Custom Mobile App
Development Services

We design, build, and support custom mobile apps for startups and enterprises: native iOS and Android, React Native and Flutter, and the backend behind them. Built by senior engineers who have shipped mobile products since 2012.

Custom mobile app development services by Eastern Peak

As a mobile app development company, Eastern Peak builds custom iOS, Android, and cross-platform apps for startups and established businesses. Our mobile app development services cover the full cycle: product discovery, UX/UI design, engineering, QA, release, and long-term support. You work with an in-house team that has been shipping mobile products since 2012, and the engineers who scope your app are the ones who build it.

Custom mobile app development at Eastern Peak means the app is designed around how your business runs. We match the technology to the product’s goals and budget, and we lay out the real cost difference between native and cross-platform before you commit. The team integrates the app with your backend and APIs, connects payments, maps, analytics, and hardware where the product calls for them, and takes the release through App Store and Google Play review. Every engagement starts with an NDA and ends with the complete source code in your hands, along with the design files and documentation.

2012building mobile products since
250+engineers in-house
7.5 Yaverage team experience
5%of interviewed candidates hired
120+companies served
98%customer satisfaction rate

Mobile apps we develop

We provide mobile app development solutions of any complexity, for any platform, matched to your business domain and budget. That covers a first MVP on a single platform, a cross-platform product aimed at both stores, and enterprise-scale mobility with the integrations and security a large organization requires.

Native iOS apps

Swift and SwiftUI applications designed specifically for iPhone and iPad. Native development gives direct access to Apple’s hardware and services: Apple Pay, HealthKit, ARKit, on-device machine learning. The result is the performance and interface quality iOS users expect.

Hire iOS developers

Native Android apps

Kotlin and Jetpack Compose apps that feel at home on every Android device that matters to your users, tested across the fragmented device and OS landscape rather than on one reference phone.

Hire Android developers

Cross-platform apps

One codebase, both stores. We build with React Native and Flutter when speed to market and budget matter more than platform-specific depth, and we will tell you honestly which route fits your product.

Cross-platform development

Enterprise mobile apps

Field operations, logistics, sales enablement, and internal tools, integrated with your ERP, CRM, and identity systems. Secure mobility that your IT department signs off on.

Enterprise portfolio

IoT-connected apps

Apps that talk to hardware: BLE devices, wearables, vehicles, and smart sensors with real-time telemetry. Connected products have been an Eastern Peak specialty for over a decade.

IoT development

App modernization

Rescue and rebuild for aging apps: new OS versions, performance and stability work, redesigns, and migration off discontinued frameworks, without losing your users or your data.

Legacy modernization

Mobile app features we build

The features we build most often across mobile products, from sign-in and payments to offline sync, device integrations, and on-device AI. Most apps are a combination of these plus the part that is specific to your business.

Accounts, roles & admin

Who gets in, what they can see, and the back office your own team runs the product from.

Email and social sign-inFace ID / fingerprint loginSSO and SAMLRole-based permissionsGuided onboardingProfile and settingsWeb admin panelUser and order managementAudit logs

Native or cross-platform: which fits your product?

This is the first technical decision every mobile project faces, and it shapes the budget, the timeline, and the team. There is no universally right answer, only the right answer for your product. Here is how we advise clients to think about it.

Native (Swift / Kotlin)Cross-platform (React Native / Flutter)
Best whenPerformance, deep hardware access (BLE, sensors, camera pipelines), or platform-specific UX is criticalSpeed to market and budget matter most, and requirements are similar on both platforms
BudgetTwo codebases, roughly 1.5–1.8× the cost of one cross-platform build for the same scopeOne codebase for both stores, the most cost-efficient route to full market reach
Typical productsIoT-connected apps, AR features, real-time media, demanding enterprise securityMVPs, content and commerce apps, on-demand marketplaces, internal business tools
Long termMaximum control over each platform’s new capabilities on day oneFaster iteration, with occasional native modules where the framework needs help

We build both, so our recommendation is driven by your product, not by our stack. During the free consultation we will lay out the honest cost difference between the two routes for your specific feature list, and say which one we would pick if it were our money.

