Introducing Rhino

Master glance readability with the first automated clarity and contrast tester designed specifically for mobile screens.

Transforming Ideas into a brighter digital future.

Built to meet the demands of the digital shelf and the shopper truth that “online shoppers don’t read; they glance. Rhino applies three contrast testing methodologies – WCAG 2.2 Contrast Ratio, APCA and BridgePCA – alongside Cambridge University visual clarity algorithms to validate whether mobile-ready hero images are GS1 compliant, and PDP gallery secondary images, as well as retailer media adverts, are truly glance-readable on mobile. It enables teams to assess, optimise and scale image performance across large catalogues with speed, precision and consistency.

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Why glance readability matters more than ever

Glance readability is no longer a design preference – it is a business-critical requirement in modern visual commerce.

Eyesight is declining globally, with ageing populations struggling to read small details, while increased screen time is accelerating myopia in younger consumers. At the same time, more than three-quarters of shopping now happens on mobile – where product images are reduced to a ~20 mm image thumbnail

Generative AI is rapidly increasing content volume, but without quality control, brands risk flooding the digital shelf with noise instead of clarity. In this environment, content must be instantly understood “at a glance” – or it is ignored.

Glance readability ensures visual content is clear, accessible and actionable in real-world conditions – helping shoppers quickly recognise, understand and decide.

RHINO works as a standalone web-based tester that integrates seamlessly with Digital Asset Management platforms, PIM systems, Creative Automation workflows and Retailer Content Repositories via API

Only RHINO measures glance-readability of text on images – no other tool has a three-dimensional model that incorporates contrast, text size, stroke width and the differences in legibility of CAPS, lowercase and numerals

Five core capabilities of Rhino that enhances glance readability

As digital commerce becomes increasingly screen-first, ensuring content is readable, accessible and optimised for mobile is critical. Rhino is purpose-built to validate mobile-ready hero images using APCA contrast and Cambridge visual clarity standards.

It enables brands to test, optimise and scale image performance across the digital shelf, ensuring content is glance-readable, compliant and designed for real-world mobile viewing.

Bulk Testing

Test thousands of mobile-ready hero images with automated speed. Upload assets in bulk, run multiple tests and get consistent results at scale helping teams reduce manual effort and validate content faster.

Three Contrast Tests

Apply WCAG 2.2 Contrast Ratio, APCA and BridgePCA contrast tests to evaluate colour contrast from complementary perspectives and improve readability across mobile content.

CamCAST – Visual Clarity

Use CamCAST – the Cambridge clarity tests to readability on small screens. Assess how easily text and key visual information can be understood in real-world mobile viewing conditions, beyond contrast alone.

Compliance

Meet WCAG 2.2 and emerging WCAG 3 requirements with automated contrast and clarity validation. Identify potential accessibility issues earlier and give teams a consistent way to assess content before it reaches the digital shelf.

Glance Readability

Ensure critical text is instantly understood across mobile screens. RHINO assesses the factors that influence readability at a glance, helping teams create clearer, more accessible and effective visual content.

“Digital commerce is transforming, and it’s imperative to stay ahead of these shifts by shaping the future by integrating technology, online shopper insight with innovation to deliver more rewarding or lower friction experiences.”

Oliver Bradley – Digital Commerce Director

Superior Colour Contrast

Why APCA is a superior contrast standard test to improve glance readability

Transforming Ideas into a brighter digital future.

one.

Perceptual Accuracy

APCA models how users actually perceive contrast on screens, rather than relying on static ratios like WCAG 2. This enables more accurate readability predictions across real-world mobile environments.

By aligning with human vision, it ensures mobile-ready hero images and digital content remain clear, legible and effective, even under varying lighting conditions and screen qualities.

two.

Contextual Adaptation

APCA evaluates contrast dynamically based on font size, weight and background context. This allows more precise requirements for small text and greater flexibility for larger elements.

The result is improved legibility across mobile-ready hero images and digital interfaces, ensuring content performs consistently across devices, formats and user conditions.

three.

Range Uniformity

APCA delivers perceptually consistent contrast values across colour ranges. Unlike WCAG 2, which can misrepresent contrast in dark or light modes, APCA WCAG 3 ensures more reliable outcomes.

This consistency improves readability across digital commerce environments, helping brands maintain clarity and performance across platforms, screens and viewing contexts.

four.

Improved Accessibility

APCA WCAG 3 improves contrast accuracy, enhancing readability for users with visual and age-related challenges.

With the European Accessibility Act (EAA) and EN 301 549 defining compliance, content must meet strict standards – including minimum contrast and minimum text sizes for non-zoomable visuals – ensuring accessible, legible digital experiences across devices.

five.

