Citrusbug is a global mobile app development company helping startups and enterprises ship secure, high-performing iOS and Android apps that users keep coming back to. From product discovery to launch and beyond, our engineers manage the full mobile app development lifecycle so your team can focus on growth.
ISO 27001
SOC 2 Type II
GDPR Compliant
Trusted by industry leaders
Certifications and Accreditations
We design and engineer cross-platform mobile apps built around your business model, your data, and your users. Every build is shaped by a scalable mobile app architecture, a measurable scope, and the platforms your customers actually use.
Native iOS apps engineered in Swift and SwiftUI for iPhone, iPad, Apple Watch, and Apple TV as part of our iOS app development services. We build with Apple’s latest frameworks, App Transport Security, and the Human Interface Guidelines to ship apps that pass App Store review on first submission.
Native Android apps written in Kotlin with Jetpack Compose, MVVM architecture, and Material 3. We optimize for the full device fragmentation range, integrate Play Store policies into the build pipeline, and deliver apps tuned for performance and battery life.
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Single-codebase apps built in Flutter or React Native that deploy to iOS and Android from one engineering team. Ideal when speed-to-market matters or when you need to keep two platforms feature-equivalent without doubling engineering cost.
For products that don’t fit a template. We design custom architectures, integrate with your stack, and engineer for your specific scale curve. Includes UX/UI design services led by senior product designers.
On-device inference, LLM-backed assistants, recommendation engines, and computer-vision features integrated into your mobile app. Built through our AI application development practice, with privacy and latency engineered in from the start.
Internal tooling, field-force apps, sales enablement, and B2B portals designed for enterprise mobile app development. Engineered for SSO, role-based access, offline-first sync, and enterprise device management. Built to pass IT, security, and compliance reviews on the first pass.
A working, investor-ready mobile app in weeks, not quarters with a focus on MVP app development. Tight scope, clear roadmap, fast feedback loop. Designed to validate the core hypothesis quickly and de-risk the full build before you commit budget.
Migrate legacy iOS or Android apps to modern frameworks. Refactor monolithic codebases. Replace deprecated SDKs and bring your app back into store compliance, with no disruption to existing users or data.
Get a structured 30-minute call on scope, recommended stack, realistic timeline, and budget range. No pitch deck, just answers.
Book a 30-Min Scoping CallMost mobile teams build apps. We build mobile platforms that ship with intelligence baked in. Whether that means a recommendation engine inside an e-commerce app, a conversational interface inside a healthcare portal, or on-device ML for offline use cases, our engineers think about the AI layer at architecture stage, not as a bolt-on after launch.
That matters because the apps shipping in 2026 are not the apps shipping in 2022. Buyers expect intelligent search, contextual personalization, and conversational support to be native to the product. We build them that way.
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Our mobile architecture starts at the read/write patterns your traffic will generate, not at the UI. Apps are built on a loosely-coupled backend, cache-aware mobile clients, and infrastructure that scales horizontally as your install base grows from thousands to millions.
Every mobile build follows OWASP Mobile Top 10 as a baseline to ensure secure mobile app development. Code obfuscation, certificate pinning, encrypted local storage, biometric authentication, and SAST/DAST scans are part of the standard pipeline, not extras you pay for after launch.
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Citrusbug is an AI development agency. That shapes our mobile work too. We design data models, event schemas, and API contracts so an intelligence layer can be added later without re-architecting the app. Plug in on-device ML, RAG, or LLM features without rebuilding from scratch.
Different stages of an app product need different commercial structures. We work across four:
Best for clearly-scoped MVPs and v1 builds. We co-author the SOW, lock the scope, and deliver against milestones at a fixed price. For founders, this is often the first step.
Best for evolving products where scope flexes. You get a senior-heavy pod and we bill against actual time, with full transparency on burn rate, sprint outputs, and remaining backlog.
Best for funded scale-ups and enterprise programs that need a multi-quarter mobile pod under your management. We embed engineers, designers, and QA into your delivery cadence with weekly governance.
