What is mobile accessibility testing?

Mobile accessibility testing checks whether people with disabilities can use your Android and iOS app, including people who rely on TalkBack, VoiceOver, larger text, or switch controls. It measures the app against WCAG success criteria and the laws that reference them, such as the ADA and Section 508.

Is mobile accessibility testing required by law?

In many markets, yes. The US Department of Justice ADA Title II rule names WCAG 2.1 Level AA as the standard for state and local government mobile apps, and the European Accessibility Act has applied since 28 June 2025 to services such as banking, e-commerce, e-books, and passenger transport. Apps show EAA conformance against EN 301 549, the European ICT accessibility standard that incorporates WCAG 2.1 Level AA, and in Ontario the AODA requires WCAG 2.0 Level AA for organizations with 50 or more employees. The W3C publishes guidance on applying WCAG 2 to native and hybrid mobile apps.

How do I test my mobile app for accessibility?

Start with a manual pass in the Native App Scanner: upload your build, open it on a real device, and scan each screen of your key flows. Then use native app accessibility automation so the same checks run on every build, and finish with a TalkBack or VoiceOver pass on the flows that matter most.

What should you look for in mobile accessibility testing tools?

Look for rules written for Android and iOS, real devices alongside emulators, TalkBack and VoiceOver support, WCAG 2.2 targeting, scans that run in CI, and reports that show the failing element and a fix. TestMu AI runs 18 baseline Android rules and 15 baseline iOS rules, plus 34 newer shared rules, on 10,000+ real devices.

Which assistive technologies should you test a mobile app with?

Start with the built-in screen readers, TalkBack on Android and VoiceOver on iOS. Then check switch input (Switch Access, Switch Control), voice input (Voice Access, Voice Control), magnification, and the system text size setting, including Dynamic Type on iOS. TestMu AI runs TalkBack and VoiceOver sessions on real devices.

Why use a testing tool if TalkBack and VoiceOver are free?

TalkBack and VoiceOver tell you how one screen sounds to one tester. An accessibility testing tool checks each screen you scan, on every build, for unlabeled controls, contrast failures, and small touch targets, maps each issue to a WCAG criterion, and keeps a scan history you can show in an audit. Use both: scans for coverage, screen readers for how the app sounds.

Can automated tools find every app accessibility issue?

No. Automated rules catch what a machine can verify, such as missing labels, low contrast, and small touch targets. Whether a label makes sense when read aloud, or whether focus moves in a logical order, still needs a person with a screen reader. That is why TestMu AI Accessibility Testing keeps manual scans, automated scans, and screen reader sessions in one dashboard.

What is the difference between Android and iOS accessibility testing?

Android apps are read by TalkBack and iOS apps by VoiceOver, and each platform exposes labels, roles, and text sizing through its own APIs. TestMu AI runs 18 baseline automated checks on Android and 15 on iOS, plus newer rules shared by both. The Android coverage checklist and iOS coverage checklist list every rule and what still needs a manual check.

Do I need to write code to test app accessibility?

No. The Native App Scanner works without code, and KaneAI lets you add an accessibility scan step to a mobile test by typing / while you author it. Teams with an Appium suite add one call, driver.executeScript("lambda-accessibility-scan"), after each screen.

Do I need to install anything on our devices?

No. Scans run on real Android and iOS devices in the TestMu AI cloud, so nothing goes on your company phones. Upload your app build, start a session, and the build installs on the cloud device for you.

Which frameworks support automated app accessibility testing?

Native app accessibility automation runs through Appium on real Android and iOS devices, the same setup used for app test automation. KaneAI covers teams that prefer natural-language tests. For web apps, the same engine works with Selenium, Playwright, and Cypress through Accessibility Automation.

Why run accessibility testing on mobile devices instead of emulators?

Screen reader output, touch target rendering, and font scaling on a real phone can differ from an emulator. App scans on TestMu AI run on the real device cloud, with 10,000+ real Android and iOS devices, so you test the hardware and OS versions your users carry.

How often should you run mobile accessibility tests?

Run automated scans on every build through Appium or KaneAI, so a regression shows up in the pull request that caused it. Add a manual TalkBack and VoiceOver pass before each release and after any major UI change, because rules cannot judge whether an announcement makes sense.

Can you test an app's accessibility before release?

Yes. Upload a pre-release Android or iOS build to the Native App Scanner, open it on a real device, and scan each screen. Appium and KaneAI scans run against the same build in your test pipeline, so issues are fixed before the app reaches the store.

Does TestMu AI provide a VPAT for my app?

No. A VPAT or Accessibility Conformance Report is a document your organization writes about its own product. TestMu AI gives you the evidence behind it: scan history, WCAG-mapped issues with severity, and exportable PDF and CSV reports.

Why is accessibility testing important for mobile apps?

The WHO estimates that 1.3 billion people, about 1 in 6, experience significant disability, and many of them use a phone for banking, shopping, and public services. An inaccessible app shuts those users out and creates legal exposure under laws such as the ADA.

Mobile Accessibility Testing on Real Devices

Test Android and iOS apps against WCAG 2.2, the ADA, Section 508, and the European Accessibility Act on 10,000+ real devices, with no-code scans, Appium checks, and screen readers.

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Mobile Accessibility Testing on Real Devices

Trusted by 3M+ users globally at

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Scan, Automate, and Verify App Accessibility

Mobile accessibility testing checks Android and iOS screens against WCAG, from labels and contrast to what TalkBack and VoiceOver read aloud.

