Mobile App Development Services
Build Mobile Apps That Solve Real-World Problems
Ready to bring your mobile app vision to life? Three29 designs and develops custom mobile apps for B2B and growth-oriented organizations, including AEC (architecture, engineering, and construction), manufacturing, food and beverage, SaaS, legal, and other professional services.
We combine strategy, UX, design, iOS and Android development, and systems integration expertise to build mobile apps that are easy to use, connected to your existing technology, and designed to improve customer experiences and business operations.
Meet Three29’s Mobile App Development Team
We’re an award-winning design and development agency with over 16 years in business, headquartered in Sacramento, California, and Jacksonville, Florida. Our mobile app team designs and develops iOS and Android applications that connect with websites, APIs, databases, CRMs, and other business systems.
Our fully remote team is distributed across the USA, and has successfully partnered with organizations nationwide to build mobile apps that connect directly to vital systems and turn them into usable tools for scheduling, ordering, reporting, account access, and internal operations.
Cluth Top Global Agencies
Clutch Champion – Top Performing
Clutch Top Web Design Company California
Clutch Top 1000 Firms USA
Three29 Clients
Our Featured Work
Our goal was to create a custom website experience that reflects the sophistication of the Greater Sacramento brand, while restructuring the content in a way that caters to high-level decision-makers, investors, and business leaders.
In 2024, Scolaro Law, operating under the domain UsInjury.Law, partnered with Three29 for a comprehensive website redesign and SEO overhaul.
Mikuni Sushi came to Three29 to realize a new website (and mobile app) that tied their website, point-of-sale, and reservation system together.
Client Results at a Glance
200%+
Increase in Organic Visitors
153%+
Website Conversions
41%+
More Products Sold
Real Customer Reviews and Testimonials, from Companies Like Yours
What Our Mobile App Development Service Includes
Three29 provides end-to-end mobile app development, from product strategy and UX design through development, system integration, testing, launch, and ongoing support.
Mobile App Strategy & Design
Define your app’s users, features, workflows, and technical requirements, then design intuitive mobile experiences around the actions people need to complete.
iOS & Android Development
Native and cross-platform apps using modern frameworks to deliver stable, high-performance experiences on both iOS and Android.
Backend & API Integration
Connections between mobile apps and CRMs, databases, ERPs, scheduling systems, and internal platforms so users always see accurate, up-to-date information.
Offline Functionality & Data Sync
Systems that allow users to work without a constant connection, then sync data automatically when service is restored.
Business & Field Operations Apps
Effective mobile tools for inspections, reporting, approvals, data entry, job tracking, and account management that fit existing workflows.
Security, Permissions, & Data Protection
Secure authentication, role-based access, and encrypted data handling to protect sensitive business information.
Performance Testing & Optimization
Optimization for speed, battery usage, and stability.
Testing, Updates & Ongoing Support
Test apps across devices, operating systems, and network conditions, support App Store and Google Play deployment, and provide updates as technology and business needs evolve.
Who Our Apps Are For
Our mobile app clients rely on phones and tablets to run daily operations, serve customers, and manage work outside of a traditional office environment.
They often include:
- B2B organizations with field teams, technicians, sales reps, or on-site staff
- Companies that need mobile access to scheduling, orders, reporting, or account data
- Teams replacing paper forms, spreadsheets, or email-based processes
- Organizations supporting distributed, remote, or multi-location workforces
- Businesses extending internal platforms into secure mobile tools
Our team is experienced in working alongside industries including construction, engineering, manufacturing, B2B technology, food and beverage, SaaS, and legal services.
App Outcomes You Can Measure
Faster Work in the Field
Tasks like reporting, updates, approvals, and data entry occur in real time rather than after the fact.
Fewer Errors and Rework
Standardized forms, validations, and synced data reduce mistakes caused by manual entry and disconnected tools.
Real-Time Visibility
Managers and teams see job status, inventory, activity, and performance as it happens.
Higher Team Adoption
Apps are designed around how your people and clients work, making them easier to learn and to use consistently.
Reliable Performance on Any Network
Stable operation across WiFi, cellular, and low-signal environments.
Lower Support & Maintenance Burden
Well-structured mobile systems reduce ongoing fixes, patchwork solutions, and emergency rebuilds.
Three29’s Mobile App Development Process
Our mobile app development projects are structured, collaborative, and execution-focused. Every engagement includes a dedicated account manager and technical lead, supported by clear timelines, defined milestones, and ongoing communication.
1. Discovery & Use-Case Mapping
We begin by reviewing existing systems, workflows, and user roles to define how the app will be used in real environments.
2. Project Kickoff & Technical Planning
Our teams align on scope, device requirements, security needs, integrations, and delivery timelines.
3. UX Design & Interactive Prototyping
We design and test mobile interfaces through clickable prototypes and early builds to validate usability before full development.
4. Mobile Development & System Integration
Our engineers build iOS and Android applications and connect them to internal platforms, databases, and APIs.
5. Device Testing, QA, & Review
We test across devices, operating systems, and network conditions while incorporating structured client feedback.
6. Deployment, Training, & Ongoing Updates
We manage app store submissions, internal distribution, user training, and long-term version updates.
Frequently Asked Questions about Mobile App Development
Process & Collaboration
How does your mobile app development process work?
Our process includes discovery, technical planning, mobile UX design, prototyping, app development, testing, deployment, and ongoing support. Each phase includes structured reviews and client input.
Will we have visibility into development progress?
Yes. Clients receive regular progress updates, milestone reviews, and access to project documentation throughout development.
Will we work directly with your development team?
Yes. You’ll work directly with our designers, developers, and strategists during key phases, supported by a dedicated account manager who coordinates communication.
Can you work with our internal IT or development team?
Absolutely. We regularly collaborate with in-house teams on integrations, security requirements, and long-term support planning.
Do you provide documentation and training?
Yes. We deliver technical documentation and user training to support internal adoption and long-term maintenance.
Technology & Architecture
Do you build apps for both iOS and Android?
Yes. We develop native and cross-platform applications for iOS and Android based on your performance, security, and distribution requirements.
What frameworks and technologies do you use?
We work with modern mobile frameworks and backend systems, selecting tools based on scalability, device support, and integration needs.
Can the app integrate with our existing systems?
Yes. We regularly connect mobile apps to CRMs, ERPs, databases, scheduling tools, and internal platforms through secure APIs.
Do you support offline functionality and syncing?
Yes. When needed, we design systems that allow users to work without a constant connection and sync data automatically when service is restored.
How do you handle security and user access?
We implement secure authentication, role-based permissions, encryption, and data protection practices aligned with industry standards.
Timelines & Support
How long does a mobile app project take?
Timelines vary by scope and complexity. Most projects range from several months to 12 months, depending on features, integrations, testing requirements, and deployment needs.
When will we see working versions of the app?
Clients typically review prototypes, beta builds, and staged releases throughout development, not just at launch.
How is progress tracked?
We manage timelines through defined milestones, sprint planning, and structured reporting.
Do you handle app store submission and approvals?
Yes. We manage Apple App Store and Google Play submissions, compliance requirements, and update processes.
Do you offer ongoing maintenance and updates?
Yes. We provide long-term support, feature enhancements, and platform updates as operating systems and business needs evolve.
Will we own the app and source code?
Yes. Clients retain full ownership of their applications and source code.