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Best for in-house teams that need specific mobile skills (Flutter, React Native, native iOS, native Android, mobile DevOps) without permanent hires. Engineers join your Jira, your stand-ups, and your code reviews.
Developing a mobile app can cost anywhere from $15,000 for a basic app to $200,000+ for a feature-rich, enterprise-level solution. The final cost depends on your app's functionality, platform, and integrations. Share your project requirements to get a precise, tailored estimate.
We start with a structured discovery: user goals, business outcomes, technical constraints, integrations, and compliance posture. Output is a written scope, a recommended architecture, and a milestone-based plan you can take to your board.
UX and UI built around the flows that drive your conversion and retention numbers. We deliver interactive prototypes, an annotated design system, and platform-specific design specs for iOS and Android engineers to ship against.
Engineering in two-week sprints with code reviews, automated tests, CI/CD on every commit, and demo builds delivered to your team. Senior architects own technical decisions; you get weekly written status and one demo call per sprint.
Functional, performance, security, and accessibility testing on real devices. We handle App Store and Play Store submission, including the policy edge cases that get apps rejected, and stay on the call through review.
Post-launch monitoring with crash analytics, performance budgets, and release-cadence management. We run iterative releases, A/B tests on growth flows, and capacity reviews as your install base grows.
Enterprise mobile buyers do not just ask if an app works. They ask how it handles a leaked credential, a stolen device, a regulator audit, and a CVE in a third-party library. Our standard mobile build includes:
OWASP Mobile Top 10 coverage on every build
ISO 27001 and SOC 2 Type II processes across the engineering organization
GDPR-aware data handling and consent workflows
HIPAA-ready architectures for healthcare apps
Code obfuscation, certificate pinning, encrypted local storage
Biometric and multi-factor authentication, where the use case calls for it
SAST and DAST in CI/CD, plus penetration testing before major releases
Signed NDAs and clear IP assignment in every contract 
Every engagement starts with a mutual NDA and a clear IP assignment clause. You own the source code, the designs, the documentation, and the deployment credentials from day one.
Milestone-based delivery with written commitments per sprint. If a milestone is at risk, you hear about it in the next status note, not at the end of the release window.
Senior architects across native iOS, native Android, Flutter, and React Native. We have engineers who have shipped apps for HSBC-scale clients and engineers who have shipped first-version MVPs for funded founders. You get the right mix for your build.
Manual and automated testing on real device farms. Functional, performance, accessibility, and security tests run on every release candidate. Bug-free is not the goal; predictable quality is.
Mobile apps that are ready for intelligence: recommendation engines, conversational UI, on-device ML, embedded RAG. The AI layer is designed in, not retrofitted in.
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Most of our clients stay with us past launch. Citrusbug’s mobile pods provide ongoing release cadence, OS version upgrades, third-party library patching, and feature evolution. The team that builds your app is the team that maintains it.
Their agile way of working, competence, and friendliness are impressive.December 7, 2024
Citrusbug Technolabs handles a data extraction project for an education company. They're also responsible for managing an AI generation project for the client.
Citrusbug Technolabs has laid out and followed a clear project outline and consistently met deadlines. The team communicates well and demonstrates a strong understanding of the client's vision and goals. Their agile approach, high level of competence, and personable approach stand out.
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Their communication and ability to capture exactly what I was asking for were impressive.November 14, 2024
Citrusbug Technolabs built an automated system for a veteran medical company. The system needed to collect and store user data, generate customized letters based on surveys, and use AI to summarize reviews.
Citrusbug Technolabs delivered a functional automated system that successfully organized the client's records and auto-generated statements. The team was quick to respond, addressed all roadblocks, and communicated effectively. Overall, their ability to understand the client's needs stood out.
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They were very calm and talented, and they did bring some of their own ideas.January 28, 2025
Citrusbug Technolabs has developed an MVP for a freight and capacity marketplace. The team has created three different interfaces for three market segments.
