Custom mobile app design & engineering (iOS & Android)
Bespoke mobile applications engineered for intuitive UX/UI, smooth 60/120 FPS performance, real-time ERP/CRM integration, and guaranteed approval on Apple App Store & Google Play.
TRUSTED BY EUROPEAN AND ASIAN ENTERPRISES
Why are over 80% of mobile apps uninstalled within days?
Slow startup times, clunky user journeys, payment failures, or disconnected backend data quickly burn through your user acquisition budget. Below are the 4 most common mobile pitfalls and how Sudo solves them at the architectural level.
Challenge
Frame drops, slow cold starts, and excessive battery drain
Cluttered interfaces and high-friction user flows that kill conversion
App Store and Google Play rejections delaying market launch
Siloed mobile apps disconnected from existing ERP, CRM, and POS systems
Sudo’s solution
Sub-2-second cold start, stable 60/120 FPS rendering, and battery optimization
Sudo profiles performance on physical devices using Xcode Instruments and Android Profiler to eliminate frame drops during scrolling and tab transitions.
We optimize the application lifecycle, resolve memory leaks, implement smart image compression, and strictly govern background threads so the app runs smoothly without draining battery.
Apple Human Interface & Google Material Design tailored for thumb-zone conversion
Interfaces are crafted around Apple Human Interface Guidelines and Google Material Design, placing primary actions directly within the natural one-handed thumb zone.
Every user journey — from app launch to checkout or appointment booking — is streamlined to a maximum of 3 taps, driving higher conversion and repeat engagement.
Compliance-first engineering with guaranteed App Store & Google Play publication
We build Apple Privacy Manifests, GDPR/FADP data consent controls, Account Deletion flows, and compliant payment mechanisms directly into the codebase from day one.
Sudo’s engineering team prepares all technical review documentation and communicates directly with Apple and Google review boards until your app is officially live on both stores.
API-first architecture with real-time bi-directional ERP/CRM synchronization
We engineer backends using an API-first architecture ready to integrate directly with your existing enterprise systems — including ERP, CRM, accounting software, and in-store POS.
Inventory levels, fulfillment statuses, account balances, and customer profiles sync bi-directionally in real time via WebSockets and RESTful/GraphQL APIs without disrupting your current operations.
Featured mobile app projects engineered by Sudo
Explore real-world iOS and Android applications custom-engineered by Sudo to solve specific operational and commercial workflows for our clients.
- Finme — Personal finance & wealth management app
- BukkiGo — European salon & spa booking app
- Viec Tai Nha — On-demand home services platform
- Finme — Personal finance & wealth management app
- BukkiGo — European salon & spa booking app
- Viec Tai Nha — On-demand home services platform
Transparent custom mobile app development pricing
Clear, fixed-milestone investment covering both iOS and Android apps plus a centralized web admin portal. You receive 100% source code ownership and complete data sovereignty with zero recurring license fees.
Internal operations app
Includes both iOS & Android apps + 100% source code handover
Enterprises digitizing internal workflows, field service teams, sales reps, fleet & delivery operations, warehouse management, or specialized internal business processes.
- GPS attendance & biometric check-in: Integrated geolocation and facial recognition with anti-spoofing protection and offline data caching when connectivity drops.
- Multi-level role-based access control (RBAC): Granular permissions for viewing, editing, and approving data across departments, branches, and job roles.
- Task dispatch & instant mobile approvals: Create requests, assign field tasks, and trigger real-time push notifications for immediate manager sign-off.
- Two-way API integration with existing systems: Ready for bi-directional data synchronization with your existing ERP, CRM, or accounting software.
- Full source code & web admin handover: Includes a web administration portal and 100% source code ownership — zero monthly per-user SaaS fees.
E-commerce & customer loyalty app
Omnichannel payments & real-time POS/inventory sync
Retail chains, F&B brands, fashion labels, beauty clinics, salon chains, and healthcare providers building a direct mobile sales channel to boost customer retention and repeat purchases.
- Automated loyalty points & VIP tiers: In-store QR code scanning for point accumulation, automatic VIP tier upgrades, and personalized birthday or milestone vouchers.
