Mobile App Audit Checklist: Security, UX and Performance

An app audit checklist is a structured list of checks that tells you whether a mobile app is secure, fast, usable, accessible and compliant with store and privacy rules. A good audit covers security, code quality, performance, user experience, accessibility, content and store compliance, then ranks every finding by severity so the team fixes what matters first. Run one before launch, after major updates and on a regular schedule.

Apps decay quietly. Dependencies age, operating systems change, features pile up and small UX problems become habits. An audit is the moment you step back and check the whole product against a consistent standard. Below is a practical checklist you can use, grouped by area, plus guidance on when to audit and how to report findings.

What an app audit is

An app audit is a systematic review of a mobile or web app against agreed best practices. It looks at the code, the infrastructure behind it, the interface and the experience of real users, and produces a list of issues with recommended fixes. It is not the same as QA testing, which checks that features work as specified. An audit asks whether the app is built and designed well, and whether it will stay healthy.

Types of app audit

Small teams often combine these into one audit. Larger or regulated apps usually run security and compliance audits separately, with specialists.

When to audit an app

• Before launch, to catch problems while they are cheap to fix and before store review.
• After major updates, such as a redesign, a new payment flow or a backend change.
• When you inherit an app, from another team or vendor, so you know what you are taking on.
• When metrics slip, such as rising crashes, falling ratings or lower conversion.
• On a schedule, for example once or twice a year, to catch slow decay.

Security checklist

The OWASP Mobile Application Security Verification Standard is the most widely used reference for mobile security checks. At a minimum, confirm:

• Sensitive data is not stored in plain text on the device; use the platform keychain or keystore.
• All network traffic uses TLS, and the app does not accept invalid certificates.
• Authentication tokens expire, refresh safely and are revoked on logout.
• APIs check authorization on the server for every request, not only in the app.
• No secret keys, credentials or debug endpoints ship inside the app bundle.
• Third party SDKs and libraries are current, necessary and free of known vulnerabilities.
• Logs and crash reports do not contain personal data.

Code quality and architecture checklist

• The project builds cleanly from a fresh checkout with documented steps.
• Code follows a consistent architecture, and business logic is not buried in UI code.
• Automated tests cover critical flows such as sign up, login and payment.
• Dependencies are pinned, and nothing relies on abandoned libraries.
• The app supports the operating system versions your users actually run.
• Releases go through a repeatable pipeline rather than a developer's laptop.

Performance checklist

• Cold start time is measured on mid range devices, not only flagship phones.
• Scrolling lists stay smooth with real data volumes.
• Images are sized and compressed for mobile, and cached sensibly.
• The app handles slow, intermittent and offline connections gracefully.
• Background work does not drain the battery or wake the device unnecessarily.
• Crash and error rates are tracked, with the top issues known by name.

Content checklist

• Every screen has one clear purpose and a clear primary action.
• Headings create an obvious hierarchy so users can scan.
• Labels and terms are consistent everywhere; the same action has the same name.
• Videos do not autoplay with sound, and users control media.
• Each content area has an owner and a review date, so information stays accurate.
• Error messages explain what happened and how to fix it, in plain language.

Typography and visual design checklist

• A design system defines type, color, spacing and components, and the app follows it.
• Text sizes are readable on small screens and respect the user's system text size setting.
• The app uses a limited set of typefaces and weights, applied consistently.
• Color contrast meets accessibility guidelines for text and controls.
• Icons are clear, consistent in style and paired with labels where meaning is not obvious.
• Layouts leave enough space around content so screens do not feel crowded.

Navigation checklist

• Top level navigation is short and clearly differentiated from content.
• Users always know where they are and how to go back.
• Navigation follows platform conventions on iOS and Android, as described in Apple's Human Interface Guidelines and Google's Android quality guidance.
• Deep links open the right screen, with sensible behavior if the user is logged out.
• Key tasks take as few steps as possible.

Search checklist

• Search tolerates typos and offers suggestions or autocomplete.
• Results show the most useful information first.
• Long lists offer sorting and filtering.
• Empty results suggest what to try next instead of a dead end.
• Recent searches are available where they help.

Interaction and accessibility checklist

• Touch targets are large enough and spaced to prevent accidental taps; Apple recommends at least 44 by 44 points and Material Design 48 by 48 density independent pixels.
• Every interactive element has a visible pressed or focused state.
• Screen readers announce controls with meaningful labels.
• The app works with larger text, reduced motion and high contrast settings.
• Destructive actions ask for confirmation or offer undo.
• Forms validate inline, keep user input on error and use the right keyboard type.
• Flows follow a logical order, with progress shown in multi step tasks.

The Web Content Accessibility Guidelines 2.2 are written for the web, but most of their success criteria translate directly to app screens and are a useful baseline.

Store and privacy compliance checklist

• Privacy disclosures in the App Store and the Google Play Data safety section match what the app and its SDKs actually collect.
• Permission requests appear in context and explain why access is needed.
• Users can delete their account and data where store rules require it.
• The app targets the platform versions each store currently requires.
• Payments for digital goods follow each store's billing rules.
• Data handling meets the privacy laws of the markets you serve.

How to run the audit and report findings

1. Agree the scope and the standards you will audit against.
2. Gather access: source code, builds, analytics, crash reports, backend documentation and test accounts.
3. Run the checks area by area, combining automated tools with manual review on real devices.
4. Record each finding with a description, evidence such as a screenshot or log, the affected screens and a severity rating.
5. Prioritize by user impact and risk: security and data issues first, then crashes and blocked flows, then usability and polish.
6. Agree a remediation plan with owners and dates, and retest fixed items.

Choosing who audits your app

An internal team knows the product but may miss problems they have learned to live with. An external reviewer brings fresh eyes and broader comparison. Look for experience across the audit types you need, a clear method, findings written for both developers and decision makers, and support after the report so fixes actually happen.

Get an independent review

A checklist is a starting point; the value comes from acting on the findings. Our mobile app development team audits, fixes and rebuilds apps, and a codebase review gives you a clear picture of an inherited app before you commit to changes. You can see how we approach product flows in our case studies, or contact us to scope an audit.