Design Flexibility

APCA enables designers to work with a broader, more practical colour palette while maintaining accessibility and readability standards across digital platforms.

It supports modern design systems and mobile-first experiences, allowing creative freedom without compromising the performance or effectiveness of content on screen.

six.

Scientific Research

APCA is grounded in peer-reviewed research on visual perception, contrast sensitivity and how users interact with digital screens in real-world conditions.

This scientific approach ensures more reliable and accurate contrast evaluation, helping brands create mobile ready hero images that are clear, compliant and optimised for performance.

Ready to improve glance readability?

Get expert guidance on contrast, clarity and mobile ready hero images. Discover how Rhino helps you create accessible, high-performing digital content.

“The Rhino tool helps teams transform visual chaos into structure, accessible imagery by giving clear, scientific insight into glance-readability”

Dr Sam Waller – Cambridge University

Missed conversion

Shoppers make decisions in seconds on mobile. If product images are not instantly clear, key information is lost at the first glance, reducing engagement and conversion. Poor glance-readability directly impacts add-to-basket rates, as unclear mobile ready hero images fail to communicate value, size, or differentiation quickly enough.

Clarity drives faster decisions and higher conversion.

Reduced shelf visibility

Retail algorithms prioritise content that performs. Images that lack clarity or contrast are less likely to drive engagement, impacting rankings across the digital shelf. Without mobile-ready, readable imagery, brands risk losing visibility, even when products are competitively priced or well-positioned. Unreadable is unsellable, unseen is unsold.

Better visibility starts with better-performing content.

Compliance risk

As accessibility standards evolve towards WCAG 3.0, contrast and readability are no longer optional. Poorly designed images can exclude users with visual impairments or ageing eyesight. Failure to meet accessibility expectations can lead to compliance risks, reduced reach, and missed opportunities to engage a broader audience.

Accessible content expands reach and reduces risk.

Inconsistent Perception

Inconsistent readability across images creates fragmented brand experiences. When content is not optimised for screens, it signals a lack of quality and attention to detail. Mobile ready hero images and PDP gallery secondary images that are clear, accessible and consistent help reinforce trust, strengthen brand perception, and improve overall digital experience.

Consistency builds trust across every screen.

Losing impact on the digital shelf?

Fix clarity, contrast, mobile ready hero images and your PDP Gallery secondary images to improve visibility, accessibility and conversion across every screen.

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Why Choose Rhino?

RHINO is purpose-built for mobile-first environments, combining WCAG 2.2 Contrast Ratio, APCA and BridgePCA contrast testing with CamCAST – Cambridge visual clarity and automated testing to ensure mobile-ready hero images are clear, accessible and high-performing across the digital shelf.

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Built for mobile-first performance

Unlike traditional tools built for desktop standards, Rhino is engineered for mobile environments where glance readability defines performance.

It ensures hero images communicate clearly, instantly and effectively across small screens, where most purchase decisions now happen globally.

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Science-led, not assumption-led

Rhino is built on real testing of how people read content, using controlled variables across font sizes, weights, contrast levels and formats.

This scientific approach ensures content is optimised for real-world readability, not assumptions, across devices, lighting conditions and behaviour.

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Automation designed for scale

Rhino enables bulk testing across thousands of images, helping teams validate contrast, clarity and accessibility with speed and precision.

This reduces manual effort, improves consistency, and ensures every asset meets digital shelf, accessibility and performance standards globally.

Want to know more about glance readability with Rhino?
Here are some FAQs to help you optimise glance readability for mobile-first environments.

Rhino is an automated visual accessibility testing tool designed specifically for digital commerce. It evaluates visuals both mobile-ready hero images, PDP Gallery secondary images and retailer media adverts and social media posts using APCA contrast standards and Cambridge Visual Clarity models to ensuring strong glance readability, accessibility and optimisation for small screens. This helps brands improve digital shelf performance, visibility and conversion rates.

RHINO combines three contrast testing methodologies – WCAG 2.2 Contrast Ratio, APCA and BridgePCA – with CamCAST, the Cambridge University visual clarity test principles to assess how content performs on mobile devices. This allows brands to evaluate contrast, text legibility and visual clarity from multiple perspectives, helping ensure text, product information and key visuals remain glance-readable on small screens.

Mobile ready hero images are critical because most online shopping happens on mobile devices. If product images are not clear, readable and accessible, brands risk losing visibility and conversions. Rhino ensures images communicate key information instantly, improving customer experience and performance across the digital shelf.

Glance readability improves conversion by ensuring shoppers can instantly understand product information on mobile. When visuals are clear and readable, it reduces friction, builds trust, and increases engagement and add-to-basket rates.