Introducing AccessLint: Catch iOS Accessibility Bugs at Build Time

Every iOS developer knows accessibility matters. VoiceOver support, Dynamic Type, proper touch targets, color contrast -- these aren't nice-to-haves. They determine whether millions of users with disabilities can use your app at all.

But here's the problem: accessibility bugs are invisible to most developers. Your app looks fine on your screen. It passes all your unit tests. Then a VoiceOver user opens it and hits a wall of unlabeled buttons and inaccessible controls.

Code review catches some of these issues. Manual audits catch more. But both are slow, inconsistent, and expensive. What if your build pipeline could catch them automatically, the same way a linter catches syntax errors?

That's what AccessLint does.

What AccessLint Is

AccessLint is a static analysis tool for iOS accessibility. It scans your SwiftUI and UIKit source files and flags accessibility violations before they reach production. No simulator required. No runtime instrumentation. It reads your code and tells you what's wrong.

It ships with 25 rules covering the most common accessibility failures in iOS apps:

• Missing labels -- Buttons, images, and controls without accessibility labels
• Dynamic Type -- Hardcoded font sizes that break text scaling
• Color contrast -- Foreground/background combinations below minimum ratios
• Touch targets -- Interactive elements smaller than 44x44 points
• VoiceOver -- Missing traits, broken grouping, inaccessible custom controls
• Reduce Motion -- Animations that ignore the user's motion preferences
• Orientation Lock -- Views that force portrait or landscape without justification

Each rule maps to a real pattern that causes real failures for real users.

How It Works

AccessLint runs as a CLI tool. Point it at your project, and it scans every Swift file for violations:

$ accesslint scan ./MyApp/Sources

The output tells you exactly what's wrong and where:

MyApp/Sources/ProfileView.swift:42:5: warning: [MISSING_LABEL]
  Button with tap action has no accessibility label.
  Add .accessibilityLabel("description") to provide context for VoiceOver users.

MyApp/Sources/CardView.swift:18:9: warning: [TOUCH_TARGET_SIZE]
  Interactive element has explicit frame of 30x30.
  Minimum touch target size is 44x44 points per Apple HIG.

Found 2 accessibility violations in 47 files (0.8s)

Here's a concrete example. This SwiftUI code looks fine at first glance:

struct ProductCard: View {
    let product: Product

    var body: some View {
        Button(action: { addToCart(product) }) {
            Image(product.thumbnailName)
                .resizable()
                .frame(width: 32, height: 32)
        }
    }
}

AccessLint flags two issues: the Button wrapping an Image has no .accessibilityLabel(), so VoiceOver users hear nothing meaningful when they land on it. And the 32x32 frame is below the 44x44-point minimum touch target, making it hard to tap for users with motor impairments.

The fix is straightforward:

Button(action: { addToCart(product) }) {
    Image(product.thumbnailName)
        .resizable()
        .frame(width: 44, height: 44)
}
.accessibilityLabel("Add \(product.name) to cart")

AccessLint catches this at build time, before it ships to anyone.

CI Integration

Running AccessLint locally is useful. Running it in CI is where it pays for itself. Every pull request gets scanned automatically, and accessibility regressions get flagged before they merge.

GitHub Action:

name: Accessibility Lint
on: [pull_request]

jobs:
  accesslint:
    runs-on: macos-latest
    steps:
      - uses: actions/checkout@v4
      - uses: SyncTek-LLC/AccessLint@v1
        with:
          path: ./Sources
          fail-on-violation: true

That's it. Any PR that introduces an accessibility violation fails the check. Your team stops debating whether to fix accessibility issues -- the pipeline enforces it.

Homebrew:

$ brew tap synctek-llc/accesslint
$ brew install accesslint

Swift Package Manager:

Add AccessLint as a package dependency for projects that prefer SPM-based tooling:

.package(url: "https://github.com/SyncTek-LLC/AccessLint.git", from: "1.0.0")

Why We Built This

We've worked on iOS codebases where accessibility was a priority -- on paper. There were guidelines in the wiki. There were occasional audits. There were well-intentioned engineers who genuinely cared.

And there were still dozens of unlabeled buttons, hardcoded fonts, and 24x24 tap targets shipping to production every sprint.

The issue isn't intent. Most iOS teams want to build accessible apps. The issue is enforcement. Manual code review doesn't scale. Accessibility audits happen quarterly if you're lucky. And by the time someone runs VoiceOver on the new feature, it's already shipped.

Static analysis solves the enforcement problem. It runs on every commit, it never gets tired, it never forgets to check, and it gives developers immediate feedback while the code is still fresh in their minds. Developers fix accessibility issues in the same PR where they introduced them, instead of discovering them three months later in a backlog ticket nobody will ever prioritize.

AccessLint doesn't replace accessibility expertise. It doesn't replace user testing with people who actually use assistive technology. Those are irreplaceable. What it does is catch the mechanical stuff -- the missing labels, the wrong frame sizes, the hardcoded fonts -- so your team's limited accessibility review time goes toward the hard problems that require human judgment.

Pricing

AccessLint is a paid tool. Running a reliable, maintained static analysis product costs money, and we price it honestly.

Team -- $19.99/month

• 25 rules, CLI + CI integration
• Up to 5 seats
• Email support

Enterprise -- $49.99/month

• Everything in Team
• Unlimited seats
• Custom rule configuration
• Priority support

Both tiers include all current rules and all future rules shipped during your subscription.

Get Started

Install AccessLint and run your first scan in under two minutes:

$ brew tap synctek-llc/accesslint
$ brew install accesslint
$ accesslint scan ./YourApp/Sources

Or drop the GitHub Action into your CI pipeline and start catching accessibility regressions on every pull request.

Full documentation is at accesslint.app/docs. The landing page with feature details and signup is at accesslint.app.

If your iOS app has users, some of them rely on accessibility features. AccessLint helps you stop letting them down.