- Unlimited free push notifications: Send targeted promotions, order updates, and appointment reminders directly to lock screens at zero per-message cost (replacing expensive SMS gateways).
- Frictionless European & global payments: Pre-integrated support for Stripe, Apple Pay, Google Pay, PayPal, SEPA Instant, and saved credit/debit cards with 3-tap checkout.
- Real-time omnichannel synchronization: Instant two-way sync with your e-commerce website and in-store POS terminals so stock levels and pricing match across every touchpoint.
- 100% App Store & Google Play approval guarantee: Sudo handles all technical compliance, privacy manifests, and store review communications until your app is live.
Custom platform & enterprise ecosystem
High-concurrency architecture & bank-grade security
Platform businesses (multi-vendor marketplaces, on-demand booking, ride-hailing, logistics, fintech), large distribution networks, or ecosystems serving tens of thousands of concurrent users.
- Scalable microservices & API gateway: Modular architecture allowing continuous feature rollouts and independent service scaling without downtime.
- High-concurrency real-time infrastructure: Optimized cloud cluster and WebSocket architecture built to handle traffic spikes during major commercial campaigns.
- Multi-service & digital wallet readiness: Engineered to embed sub-services, internal digital wallets, escrow workflows, or partner mini-modules within one ecosystem.
- End-to-end encryption & security auditing: E2EE data transmission, biometric authentication, GDPR/FADP compliance, and mobile penetration testing prior to handover.
- Direct solution architect involvement: Our CTO and lead architects conduct deep-dive discovery, optimize cloud infrastructure costs, and provide long-term SLA engineering support.
Have a budget under €2,000 or need a lean prototype to validate a new market idea?
Explore our Lean MVP package: focused core screens, essential workflows, fast 30-day delivery, and a clean architecture ready to scale as your user base grows.
Industry-specific mobile app solutions tailored to your vertical
Every industry has distinct user behaviors and operational workflows. Sudo’s business analysts and engineers study your vertical in depth to design mobile applications that solve your exact operational bottlenecks.
Retail & omnichannel e-commerce
Retail & omnichannel e-commerce
Streamlined mobile checkout integrated with Stripe, Apple Pay, Google Pay, and SEPA QR codes. Real-time inventory sync with your web store and POS terminals, plus automated abandoned-cart push notifications.
Real estate & property management
Real estate & property management
Built for property managers and residential developers: tenants receive digital utility invoices, pay maintenance fees online, book shared amenities, and submit photo-attached maintenance tickets directly to building management.
Finance, digital wallets & fintech
Finance, digital wallets & fintech
Engineered to strict financial security standards: Face ID / biometric login, end-to-end encrypted data transmission, instant balance notifications, and zero-latency QR peer-to-peer or merchant transfers.
F&B chains & table ordering
F&B chains & table ordering
QR table scan-to-order, automated member loyalty points and tier upgrades, delivery ordering, and direct ticket routing to kitchen and bar thermal printers.
Healthcare, clinics & appointment booking
Healthcare, clinics & appointment booking
Doctor selection and real-time slot booking, GDPR-compliant private electronic health records (EHR), encrypted lab result delivery, and automated follow-up appointment reminders.
Education & mobile e-learning
Education & mobile e-learning
Mobile learning platforms featuring DRM-protected video lectures, timed assessments, automated grading, and periodic progress reports for students and corporate training managers.
Hospitality, travel & room booking
Hospitality, travel & room booking
Real-time room availability across OTA channels, instant online booking and payment, digital key/QR self check-in, and convenient in-app e-voucher storage.
Logistics, fleet & warehouse operations
Logistics, fleet & warehouse operations
Dedicated driver and warehouse apps featuring fast barcode/QR inventory scanning, real-time proof-of-delivery updates, and live GPS route tracking.
The engineering advantage of building your app with Sudo
We do not build fragile webview wrappers or lock you into monthly rental software. Every mobile project at Sudo is engineered as an independent technology asset built for your company’s long-term growth.
