MOBILE APPS

Calpak USA develops both native and cross-platform mobile applications depending on your project's performance requirements and budget constraints. For hardware companion apps requiring low-latency BLE communication or platform-specific sensor access, our engineers build native applications using Swift and SwiftUI for iOS and Kotlin with Jetpack Compose for Android. When broader reach and shared codebase efficiency are priorities, Calpak USA delivers cross-platform solutions using React Native or Flutter. Our Hawthorne, California team evaluates each project's hardware integration needs, target user base, and maintenance strategy to recommend the optimal approach. Regardless of framework, Calpak USA follows platform-specific Human Interface Guidelines and Material Design standards to ensure your app feels native to each operating system and passes app store review on the first submission.

Calpak USA specializes in mobile applications that establish reliable wireless connections to embedded hardware over Bluetooth Low Energy 5.x and Wi-Fi Direct. Our engineers implement custom GATT service profiles for BLE device communication, handle connection management including background reconnection and bonding, and optimize data throughput for real-time sensor streaming and command-response protocols. For Wi-Fi-connected devices, Calpak builds local discovery mechanisms using mDNS and UDP broadcast, along with REST and WebSocket interfaces for configuration and telemetry. Because Calpak USA designs firmware and mobile software under the same roof in Hawthorne, California, our wireless protocol stacks are validated end-to-end against actual hardware during development. We also implement OTA firmware update flows within the mobile app, enabling your field teams to push verified firmware images to deployed devices securely.

Calpak USA manages the complete app store lifecycle for both Apple App Store and Google Play Store, including provisioning profiles, code signing certificates, entitlements configuration, store listing content, screenshot preparation, and compliance with each platform's review guidelines. Our engineers address common rejection triggers proactively, including privacy policy requirements, App Tracking Transparency declarations for iOS, data safety sections for Google Play, and proper background mode justifications for BLE-connected hardware apps. Calpak USA configures TestFlight for iOS beta distribution and Google Play internal testing tracks for pre-release validation with your team. We handle app review responses if clarification is requested by Apple or Google reviewers. Our Hawthorne, California team also sets up CI/CD pipelines using Fastlane and platform-specific toolchains to automate build, signing, and submission processes for efficient ongoing release management.

Calpak USA follows a structured mobile UI/UX process that begins with user research and task analysis to understand how operators, technicians, and end users interact with your hardware product in real-world conditions. Our designers create information architecture maps, user flow diagrams, and wireframes in Figma before developing high-fidelity interactive prototypes that your team can test on actual devices. Calpak USA validates designs through usability testing sessions to identify navigation friction and workflow gaps before writing production code. Our design system approach establishes reusable component libraries with consistent typography, color, spacing, and interaction patterns that accelerate development and maintain visual coherence across screens. For hardware companion apps, Calpak USA designs device status indicators, real-time data visualizations, and configuration interfaces that translate complex engineering data into clear, actionable mobile interfaces accessible to non-technical users.

Calpak USA builds mobile applications with full cloud backend integration using AWS IoT Core, Azure IoT Hub, Google Cloud IoT, and Firebase for device telemetry ingestion, user authentication, and data storage. Our engineers implement RESTful and GraphQL APIs that connect your mobile app to cloud-hosted databases, enabling fleet management dashboards, historical data analysis, and multi-user access control. Calpak USA configures real-time data pipelines using MQTT and WebSocket connections so mobile dashboards display live sensor readings, device status, and alert notifications with sub-second latency. We implement push notification systems through APNs and Firebase Cloud Messaging to alert users to threshold violations, firmware update availability, and device health events. All cloud integrations developed at our Hawthorne, California facility include token-based authentication, TLS encryption, and role-based access control to protect sensitive device and operational data.

Calpak USA provides structured post-launch support programs covering bug resolution, OS compatibility updates, security patches, feature enhancements, and app store compliance maintenance. When Apple and Google release new iOS and Android versions, our Hawthorne, California team tests your app against beta OS builds and delivers compatibility updates before public release to prevent disruptions for your users. Calpak USA monitors crash reports through Crashlytics and Sentry, performance metrics via platform analytics, and user feedback channels to prioritize maintenance work based on real-world impact data. Our support agreements include defined SLAs for critical issues affecting hardware connectivity or production workflows versus routine enhancement requests. Calpak USA also manages ongoing BLE and Wi-Fi protocol stack updates when chipset vendors release new firmware SDKs that affect your mobile-to-device communication layer. Every update follows our AS9100 and ISO 9001 change control process with regression testing before app store submission.