Professional Mobile App Design
Mobile app development with Native UI/UX standards, smooth 60/120 FPS, thorough RAM management & battery saving, with a 100% commitment to supporting App Store & Google Play approval.
TRUSTED BY LEADING CORPORATIONS AND BRANDS IN VIETNAM
Why do 80% of apps get uninstalled within 3 days?
Lag, hard-to-use UI, battery drain and small bugs waste your user acquisition cost (CAC). This is how Sudo sets the standard for premium Mobile Apps.
Challenges
Laggy app, slow loading and draining battery / RAM
Cluttered UI/UX that is hard for users to navigate
Rejected by the App Store / Google Play
Closed backend that does not sync with ERP / CRM
Solutions
Smooth 60/120 FPS performance, careful RAM management and thorough battery saving
Lag, heat and battery drain are the "number one enemy" that make over 80% of users uninstall an app within a few days. At Sudo, every screen and user flow is carefully measured with Android Profiler & Xcode Instruments to completely eliminate frame drops below 60 FPS.
We optimise the App Lifecycle, eliminate memory leaks, lazy-load large data lists and compress image assets by pixel density (1x, 2x, 3x). Apps cold-start in under 1.5 seconds and background tasks are strictly controlled to save as much battery as possible on users' devices.
100% unique design following Apple Human Interface & Google Material You
An excellent app is not only beautiful but must also feel natural and convenient to tap and swipe. Sudo's UI/UX designers approach every problem from the ergonomics of the thumb-friendly zone, placing buttons and navigation bars exactly within the natural reach of mobile users.
We strictly follow Apple's Human Interface Guidelines and Google's Material Design 3, combined with subtle micro-interactions that guide user behaviour. As a result, the journey from opening the app to completing a transaction takes no more than 3 taps, significantly improving the Retention Rate and order revenue.
A rigorous review process with a 100% commitment to getting you onto the App Store & Google Play
Being rejected by Apple or Google is the biggest risk that delays projects and misses business opportunities. With extensive experience publishing many apps on the App Store and Google Play, Sudo has built a quality control process that complies 100% with the strict guidelines of both tech giants.
We handle every technical requirement: Privacy Manifest declarations, transparent permission requests (Camera, Location, Push Notification), correct In-App Purchase flows and in-depth technical explanation documents. Sudo works directly with your team and responds to Apple/Google reviewer requests until the app is officially published.
Open API Gateway architecture with real-time two-way sync with ERP/CRM
A mobile app cannot operate as an isolated island. Sudo designs the backend following API-First and Microservices principles, providing a high-speed API Gateway ready for two-way connections with every management platform: ERP (SAP, Odoo), CRM, POS, accounting and logistics systems of the business.
We use WebSocket and distributed message brokers (RabbitMQ / Kafka) to sync data in real time: from balance changes, inventory and driver GPS locations to order status, instantly and without delay. Businesses can easily scale to millions of users without worrying about data integrity.
Featured Mobile App projects by Sudo
Explore cross-platform and native mobile apps running reliably on millions of iOS and Android devices, delivering a smooth 60/120 FPS experience to users.
- Velocity Retail retail & e-commerce app
- CRM Mobile Pro enterprise & CRM app
- VIP membership & Loyalty rewards app
- Sudo Pro e-wallet & Fintech (Face ID)
- Multi-service Super App ecosystem
- Coffee chain & F&B auto-ordering app
- Logistics & warehouse barcode scanning app (Android)
- MedCare healthcare booking & care app
Mobile App development pricing
Every mobile app is built with a premium technology product mindset: 100% exclusive interface, hardware optimised for 60/120 FPS, OWASP Mobile security and 100% source code handover.
Internal Management App
All-inclusive investment • 100% source code handover
Businesses that need to digitise internal operations, GPS timekeeping, human resources (HRM), customer management (CRM), warehousing and internal delivery.
- GPS & Face timekeeping: Accurate positioning against location fraud, smooth check-in even when offline.
- Dynamic multi-level permissions (RBAC): Strict access control by department, branch and position.
- Real-time reports & notifications: Instant alerts for new tickets, tasks or spending approval requests.
- 100% Full Source Code handover: The business owns it forever, with no monthly software rental fees.
- Ready ERP & CRM integration: Two-way connection via RESTful API with internal servers.
Sales & Loyal Customers
All-inclusive investment • Integrated sales & Loyalty ecosystem
Retail chains, F&B chains, fashion and beauty clinics that want to retain customers, drive repeat purchases and build an exclusive sales channel.
- Loyalty & Points system: Manage VIP tiers, scan QR codes to earn points at the counter and personalise birthday vouchers.
- Smart Push Notifications: Automatically send push notifications by customer behaviour segment with high open rates.
- 1-tap shopping & payment: Apple Pay, Google Pay, VNPAY, MoMo, VietQR integration and real-time order tracking.
