App Development
We develop native and cross-platform apps for iOS and Android, covering everything end-to-end from planning and design through ongoing operation.
Facing challenges like these?
- We built an app, but no one uses it — retention keeps coming in low.
- We want to support both iOS and Android without the cost and effort ballooning.
- We outsourced development, but constant spec misunderstandings meant what we got didn’t match what we expected.
- We need a team that can handle post-launch operations, maintenance, and new feature development.
The VIETIS Approach
A development process that starts with UX design
We align on user stories and prototypes before development begins, with design work focused on delivering an app people actually use.
End-to-end, from planning to operations
The same team handles requirements definition, design, development, testing, release, and ongoing maintenance — no information is lost in handoffs.
AI-driven development that doesn’t trade off speed for quality
We combine a strong delivery track record with hands-on AI expertise to ship apps that reliably work, with quality managed to CMMI Level 3 standards.
Scope of Work
We cover the full spectrum of app development, from native builds to cross-platform solutions.
iOS App Development
Native iOS apps built with Swift/SwiftUI, with full support through App Store submission and review.
Android App Development
Native Android apps built with Kotlin/Jetpack Compose, including Google Play publishing and update support.
Cross-Platform Development
Simultaneous iOS/Android development using Flutter and React Native, delivering high-quality UX while keeping development costs down.
Backend & API Development
Design and development of the server-side systems, REST APIs, and push notification infrastructure behind your app, including integration with existing systems.
UI/UX Design
User research, wireframing, and prototyping to deliver designs that balance usability with visual appeal.
Quality Assurance & Security
Quality management to CMMI Level 3 and ISO 27001 standards, covering everything through security testing and performance optimization.
Development Process
Starting from planning and UX design, the same team carries the project through five well-defined phases.
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01
Planning & Requirements Definition
Creating user stories and organizing functional and non-functional requirements, along with competitive research.
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02
UI/UX Design & Prototyping
Building alignment through screen design, wireframes, and interactive prototypes.
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03
Development & Testing
Agile development with working software reviewed at every sprint, alongside parallel automated and manual testing.
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04
Store Submission & Release
Support from preparing App Store and Google Play submission materials through review and publication.
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05
Operations & Improvement
Ongoing support for post-launch crash response, version upgrades, and new feature additions.
Indicative Pricing
Pricing is tailored to your project’s scale and complexity — get in touch to discuss your needs.
PLAN A
Simple App
A simple app with a single core function and a small number of screens. Also suited to MVP development.
¥1,000,000+
Estimated timeline: 2–3 months
- Requirements definition & UI design
- iOS or Android
- Basic API integration
- Store submission support
PLAN B
Standard App
An app with multiple features such as member management, payments, and notifications, supporting both iOS and Android.
¥3,000,000+
Estimated timeline: 3–5 months
- UX research & prototyping
- Simultaneous iOS & Android development
- Member management & push notifications
- Admin console & backend
- 3 months of post-launch support
PLAN C
Complex Business App
A business application requiring integration with multiple systems, offline support, and strong security.
¥8,000,000+
Estimated timeline: 5 months+
- Business process analysis & design
- Integration with existing system APIs
- Offline support & data synchronization
- Enhanced security & authentication
- Long-term operations & maintenance support
* The figures above are indicative only and will vary depending on requirements and scale. Please contact us for details.
Why clientschoose VIETIS
End-to-end, from strategy to operations
The same team owns requirements, development, and ongoing maintenance — one continuous line of support, with no handoff gaps.
AI-driven development, without trading off quality
We fold leading AI tools into our own development process, pairing that with a deep track record of hands-on delivery.
Quality management to international standards
CMMI Level 3, ISO 27001, and Japan’s Privacy Mark certified. A Japanese PM oversees quality from end to end.
Right-sized for any engagement
Whatever your budget, scale, or industry, we shape a plan around the business problem you actually have.
Start with a free consultation
Come to us even before the problem is fully defined. We listen first, then propose the right way forward.
- Consultation is free
- From 30 minutes online
- NDA on request
- Japanese-speaking team