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NATIVE APP SCANNER

No-Code Accessibility Scans on Real Devices

TestMu AI scans each screen of your Android or iOS build on a real device, so anyone on the team can audit a flow without code.

Scan Your App Free

Checks labels, roles, contrast, and touch targets
Tests Dynamic Type and font scaling on real hardware
Maps every issue to a WCAG criterion with a fix

Native App Scanner flagging accessibility issues on a real Android device

APPIUM & KANEAI

Accessibility Checks in Appium and KaneAI Tests

TestMu AI adds a scan to your Appium suite with one call, or to a KaneAI test with a / step, so every build reports issues.

Automate App Scans

Call lambda-accessibility-scan after any stable screen. Results appear in the Accessibility tab for that build.

Type / while authoring a KaneAI mobile test to add a scan step. The test is tagged accessibility-scan for filtering.

Pick a WCAG target, switch rule groups on or off, or hand-pick rules. Your choices are pre-filled on the next scan.

Tag scans by feature, sprint, or build to compare accessibility for one part of the app over time.

Automated accessibility scan results from an Appium run on real devices

SCREEN READERS

TalkBack and VoiceOver Testing on Real Phones

Turn on TalkBack or VoiceOver in a live session and swipe through your app as a screen reader user would, so your team catches unclear labels, wrong reading order, and missing announcements.

Test With Screen Readers

TalkBack on real Android phones and tablets
VoiceOver on real iPhones and iPads
Switch the screen reader on from the session panel

Screen reader session with VoiceOver on iOS and TalkBack on Android

MCP SERVER

Fix Accessibility Issues From Your AI Editor

The TestMu AI MCP Server brings accessibility reports into Claude Code, Cursor, and VS Code, so your team fixes issues next to the code.

Try the MCP Server

Connect with one command in Claude Code or Cursor
Ask for an accessibility report in plain English
Get fix guidance next to the code you are editing

Accessibility MCP Server returning a report inside an AI code editor

Android and iOS Accessibility Rule Coverage

TestMu AI runs rules written for Android and iOS on every app scan, each mapped to a WCAG criterion. The last rows cover what a person checks.

Android

iOS

Baseline automated rules

18 WCAG-mapped checks

15 WCAG-mapped checks

Recently added rules

34 new AI-enabled, best practice, and beta rules, shared with iOS

34 new AI-enabled, best practice, and beta rules, shared with Android

Labels and names

Missing field labels, unlabeled checkboxes and toggles, missing image alt

Missing labels on buttons, images, checkboxes, switches, and editable fields

Color contrast

Insufficient color ratio (WCAG 1.4.3)

Color contrast issues (WCAG 1.4.3)

Touch targets

Undersized touch targets and insufficient spacing (WCAG 2.5.5)

Touch target sizing (WCAG 2.5.5)

Roles and focus

Undefined interactive roles, inaccessible text focus, nested controls

Accessibility role definition, duplicate labels

Text and layout

Fixed orientation lock (WCAG 1.3.4), missing screen title

Dynamic Type support, text truncation (WCAG 1.4.4)

Screen reader to test with

TalkBack

VoiceOver

Voice input to test with

Voice Access

Voice Control

Verify by hand

TalkBack full flows, Switch Access, system font scaling

VoiceOver navigation, Switch Control, rotation, autofill

Mobile Accessibility Testing Checklist

Check Your App Free

Run these checks on every key screen of your Android and iOS app. Each one maps to the WCAG criterion it tests.

What to Check

WCAG Criterion

Labels

Every button, image, and field has a name a screen reader can read

1.1.1, 4.1.2 (A)

Color contrast

4.5:1 for normal text, 3:1 for large text

1.4.3 (AA)

Text size

Content stays usable with text enlarged to 200%

1.4.4 (AA)

Touch targets

At least 24 by 24 CSS pixels; 44 by 44 for the enhanced level

2.5.8 (AA), 2.5.5 (AAA)

Orientation

Screens work in portrait and landscape

1.3.4 (AA)

Focus order

Focus moves in the same order as the visual layout

2.4.3 (A)

Gestures

Multi-finger and path gestures have a single-tap alternative

2.5.1 (A)

Status messages

Alerts and updates are announced without moving focus

4.1.3 (AA)

Screen readers

Key flows complete with TalkBack and VoiceOver

Manual check

Reporting and Compliance for Mobile App Accessibility

Real Devices, Not Emulators

Screen readers, touch targets, and font scaling can behave differently on emulators. Scans run on real devices.

WCAG, ADA, EAA & Section 508

Choose WCAG 2.0, 2.1, or 2.2 at Level A, AA, or AAA, the basis for ADA, Section 508, AODA, EAA, and EN 301 549. Every issue links to the criterion it fails.

Severity You Can Triage

Issues are ranked Critical, Serious, Moderate, or Minor, with the element path and fix guidance.

Audit-Ready Reports

Export PDF or CSV reports and keep scan history as evidence for the VPAT your team writes.

Accessibility Score

Track one density-adjusted score per app over time, weighted toward the elements people interact with.

Jira, Slack & GitHub

File a bug from any issue with the WCAG reference, severity, and element already filled in.

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AI-Agentic Quality Engineering

AI-native agents that plan, run, and analyze tests across web and 10,000+ real Android and iOS devices.

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Real Device Cloud

App Automation

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Accessibility Testing

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Detailed agent analysis under test, from the perspective of a synthetic end-user.

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End to end regression testing for agent under test with insights.

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