Citrusbug Technolabs has successfully developed an effective MVP. The team has delivered the project on time and almost within budget. Moreover, their responses have been timely. Overall, the team has been calm, talented, and innovative. This has led to the client's satisfaction.
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What stood out most about them was their personalized approach and sense of ownership in every aspect of the project."February 27, 2024
Citrusbug Technolabs built a Flutter cross-platform mobile app for an education company. They also developed two web apps and an admin panel and provided DevOps support for the client's infrastructure.
Citrusbug Technolabs' support successfully boosted the client's user engagement by 8x, resulting in an 85% retention rate. The reliable team demonstrated a dedication to delivering on time and promptly responding to concerns and adjustments. Their personalized, client-centric approach stood out.
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They didn't like the phrase "impossible to do", which made them very solution-oriented.February 19, 2024
A healthcare company hired Citrusbug Technolabs to design and develop a user-friendly application. The team provided tailored assistance to meet the client's requirements.
Citrusbug Technolabs successfully delivered an application that was ready for market. The team was highly professional and well-organized; they stayed focused throughout the engagement and were receptive to changes. Overall, they stood out for their trustworthiness and commitment to excellence.
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They're 100% on time and transparent throughout each stage of the project.February 24, 2024
A financial technology company has hired Citrusbug Technolabs to build a custom web application. The team handles the development and design of the app.
The project is ongoing, but the client has been satisfied with Citrusbug Technolabs' services. The team is very professional — they always respect timelines and provide regular updates to ensure everyone's on the same page. Also, their transparent approach makes them a trustworthy partner.
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"I do believe they are exceptional at where they stand."
Citrusbug Technolabs took on a mobile app development project for a Singapore-based development house. They were provided with UX designs to execute. Currently, they're finalizing and fine-tuning the product.
Citrusbug Technolabs contributed to the successful launch of the product, which has garnered over 10,000 users in just three months. The product has also received support from investors. They consistently followed-up with their progress and delivered at a speedy rate. The team is truly stellar.
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Read MoreA mobile app development company designs, builds, tests, deploys, and maintains apps for iOS, Android, and cross-platform environments. The good ones also handle product strategy, UX research, architecture, backend infrastructure, store submission, and post-launch support, not just the code.
A focused MVP takes 8 to 14 weeks. A mid-complexity app takes 4 to 7 months. A full enterprise mobile app with custom backend, integrations, and compliance work runs 7 to 14 months. The fastest way to get a real timeline is to share your scope.
Roughly $20,000 to $50,000 for a simple app, $50,000 to $120,000 for mid-complexity, and $120,000+ for enterprise builds. The big cost drivers are scope, integrations, design complexity, and compliance.
Native (Swift / Kotlin) wins when you need maximum performance, deep OS integration, or platform-specific features. Cross-platform (Flutter, React Native) wins when speed-to-market, cost, and a single codebase matter more. We help you make the call based on your roadmap, not on what is easier to sell.
Yes. Source code, design files, infrastructure credentials, and IP are yours from day one. NDA before discovery. No lock-in clauses.
Always. NDA goes out before the first discovery conversation.
ISO 27001 certified, SOC 2 Type II audited, and GDPR aligned. We engineer HIPAA-ready healthcare apps and have shipped PCI-conscious FinTech mobile apps. Every project gets a secure architecture review before code is written.
Yes. We integrate with CRMs, ERPs, payment gateways, identity providers (SSO, OAuth, SAML), analytics platforms, and any custom backend. API contract design is part of our architecture phase.
We offer post-launch support tiers covering bug fixes, OS-version updates, performance monitoring, security patches, and feature work. Most clients stay on a monthly retainer through year one.
Yes. We run a code audit and architecture review first, give you a realistic remediation plan, and then either rescue the existing codebase or rebuild what is not salvageable. We are honest about which one applies.
Yes. LLM-backed assistants, computer-vision features, recommendation engines, voice interfaces, and on-device inference are all part of our standard mobile capability.
The mobile platform shifted in the last 24 months. A few things every product team should be planning for:
