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LVManual testing by ISTQB-certified engineers
Stop second-guessing the quality of your product. Comprehensive manual testing across 5,000+ devices gives you certainty that every interaction delights, every feature works, and every release builds trust. Validated by ISTQB-certified engineers who think like users and test like experts. Deliver with confidence—not guesswork.
The real value of manual testing
Automation accelerates routine checks, but algorithms alone can't capture the full user experience. Manual testing uncovers what automated scripts miss—the confusing flows, the frustrating interactions, and the subtle issues that quietly push users away. Manual testing reduces blind spots and delivers confidence where automation falls short.
Automated scripts return binary results, but users don't care if your tests pass or fail. They judge how your product feels—intuitive or confusing, smooth or frustrating. Manual testing focuses on real human reactions, ensuring every tap, swipe, and click feels natural.
Establishing real-device manual testing for Koa Health
Koa Health, a digital mental healthcare provider, faced critical quality issues across three of their applications. Users were discovering bugs in production—scrolling glitches, broken audio, frustrating UI issues—because simulators couldn't replicate real-world scenarios. Incomplete test cases and inconsistent bug reports made it difficult to find and prevent issues. Every bug eroded trust and damaged their reputation.
TestDevLab partnered with Koa Health to implement comprehensive manual testing, evaluate software from a human perspective, and catch usability and UI issues that simulators missed. A critical component of the solution was the creation and deployment of a device matrix leveraging our fleet of 5,000+ real devices, ensuring accurate test coverage across diverse environments and real conditions.
Key results:
- Increased testing efficiency across all applications
- Improved QA processes with structured methodologies
- Greater device coverage, ensuring real-world reliability
- Comprehensive bug reporting with actionable insights
- Faster time to market with confidence in quality
Align manual testing to product stages and goals
Compare different scenarios and choose manual testing that provides maximum insight, prevents costly defects, and ensures every release meets your quality standards.
| Your situation | Recommended testing | Why |
|---|---|---|
| Just received a new build | Smoke testing | Verify basics before investing time in deep testing |
| About to release to production | UAT + System testing | Get stakeholder approval and verify complete system works |
| Just fixed bugs or added features | Regression testing | Ensure you didn't break existing functionality |
| Integrating third-party services | Integration testing | Verify seamless communication between systems |
| Early development stage | Exploratory + Smoke testing | Iterate quickly and catch major issues early |
| Complex user workflows | System + Usability testing | Ensure end-to-end processes work and feel right |
Helping clients win with manual testing
We speak your industry's language—from compliance to real user behavior. We test the way your users actually use your product, on real devices and in real conditions, not in perfect lab conditions.
Comprehensive reporting
Replace vague bug reports with precise, actionable insights that speed up fixes and prevent repeat defects.
- Clear reproduction steps
- Expected vs. actual behavior
- Severity and priority classification
- Screenshots, videos, and logs
- Suggested fixes when applicable
Flexible engagement models
Choose the engagement model that works for you and get the testing support you need, when you need it.
- On-demand testing for specific releases
- Dedicated QA teams embedded in your workflow
- Consulting to build internal testing processes
- Hybrid approaches combining manual and automation
Real devices, real conditions
Expose your product to real-world scenarios, not just simulators. We test on 5,000+ real devices under spotty networks, low battery, background apps, and interruptions—exactly as your users experience it.
ISTQB-certified engineers
Leverage the expertise of ISTQB-certified engineers who go beyond clicking buttons. They identify hidden risks, prioritize defects, and design systematic tests that prevent costly issues.
Industry-specific expertise
Test with context, not checklists. Our engineers combine industry knowledge with real-world testing practices to understand your unique industry challenges, regulatory requirements, and user expectations.
Smooth performance across all platforms
Deliver consistent web app performance
Stop losing prospects to technical glitches and deliver a seamless, uninterrupted experience that drives user trust and conversions. We manually test your web app on every browser, OS, and device, and conduct precise compatibility testing across all target environments to ensure consistent functionality, perfect rendering, and SLA-aligned performance.
Provide a reliable mobile app experience
Strengthen your mobile app experience by validating critical non-functional characteristics across a wide range of iOS and Android devices. Our manual testing services uncover inconsistencies, tests reliability under resource constraints, and verifies native API integrations, ensuring a smooth, intuitive interaction that users trust.
Ensure desktop stability for all configurations
Offer a desktop app experience that users can trust on every supported system. Our manual testing services validate installation, compatibility, and functional stability across all target hardware and OS versions to detect configuration-specific failures, confirm reliable setup processes, and ensure predictable performance.
Scale without compromising quality
Find critical software bugs and defects early. With over a decade of experience, ISTQB-certified QA engineers, and access to a fleet of real testing devices, we guarantee your product is in expert hands.
Don't waste time on a broken build. Smoke testing verifies the basics. Can users log in? Does the app launch? We catch showstoppers instantly, so your team focuses on real testing, not troubleshooting. This critical test phase ensures users can access and use core product features like login, checkout, and navigation.
Technical manual testing process
Our methodology strictly complies with the Software Test Lifecycle (STLC), ensuring professional QA workflow and requirements traceability at every step.
Test analysis
We start by understanding what success looks like for you—your vision, your goals, your users' needs—so every test we run moves you closer to a product that delivers on its promise. This identifies specific test conditions and ensures test coverage aligns directly with business risk and compliance requirements.
Test planning & design
We define a comprehensive test strategy, including the test plan, risk analysis, resource allocation, and formal test environment setup. We then proceed to test design, selecting optimal techniques to develop logical test cases.
Test implementation & execution
Test implementation involves prioritizing and structuring logical test cases into executable test procedures and creating final test data. During test execution, our team applies these procedures across various target environments to identify failure modes.
Defect management & reporting
Every deviation from expected results is formally documented as a defect in an incident report. Reports include clear reproduction steps, observed vs. expected results, and formal classification by severity and priority according to our established defect taxonomy.
Test closure & retesting
Following development fixes, our QA engineers conduct targeted confirmation testing and regression testing to verify defect resolution and ensure no side effects were introduced. Once test completion criteria are met, we deliver a formal test summary report and final project sign-off.
Proven expertise across high-stakes industries
Strengthen your product with industry-focused manual testing. Our certified QA engineers uncover high-risk issues early, helping you prevent costly failures, protect reputation, and deliver reliable user experiences every time.
True quality comes from human-driven testing
Manual QA testing services remain the most reliable method for comprehensive validation, confirming applications align precisely with final product specifications and business objectives.
TestDevLab provides results-driven manual testing led by certified QA engineers, proven methodologies, and real device coverage. We help you catch critical issues early, reduce risks, and maintain consistent quality across every platform.
- 500+experienced QA experts
- 14years in business
- 10physical locations
- 20+countries our clients come from