True native performance — zero sluggish webview wrappers
We engineer mobile apps using proven modern frameworks (Flutter, React Native, Swift, Kotlin), harnessing native device hardware to deliver responsive, high-frame-rate touch interactions.
- Responsive 60/120 FPS rendering: Instant touch feedback and smooth scrolling across catalogs of thousands of items without frame drops.
- Full native hardware access: Deep integration with camera barcode/QR scanners, background GPS, Face ID / Touch ID biometrics, NFC, and push notifications.
- Battery & memory efficiency: Strict background thread management prevents device overheating and minimizes battery consumption.
- Adaptive multi-screen layouts: Pixel-accurate responsive layouts across compact Android handsets, latest iPhones, and tablets.
100% source code handover & complete data sovereignty
Unlike monthly SaaS app builders, Sudo transfers the complete source code and database upon completion. Your mobile platform is a permanent asset owned 100% by your enterprise.
- Complete code & repository handover: Full delivery of mobile app source code, backend APIs, database schemas, and admin credentials.
- Zero recurring license fees: One-time engineering investment with no monthly SaaS subscription or per-seat charges.
- Freedom to scale & customize: Expand features freely at any time with Sudo or transition maintenance smoothly to your internal engineering team.
- Strict data sovereignty (GDPR & FADP): All customer and operational data is hosted on your own European or private cloud servers with zero third-party data sharing.
Deep ERP/CRM integration & guaranteed store publication
Your mobile app connects seamlessly with your existing enterprise software stack, while Sudo’s engineers manage the entire Apple App Store and Google Play compliance and review process.
- Open API architecture with two-way sync: Ready to connect directly with SAP, Odoo, HubSpot, custom ERPs, accounting software, and POS systems.
- Zero-latency real-time updates: Order statuses, warehouse stock levels, and loyalty points synchronize instantaneously across all channels.
- Guaranteed App Store & Google Play approval: Sudo prepares all privacy manifests, signing certificates, and review compliance documentation until publication succeeds.
- OS upgrade & maintenance support: Ongoing compatibility updates whenever Apple or Google releases new iOS and Android versions.
Our transparent 5-step mobile app engineering process
Every project is governed by clear milestone deliverables. You can track live progress, test interactive builds on your own phone prior to sign-off, and rely on our team until your app is officially published.
Business discovery & technical architecture
Our solution architects work directly with your team to map operational workflows, target user behaviors, and integration requirements. We recommend the optimal stack (Flutter, React Native, or Native Swift/Kotlin) to balance speed, performance, and budget.
Interactive UI/UX prototyping
We create interactive Figma prototypes adhering to Apple Human Interface and Google Material Design guidelines. You test the complete user journey on your mobile device and approve every screen before coding begins.
Mobile app & API backend engineering
Simultaneous iOS and Android development using clean, maintainable code architecture. We build secure RESTful/GraphQL APIs for two-way data sync alongside push notifications and payment gateways.
Multi-device QA & performance profiling
Rigorous testing across physical iOS and Android devices of varying screen sizes and hardware tiers. We profile frame rates, memory usage, battery consumption, and offline/weak-network resilience.
App Store / Google Play launch & code handover
Sudo manages developer certificates, privacy manifests, and technical review submissions to guarantee approval on App Store and Google Play, followed by 100% source code handover and 12-month warranty activation.
Trusted by enterprise clients & global partners
With over 11 years of software engineering experience and offices in Switzerland and Vietnam, Sudo is trusted by over 1,000 enterprises, retail chains, and corporations building scalable digital products.
What our clients say about us
Read verified feedback from business owners, CTOs, and founders after launching custom mobile applications engineered by Sudo.
Ms. Thuy Linh
À La Carte — Ha Long
Ms. Trang Nguyen
Glow Nails — Singen (Hohentwiel), Germany
Or check our independent ratings on
Frequently asked questions about custom mobile app development
Answers to the most common questions from European and international enterprises regarding mobile app development costs, delivery timelines, source code ownership, and App Store / Google Play approval.
