--- source_url: "https://qacraft.com/compatibility-testing-services/" title: "Compatibility Testing Services | OS, Device & Network QA | QACraft" mirrored_at: 2026-08-15T03:33:47.342Z host: qacraft.com cited_in_42a: true mirror_canonical: "https://index.42a.ai/qacraft.com/compatibility-testing-services/index" --- > **Original source:** https://qacraft.com/compatibility-testing-services/ what it is ## What Is Compatibility Testing? Compatibility testing is the practice of verifying that your software works correctly across every environment your users might run it on — different operating systems and versions, device types and screen sizes, hardware configurations and network conditions. It is how you eliminate the "works on my machine" defect: the bug that is invisible on the developer’s setup but very real on a three-year-old Android phone, an older macOS, or a slow connection. QACraft's **compatibility testing services** validate your critical flows across an environment matrix built from your real users — Windows, macOS and Linux; Android and iOS versions; screen sizes; and fast, slow and offline networks — on real devices and environments. This service covers everything **beyond** the browser. For browser-specific rendering and behaviour across Chrome, Firefox, Safari and Edge, see its sibling — our [cross-browser testing services](https://qacraft.com/cross-browser-testing-services/). Both sit under our [functional testing](https://qacraft.com/functional-testing-services/) umbrella. our services ## Our Compatibility Testing Services We build compatibility coverage around the environments your users actually run — operating systems, devices, hardware and networks. Most engagements combine several of the services below. **OS Compatibility Testing** Validate your software across Windows, macOS and Linux — and across the OS versions still in real use, not just the latest. **Device Compatibility Testing** Phones, tablets, laptops and desktops across vendors and tiers — so the experience holds from flagship to budget hardware. **OS Version & Backward Compatibility** Confirm new releases still work on the older OS versions your users have not upgraded from, and that upgrades do not break existing installs. **Screen Size & Resolution** Verify layouts and interactions across resolutions, aspect ratios and pixel densities, from small phones to large desktops. **Network Condition Testing** Behaviour on fast, slow, high-latency, intermittent and offline networks — because connectivity is part of the environment. **Hardware & Configuration Testing** Different hardware capabilities, memory, and system configurations, so low-end and unusual setups still work. ### Flexible engagement models **Dedicated QA Pod** A QA pod that owns your compatibility coverage every release, priced by configurations kept green rather than hours. **Staff Augmentation** QA engineers who plug into your existing process and device lab under your leadership — scaled up or down monthly. **Fixed-Scope Compatibility Pass** One product, one agreed environment matrix, full coverage across OS, device and network — one quote, one report. tools & frameworks ## Tools & Frameworks We Use Tool choice is decided in Phase 1, against your environment matrix and CI — never by default. Compatibility work spans real-device clouds, VMs and network simulation: **BrowserStack** Real desktop OS and mobile-device cloud across Windows, macOS, Android and iOS. **Sauce Labs** Real-device and VM cloud with parallel runs and CI integration. **AWS Device Farm** On-demand real Android and iOS devices that scale with your pipeline. **Real device lab** Physical phones, tablets and machines for the configurations that matter most. **Virtual machines** Windows, macOS and Linux VMs for OS-version and configuration coverage. **Network throttling** Simulated 3G/4G/5G, high-latency, intermittent and offline conditions. **Appium** Cross-platform automation for mobile device-matrix coverage. **CI integration** Compatibility runs wired into Jenkins, GitHub Actions or GitLab CI. why automate ## Why Compatibility Testing Matters Your users are not all on your machine. They are on old phones, locked-down work laptops, every OS version, and networks that drop. A defect on any common configuration is a user who thinks your product is broken. Here is what compatibility testing changes: **Works on every user’s setup** Your software is verified across the real OS/device/network mix your users have — not just the team’s machines. **Kill "works on my machine"** Configuration-specific defects are caught in QA, where they are cheap, not in a support ticket from a frustrated user. **Reach all your users** Coverage of the long tail of devices and OS versions means no real segment gets a broken experience. **Catch OS & hardware bugs** Issues that only appear on a specific OS, device tier or hardware capability are surfaced before launch. **Network resilience** Your app is validated on slow, flaky and offline connections, not just fast office wifi. **Confident launches** A full compatibility matrix means a release works everywhere it needs to — no post-launch firefighting. our process ## Our Compatibility Testing Process Every engagement follows the same disciplined path — and produces a concrete artifact at the end of each phase, so you always know exactly what you are getting. PHASE 01 · WEEK 1 ### Define the Environment Matrix We pull your analytics to build the matrix your users actually