Mobile App Testing｜Software Testing｜QA Services

We make your mobile apps run “Chanto” — Properly, Smoothly, and Reliably on every device

Mobile app issues often arise not only from device‑specific behavior but also at the boundaries of communication and data integration.
Our test centers in Yokohama, Fukuoka, and Da Nang are equipped with a wide range of real devices and OS environments. By leveraging this extensive testing infrastructure, we adopt a holistic approach that includes backend systems.
Rather than simple “function checks,” we provide comprehensive end‑to‑end validation, supporting the reliability of your mobile apps and contributing directly to your business success.

Why Choose Us
Our Services
Our Process

Why Clients Choose Us

Extensive Testing Environments

Preventing Device‑Dependent Issues Through Real‑Device Coverage
Our test centers in Yokohama, Fukuoka, and Da Nang are fully equipped with a vast collection of real devices, from the latest models to older OS versions. This allows us to thoroughly test for device‑dependent issues unique to mobile apps. Through optimized matrix testing across devices, OS versions, and screen sizes, we reduce the cost of maintaining devices on your side while ensuring high‑quality performance that reflects the diverse environments of your users.

ISTQB Partner

Evidence‑Based Quality Assurance Grounded in Globally Recognized Testing Theory
As an official partner of ISTQB (International Software Testing Qualifications Board), the international certification body for software testing professionals, we employ a large number of JSTQB-certified engineers. Rather than relying on ad‑hoc “function checks,” we develop strategic test plans grounded in established test‑design theory. Through an efficient, risk‑based approach, our engineers support early defect detection and maximize quality even within limited development timelines.

Extensive Experience and Broad Domain Knowledge

Domain‑Specialized Validation Backed by Deep Understanding of Critical Business Logic
We have a proven track record across a wide range of industries, including finance, e-commerce, and public services. Our engineers possess deep, domain‑driven knowledge of industry‑specific business logic and the “hot spots” where defects tend to emerge in complex system integrations. Leveraging past insights, we proactively identify ambiguities and hidden risks within specifications, delivering reliable quality that directly supports your business success.

Service Overview

As an IV&V company, we cover the full lifecycle of mobile app testing—from test planning, including optimal device selection, to analysis, design, implementation, and execution.

Functional Testing
Functional Testing is a type of testing that verifies whether software correctly executes its functions according to the specifications. It focuses primarily on “what” the system does and checks its behavior from the user’s perspective.
Our functional testing service thoroughly verifies whether your systems and services function exactly as expected, ensuring they behave in line with the intended specifications and user expectations.

Usability Testing
We deeply examine how easy your website, application, or software is for real users to operate. By adopting the perspective of your target users, we evaluate ease of operation, clarity, efficiency, and overall satisfaction from multiple angles. Based on these insights, we provide actionable recommendations that enhance the user experience (UX) and contribute to stronger business outcomes.

Field Testing (User Acceptance Testing)
We verify how your mobile application performs when used by real users in real‑world environments—outdoors, while driving, and during various activities.

Platform Testing (Multi‑Device, Multi‑OS, Multi‑Browser)
We propose the appropriate combination of devices based on your product strategy and perform comprehensive testing across device, OS/version, and screen‑resolution variations to uncover dependency‑related issues.

Load Testing & Performance Testing
We test actual load and performance conditions, such as response time and concurrent user volume, to identify performance bottlenecks.

Security Assessment
Partnering with GMO Cybersecurity by Ierae, Inc., a leader in vulnerability assessment with world‑class analysis technology, we provide hybrid assessments combining manual and tool‑based methods for Android apps, iOS apps, web applications, networks, IoT devices, and more.
By integrating product verification and vulnerability assessment into a seamless process, we centralize information management while ensuring superior quality and enhanced security levels concurrently.

Test Automation
To ensure mobile application quality after release, we continuously verify whether it functions correctly through automated testing.

Our Process

①

Quality Assessment and Consultation

• Understanding the target service
• Identifying quality issues
• Proposing solutions to address quality issues

Output:
• Quality improvement proposal

②

Test Planning

• Clarifying test objectives
• Defining the test approach
• Updating the test plan
• Considering test automation

Output:
• Test plan

③

Monitoring and Control

• Collecting metrics
• Tracking progress
• Controlling the overall test process

④

Test Analysis

• Analyzing the test object based on the test basis
• Extracting and defining test conditions

Output:
• Test design specification

⑤

Test Design

• Applying test techniques (Equivalence Partitioning, Boundary Value Analysis, Decision Table Testing, Pairwise Testing, State Transition Testing, Orthogonal Arrays Testing, etc.)
• Designing the test architecture
• Creating detailed test designs

Output:
• Test specification

⑥

Test Implementation

• Creating test cases
• Creating test procedures
• Creating test suites
• Setting up the test environment

Outputs:
• Test cases
• Test procedures

⑦

Test Execution

• Executing tests
• Verifying fixes

Outputs:
• Test logs
• Incident reports (critical incidents are reported immediately)
• Progress reports

⑧

Test Completion

• Reporting test results

Outputs:
• Test summary report
• Quality improvement proposal

Staying Ahead of the Latest QA Trends

We regularly host Ques, a specialized event for QA engineers, to stay updated on the latest QA trends from various companies and continuously enhance our skills and services.