- Smooth 60/120 FPS performance: Ultra-fast product catalogue loading, offline cart saving when the signal drops.
- Full support for App Store / Google Play release: Committed approval support and companionship throughout the app lifecycle.
Super App & Large Systems
Business analysis • High-load Microservices architecture
Large corporations, Fintech platforms, on-demand delivery, ride-hailing or multi-service ecosystems serving millions of concurrent users (high CCU).
- Microservices & API Gateway architecture: Flexible modules that allow unlimited expansion without affecting the whole system.
- High Concurrency handling: Automatic load balancing on Kubernetes, optimised real-time sockets for hundreds of thousands of CCU.
- Multi-service integration (Mini-apps): Easily embed satellite services, e-wallets and internal payment gateways.
- OWASP Mobile Top 10 security: End-to-end encryption (E2EE), anti reverse engineering and Face ID biometric data protection.
- Lead engineer support: A Solution Architect personally designs the architecture and provides 24/7 technical support.
A start-up, or need an MVP app to raise funds / validate the market within 30 days?
Try the Rapid Mobile MVP package — cost-optimised, fast delivery and ready to scale.
Mobile App Design by industry and sector
Every industry has its own one-tap behaviour and management processes. Sudo delivers Native-standard Mobile App solutions that help businesses break through in revenue.
Retail & E-commerce
Retail & E-commerce
Smooth 1-tap shopping at 60/120 FPS. Apple Pay / MoMo / VNPAY integration, offline cart saving and automatic Flash Sale push notifications to retain customers.
Real Estate & Residents
Real Estate & Residents
Smart resident app: open doors with Face ID/Bluetooth, receive notices from building management, pay service bills automatically and explore a 3D model to choose an apartment.
Finance & Fintech
Finance & Fintech
Face ID biometric security and E2EE end-to-end encryption to OWASP Mobile Top 10 standards. Ultra-fast transfers via VietQR and real-time balance tracking.
F&B Chains & Ordering
F&B Chains & Ordering
Order at the table (Scan to Order), earn points for free drinks automatically (Loyalty), order delivery and find the nearest branch on a GPS map.
Healthcare & Appointments
Healthcare & Appointments
Book doctor appointments by time slot, electronic medical records, secure test result lookup and smart medication reminders via Push Notification.
Education & EdTech
Education & EdTech
Online learning app with offline video downloads, timed multiple-choice exams and automatic learning progress notifications for parents.
Travel & Booking
Travel & Booking
Hotel check-in with digital keys, offline GPS travel maps and flight tickets / vouchers stored in Apple Wallet & Google Wallet.
Logistics & Transport
Logistics & Transport
Driver app with AI-optimised route navigation, Barcode/QR scanning with the phone camera, real-time GPS order tracking and electronic e-POD signatures.
Technical standards of a professional software company
No cheap web-wrapping tools (packaged Webviews). Every app at Sudo is built with the world's most advanced mobile technologies, optimised for hardware and with a 100% commitment to store approval.
Smooth 60/120 FPS performance, optimised RAM & battery saving
Leading mobile frameworks combined with optimised Native Code. Apps run smoothly even on mid-range devices, with no stutter when scrolling through millions of products.
- Cross-platform & Pure Native: Save 40% of costs with Flutter/React Native, or Native Swift & Kotlin for tasks that need deep hardware access.
- Stable 60 - 120 FPS: App cold start under 1.5s, smooth transitions with no dropped frames.
- Strict memory management: Eliminate memory leaks and manage background tasks to save as much battery as possible.
- 100% device adaptation: Optimised display ratios from iPhone Dynamic Island to foldable Android flagships.
Real-time connection, instant data sync without delay
A powerful backend handling tens of thousands of requests per second. Smart, personalised Push Notifications increase user engagement by up to 300%.
- Smart Push Notifications: Firebase Cloud Messaging (FCM) & Apple APNs integration for instant segmented notifications.
- High-speed API Gateway architecture: Handles heavy load and compresses payloads to save 4G/5G data and speed up loading.
- WebSocket Realtime Sync: Update order status, GPS location and live chat without reloading.
- Offline-First Architecture: Secure caching with SQLite/Realm for smooth use even without signal.
Biometric security and a 100% App Store / Google Play approval commitment
Strict compliance with OWASP Mobile Top 10 security standards and the toughest rules of Apple's Review Guidelines and Google Play Policy.
- OWASP Mobile Top 10 security: E2EE encryption, SSL Pinning against eavesdropping, anti reverse engineering and Jailbreak/Root detection.
- Biometric authentication: Face ID, Touch ID and multi-factor fingerprint integration that meets banking security standards.
- Standard App Store & Google Play review process: Clear permission documentation and full support with technical policy explanations.
- 100% Full Source Code handover: Signing certificates (Keystore / Certificates) and the Git repository are handed over for the business to own forever.
5 steps Mobile App development process
Every stage of mobile app development is managed with clear acceptance milestones, tested on real devices, and we stay with you until the app is successfully published on the stores.
Survey & architecture consulting
Analyse the business problem and mobile user behaviour, and advise on the best technology choice (Flutter, React Native or Native Swift/Kotlin).
HIG & Material UI/UX design
Build a 100% interactive Prototype in Figma following Apple Human Interface & Google Material You, optimised for the thumb zone and one-tap experience.
App development & API Gateway
Clean source code following Clean Architecture, secure API Gateway connection, FCM/APNs Push Notification integration and 60/120 FPS optimisation.
QA Device Matrix & OWASP testing
Real-world testing on dozens of iOS & Android models, OWASP Mobile security review, battery consumption, RAM leak and frame smoothness checks.
App Store & Google Play review & handover
Package signing certificates, full support to pass Apple App Store & Google Play review, 100% full source code handover and 24/7 warranty activation.
Featured clients and partners
Over 11 years, Sudo has been proud to be chosen by more than 1,000 businesses, retail chains and leading corporations in Vietnam on their journey to build sustainable digital platforms.
What Our Clients Say About Us
Hear real feedback from business owners, CTOs and founders after launching mobile apps developed by Sudo.
Technology & Marketing Director
Real Estate & Materials Group
CEO & Founder
Technology Equipment Retail Chain
E-commerce Operations Manager
Fashion & Wholesale Brand
Business Development Director
International Trading Company
Answers to questions about Mobile App Development
The most common questions from businesses about technology, costs, the App Store / Google Play review process and warranty policy.
Sudo recommends technology based on each business's specific needs:
- Flutter & React Native (Cross-Platform): The best solution for more than 85% of today's apps (Retail, Loyalty, Internal management, F&B...). Saves up to 40% of development cost and time by sharing one codebase for both iOS and Android, while still delivering Native-standard 60/120 FPS performance.
- Native Swift (iOS) & Kotlin (Android): For apps with complex graphics or deep hardware access (Bluetooth BLE, AR/VR, real-time video processing, specialised audio algorithms).
Sudo commits to supporting you 100% until the app is successfully approved on the stores. We strictly follow Apple's App Store Review Guidelines and Google Play Developer Policy from the interface design and permission request (Privacy Manifest) stage. Sudo's engineers handle everything directly: creating signing certificates (Certificates, Provisioning Profiles, Keystore), setting up the store listing, submitting builds and providing technical explanations to Apple/Google reviewers.
These fees are paid directly to Apple and Google according to their global price lists:
- Apple Developer Program: 99 USD/year (for Individual or Organization accounts). Businesses with a D-U-N-S number can register an organization account under their own brand.
- Google Play Console: a one-time fee of 25 USD (owned for life).
Sudo guides you step by step through preparing legal documents, registering a D-U-N-S number and paying for the business's own developer accounts.
Yes, fully synchronised in real time. All Sudo apps are built with an API-First architecture. The mobile app connects seamlessly via RESTful API or GraphQL with your existing website, POS sales software, CRM, ERP (SAP, Bravo, Fast, Odoo) or accounting software. Order, customer and inventory data always stays consistent in both directions between web and app.
Yes, 100% clean source code and permanent ownership. Sudo says "NO" to solutions that hide source code or charge per-user subscription fees (user licenses). On acceptance, Sudo hands over the entire Git Repository, the Frontend App source code (iOS/Android), the Backend API source code, the database schema, the original Figma design files and the app signing certificates. Your in-house technical team is fully independent to develop and maintain it long term.
Average delivery time is 4 to 10 weeks, depending on the complexity of the features:
- Internal Management & Enterprise App: About 4 - 6 weeks.
- Sales & Loyalty App: About 6 - 8 weeks.
- Super App, large systems or multi-service Fintech platforms: About 12 - 20 weeks.
Sudo is committed to long-term technical support. We provide a free technical warranty for at least 12 months (or lifetime warranty when using Cloud infrastructure operated by Sudo). When Apple releases a new iOS or Google releases a new Android, Sudo checks compatibility, updates the SDK, recompiles a new build and helps you publish the update to the stores as quickly as possible.
Does your business have a unique app idea to bring to life?
Sudo's lead engineers and solution architects are always ready to advise on the technical approach and the most cost-effective budget estimate.
Get a tailored solution consultation
Start your Mobile App project with SUDO
Tell us about your needs. Sudo’s solution architects will get in touch to assess your project and recommend the best technical approach within 24-48 hours.
Hanoi Office: 3rd Floor, Dolphin Plaza (Towers 3-4), 6 Nguyen Hoang, Tu Liem Ward, Hanoi.
Hanoi Office: 3rd Floor, 19 Co Van, Dong Anh Commune, Hanoi.
Nghe An Office: 14th Floor (Nghe An Petroleum Building), 7 Quang Trung, Quang Trung Ward, Nghe An.
Europe Office: Dorfstrasse 14, 8956 Killwangen, Switzerland.
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