words of visible text.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Klaviyo and Microsoft Ads 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 8 cookies, 1 of them by other companies (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 25 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.