run — operating systems, OS versions, device types, screen sizes and network conditions — ranked by reach. → artifact: data-driven OS/device/network matrix PHASE 02 · WEEK 1–2 ### Test Across Configurations We run your critical flows across the matrix — Windows/macOS/Linux, Android/iOS versions, screen sizes, and slow/offline networks — on real environments. → artifact: per-configuration pass/fail results PHASE 03 · ONGOING ### Log Config-Specific Defects We log issues that only appear on specific configurations — an OS version, a low-end device, a flaky network — with the exact environment and reproduction steps. → artifact: config-specific defect reports PHASE 04 · ONGOING ### Automate & Re-verify Stable checks are automated across device clouds and re-run on every release, so a new build is verified across the full matrix before it ships. → artifact: automated compatibility suite in CI ### See the compatibility matrix A sample run across an OS × device × screen-size matrix — every configuration your users run, **lighting up green as each combination passes.** qacraft@lab — compatibility matrix · app 3.1IDLE platform × configuration0/25 verified columns = OS versions × screen sizes ▶ press run — every OS, device & screen combination, verified simulation · real OS/device runs report coverage exactly like this automate it ## Automated Compatibility Testing Compatibility testing means the same flows across many environments — repetitive and broad, which makes it ideal for automation. We automate stable checks across device clouds so every release is re-verified across the matrix in parallel. AI helps select which configurations a given change is most likely to affect and classify config-specific failures as real vs flaky — with a QA engineer reviewing the verdict. See our [automation](https://qacraft.com/automation-testing-services/) and [mobile automation](https://qacraft.com/mobile-automation-testing-services/) services. industries ## Industries We Serve We provide compatibility testing for teams across high-reach industries, where the diversity of users’ devices and networks is exactly the risk. why us ## Why Choose QACraft for Compatibility Testing Teams choose QACraft when they want QA engineers who own outcomes — not a body shop billing hours. **Real environments, not just emulators** High-traffic configurations are verified on real devices and machines, where config-specific bugs actually live. **You own everything** The compatibility suite, automation and CI config live in your repository from day one. No black boxes, no lock-in. **Data-driven matrix** We test the OS/device/network combinations your users actually run — meaningful coverage, not an arbitrary checklist. **Fast, focused kickoff** We move in days, not quarters — typically an environment matrix in the first week and first results soon after. **Flexible engagement models** Embed a dedicated pod, augment your team, or take a fixed-scope compatibility pass — scaled to your needs. **A full-stack QA partner** Compatibility connects to your [functional](https://qacraft.com/functional-testing-services/), [cross-browser](https://qacraft.com/cross-browser-testing-services/) and [mobile](https://qacraft.com/mobile-automation-testing-services/) testing under one team — joined-up, not stitched together. straight answers ## Frequently Asked Questions What is compatibility testing? Compatibility testing verifies that your software works correctly across the full range of environments your users have — operating systems (Windows, macOS, Linux), devices, OS versions, screen sizes, hardware and network conditions. It catches the "works on my machine" defects that only appear on a specific setup. What's the difference between compatibility and cross-browser testing? Compatibility testing is the broad picture — operating systems, devices, hardware, screen sizes and networks. [Cross-browser testing](https://qacraft.com/cross-browser-testing-services/) is the browser-specific slice of it: rendering and behaviour across Chrome, Firefox, Safari and Edge. If your concern is specifically browsers, that is the sibling service; this page covers everything beyond it. Which operating systems and devices do you cover? Windows, macOS and Linux on desktop; Android and iOS across the versions and device tiers in use; plus the screen sizes and hardware classes your users actually run. The exact matrix is built from your analytics in Phase 1, not from an arbitrary list. Do you test on real devices or emulators and VMs? Both, deliberately. High-traffic configurations are verified on real hardware where sensors, performance and OS skins matter; emulators, simulators and VMs extend coverage to the long tail of versions cost-effectively. Do you test under different network conditions? Yes. We validate behaviour on fast and slow connections, high-latency and intermittent networks, and offline states — because an app that works on office wifi can fall apart on 3G or in a tunnel. How do you decide which configurations to cover? By real usage data, not guesswork. We prioritise the OS/device/network combinations your analytics show your users on, cover the high-traffic ones on real environments, and use device clouds for the long tail — so coverage is meaningful without testing infinite combinations. Ready to work flawlessly on every setup? Build your plan in 60 seconds — or bring your software to a 30-minute call and leave with an OS/device coverage matrix and a single number.