Custom mobile app development at Sudo starts from 3,200 EUR for internal operations apps and from 4,800 EUR for customer-facing e-commerce, booking, and loyalty applications. This all-inclusive investment covers both iOS and Android platforms, a centralized web admin portal, and 100% source code handover.
For startups or businesses validating a new product concept, we also offer a Lean MVP package (under 2,000 EUR) designed to launch core functionality within 30 days. Contact our team for a tailored technical estimate.
Engineering a production-ready mobile application typically takes between 4 and 10 weeks depending on business logic complexity and third-party integrations:
- Lean MVP application: 2 to 4 weeks.
- Internal operations & workforce app: 4 to 6 weeks.
- E-commerce, booking & customer loyalty app: 6 to 8 weeks.
- Complex multi-vendor platform or enterprise ecosystem: 10 to 16 weeks delivered in structured milestone sprints.
Yes — Sudo transfers 100% clean source code and perpetual IP ownership to your company.
Upon final acceptance, you receive the complete mobile app repositories (iOS & Android), backend API source code, database schemas, original Figma design files, and signing certificates. You retain full freedom to scale or maintain the system internally with zero recurring SaaS license fees.
We select the mobile engineering stack based on your specific performance requirements, hardware needs, and TCO goals:
- Flutter and React Native (cross-platform): Ideal for over 80% of commercial and enterprise apps (retail, booking, F&B, internal operations). A single shared codebase for iOS and Android reduces development cost and time-to-market by up to 40% while maintaining smooth 60/120 FPS performance.
- Native Swift (iOS) and Kotlin (Android): Recommended for applications requiring intensive 3D graphics, real-time audio/video processing, or low-level hardware/Bluetooth/NFC protocols.
Sudo guarantees full technical support until your application is officially approved and published on both the Apple App Store and Google Play.
From the start of development, our engineers implement Apple Privacy Manifests, GDPR/Swiss FADP data consent flows, mandatory account deletion controls, and compliant in-app billing rules. We prepare all submission metadata, signing certificates, and review notes, communicating directly with Apple and Google review teams until your app is live.
Yes. Every backend built by Sudo follows an API-first architecture ready for real-time bi-directional synchronization.
Your mobile app can connect seamlessly with your e-commerce website, in-store POS terminals, accounting software, and enterprise platforms such as SAP, Odoo, HubSpot, Salesforce, or custom legacy databases. Inventory counts, pricing, order statuses, and loyalty points stay synchronized across every touchpoint.
Sudo operates our European representative office in Killwangen, Aargau, Switzerland (Dorfstrasse 14, 8956 Killwangen) alongside our main R&D engineering centers in Hanoi and Ho Chi Minh City, Vietnam. This hybrid Swiss-Vietnamese model gives European clients direct local communication within CET business hours, strict GDPR & Swiss FADP compliance, and cost-effective engineering execution.
Every mobile application engineered by Sudo includes a complimentary 12-month technical warranty after launch.
When Apple releases a new iOS version or Google updates Android, our team assists with compatibility testing, SDK updates, and store patch submissions so your application continues running smoothly without interruption.
Have a custom mobile app concept or enterprise workflow to digitize?
Sudo’s lead engineers and solution architects are ready to advise on technical architecture and provide a transparent cost breakdown.
Get a tailored solution consultation
Launch your mobile app project with SUDO
Share your project goals below. Sudo’s solution architects will review your requirements and respond with a tailored technical proposal within 24–48 hours (CET).
Europe Office: Dorfstrasse 14, 8956 Killwangen, Switzerland (+41 77 530 43 73)
Hanoi Office: 3rd Floor, Dolphin Plaza (Towers 3-4), 6 Nguyen Hoang, Tu Liem Ward, Hanoi (+84 989022022)
Hanoi Office: 3rd Floor, 19 Co Van, Dong Anh Commune, Hanoi. (+84 989022022)
Nghe An Office: 14th Floor (Nghe An Petroleum Building), 7 Quang Trung, Quang Trung Ward, Nghe An. (+84 989022022)
Request a quote for mobile app development
Strict NDA protection, GDPR/FADP privacy compliance, and transparent cost optimization for your enterprise.