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Mobile App Testing Services

Mobile Testing That
Catches What Users Feel

iOS and Android. Native and hybrid. STS tests your mobile app across device types, OS versions, and network conditions so your users never find the bugs first.

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Years of QA experience
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Products tested
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Industries served
The basics

What Is Mobile App Testing?

Mobile app testing validates that your application performs correctly, looks right, and behaves predictably across the full range of devices, operating system versions, screen sizes, and network conditions your users actually encounter in the real world.

It goes beyond functional correctness. A properly tested mobile app handles interrupted network connections, low memory states, permission changes mid-session, and background/foreground transitions without crashing or losing user data.

STS combines real physical devices, emulators, and cloud device farms to give your app the coverage it needs before it reaches the App Store or Google Play.

By the numbers
47
Device types covered
iOS & Android
Full platform expertise
Appium + native
Automation tooling
Coverage

Mobile Testing Types We Cover

Mobile quality failures are rarely one-dimensional. Our coverage spans the full spectrum of what can go wrong on a real device in a real user's hands.

Functional Testing

Every feature, every target device

Verify every feature works correctly on every device in your target matrix. We trace requirements to test cases and track pass/fail results at the device level.

Compatibility Testing

Across screen sizes, OS versions, manufacturers

Test across Samsung, Pixel, OnePlus, Apple, and more. Validate layout rendering, touch targets, and gesture navigation on every screen size you ship to.

Performance Testing

Load times, battery drain, memory under stress

Measure app launch time, scroll frame rate, battery consumption, and memory footprint under realistic load. Catch regressions before users report slowdowns.

Usability Testing

Real user journeys, touch targets, gesture nav

Walk through real user flows to validate touch target sizing, gesture recognizers, accessibility of interactive elements, and the overall experience on a real device.

Interrupt Testing

Calls, notifications, low battery, background/foreground

Validate how your app handles real-world interruptions: incoming calls, push notifications, low battery warnings, permission prompts, and background/foreground transitions. No data loss, no crashes.

Installation & Update Testing

Fresh install, upgrade, uninstall, data migration

Test fresh installs, version upgrades, and uninstall/reinstall flows. Confirm user data migrates correctly between versions and nothing breaks when users update from the app store.

How we work

Our Mobile Testing Approach

01

Device Matrix & Test Planning

Step 1

Define the device matrix from your user analytics. Prioritize real OS versions, manufacturers, and screen sizes.

Analytics review Device priority Scope sign-off
02

Multi-Device Execution

Step 2

Structured test cycles across real devices and emulators. Every defect logged with screenshots, device specs, and repro steps.

Real devices Screenshot capture Defect triage
03

Performance & Stability Report

Deliverable

Full compatibility matrix, performance benchmarks, and prioritized defect list ready for your dev team.

Compatibility matrix Benchmarks Defect list
How We Test

Real Devices. Real Conditions.

Emulators miss things. We test on real phones and tablets across iOS and Android using cloud device platforms. That means real touch input, real OS behavior, real performance characteristics.

We build a device matrix based on your analytics and user base, then execute across the combinations that matter. Not every device on the market. The ones your users actually have.

Device Cloud Platforms
BrowserStack
3,000+ real devices. Instant access to iOS and Android across every major OS version and screen size.
Sauce Labs
Enterprise-grade device cloud with detailed session logs, video playback, and network condition simulation.
LambdaTest
Cross-browser and cross-device testing with screenshot comparison and responsive testing built in.

"It has stripped away a lot of the fear of deploying software that isn't great because whenever something doesn't work, or when things aren't perfectly logical, STS always catches it."

Steph Bigue
CEO, Manyways

"Their professionalism, commitment to delivering on time and critical thinking have allowed Full Stack Resources to successfully deliver many high-profile projects."

Chris De Sousa
Managing Partner, Full Stack Resources
47
Device types tested
99.1%
Crash-free rate
iOS + Android
Full platform coverage
Keep exploring

Related Services

QA Consulting

Embed a QA consultant with your team. Build the process, coverage, and confidence to ship reliably on every platform.

Learn more

Project Based QA

Fixed-scope QA for a specific release or sprint cycle. Clear deliverables, defined timelines, and no long-term commitment required.

Learn more

Managed Testing

Ongoing quality coverage managed end-to-end by STS. We own the test cycle so your team stays focused on shipping product.

Learn more
Industries

Where we do our best work

Healthcare

Patient portals, care coordination, clinical software

Learn more

Legal & Law Firms

Billing systems, Elite 3E, Intapp, matter management

Learn more

Cannabis & CPG

Regulated platforms, POS systems, compliance workflows

Learn more

Fintech

Payment infrastructure, financial data platforms

Learn more

eCommerce

Transaction flows, mobile checkout, platform migrations

Learn more
FAQ

Mobile Testing FAQ

Both, and the distinction matters. Emulators and simulators are faster for early-cycle regression testing and CI/CD integration. Real physical devices are required for accurate performance measurement, network condition testing, hardware interaction, and validating camera, GPS, biometric, and notification flows. We define the split based on what your app does and where the highest risk sits. Learn more about our approach.

For iOS, we cover iOS 16 through the current release (iOS 18). For Android, Android 12 through Android 15. The actual matrix for your engagement is defined by your user analytics. There is no point testing on OS versions your users do not run. We pull the distribution data with you during scoping and prioritize accordingly.

Yes. We test native iOS apps, native Android apps, and cross-platform apps built with React Native, Flutter, or Xamarin. For cross-platform codebases, we explicitly verify platform-specific behavior because a single codebase does not guarantee identical behavior. UI rendering, gesture handling, and platform API differences routinely produce separate defect classes on each OS. Our functional testing methodology ensures full coverage across both platforms.

For devices outside your physical inventory, we use cloud device farms like BrowserStack and Firebase Test Lab. These give access to hundreds of real devices running specific OS versions without procurement overhead. We configure and manage the cloud execution as part of the engagement. You get the results without needing to own the hardware.

Yes. We can build and maintain Appium, XCUITest, or Espresso automation suites that run on every build as part of your CI pipeline, whether you use Bitrise, GitHub Actions, CircleCI, or another tool. The goal is to catch regressions automatically on each push so manual test cycles focus on new functionality rather than re-verifying what already worked. Talk to our QA consulting team to scope this out.

Let's talk

Your Users Test on Real Devices.
Shouldn't You?

A 30-minute call is usually enough to scope your device matrix and give you a clear picture of what coverage would look like. No pitch deck, no obligation.

Get a Free Consultation See our approach