Technologies we use for mobile development

We choose the stack for your product’s requirements, not the other way around, and we work only with mobile technologies actively maintained by Apple, Google, and their platform vendors.

iOS

SwiftSwiftUIUIKitObjective-CwatchOSiPadOS

Android

KotlinJetpack ComposeJavaAndroid SDKWear OS

Cross-platform

React NativeFlutterDartTypeScript

App backends & APIs

Node.jsPythonGoRESTGraphQLFirebaseAPNs / FCM

Device & connectivity

BLECore BluetoothMQTTWebSocketsCore Location

AI features we build into mobile apps

AI belongs in the product, not just in the pitch. These are the capabilities we design, train, and integrate into mobile apps, using your data and running inside your controls.

Conversational assistants

In-app chatbots and support agents that answer routine questions, guide users through flows, and hand off to a human when it matters.

Personalization & recommendations

Models that read in-app behaviour to surface the right content, product, or next action, lifting engagement and retention.

Computer vision

Document capture, scanning, and object or image recognition, straight from the phone camera.

Voice & speech

Transcription, voice commands, and real-time translation for hands-free and accessible experiences.

Predictive features

Forecasting demand, churn, delivery times, or maintenance windows, so the app tells users what happens next.

Fraud & anomaly detection

Models that flag suspicious activity in payments, sign-ins, and account changes before it costs you.

On-device AI

Inference that runs on the phone, so sensitive data never leaves the device and features keep working offline.

Generative content

Drafting, summarising, and image generation built into the product, with your guardrails around it.

How we deliver your mobile app

From gathering requirements to developing a mobile app to launching it on the market, we will guide you through all the steps of a mobile app development process, with a dedicated project manager as your single point of contact and regular demos at every stage.

1

Functional specification

2

UX/UI, graphic design

3

Mobile app development

4

QA and bug fixing

5

Technical and marketing support

You own the code, and you sign off at every stage.

  • Step 1.

    Functional specification

    This is a starting point in the development of your future product. It helps define a clear vision of the product, gather the requirements, define the first set of features to implement, create use cases, user flows, etc., keeping in mind customers needs and your goals.

    Learn more
  • Step 2.

    UX/UI, graphic design

    At this stage we will provide you with the best interface that delivers the experience your users want when interacting with your product. You will be able to not only see your product’s look and feel, but test every feature before implementing it.

    Learn more
  • Step 3.

    Mobile app development

    We will develop your mobile product using modern coding standards, programming languages, proven technologies and approaches according to the aim of the project, its size and budget to ensure that your product works quickly, reliably and to scale.

    Learn more
  • Step 4.

    QA and bug fixing

    We apply both manual and automated testing to all digital products we build to verify that the code is bug-free, everything works as planned and the overall performance of the product is of the highest level before it goes live.

    Learn more
  • Step 5.

    Technical and marketing support

    After your product is launched we are still here for you to provide you and your users with technical and marketing support as long as you need it. This may include product’s performance monitoring, ongoing upgrades and tuning, SEO and App Store optimization advice, etc.

    Learn more

How long mobile app development takes

Timelines below are what our own projects actually run, measured from the start of the specification to a release in the stores. The three drivers are feature scope, the number of platforms, and how much backend and integration work sits behind the screens.

Project sizeTypical timelineWhat that covers
Simple app or MVP1.5–2 monthsThree to five screens, one platform, a focused feature set, and the backend it needs to run.
Mid-level product3–5 monthsUser accounts, API integrations, payments, push notifications, an admin panel, and both platforms.
Large-scale product6–12 monthsReal-time features, AI or machine learning, AR, IoT connectivity, multi-tenant architecture, and enterprise integrations.

Roughly how long would yours take?

Five questions, and you get the band your project most likely sits in. A starting point for the conversation rather than a quote.

How you can work with us

01Managed project

We take full responsibility for delivery, meaning scope, team, timeline, and quality, and you work with a single dedicated project manager. Fixed-price works best here for well-specified MVPs.

Managed projects
02Team extension

Our mobile engineers join your existing team and your processes, hand-picked for your stack. Time-and-materials fits products that will evolve as you learn from users.

Team extension
03On-demand specialists

Designers, QA engineers, or DevOps added to either model exactly when a project phase needs them, with no idle seats on your invoice.

On-demand services

Some of our mobile app projects

Cobra Connect

A remote control and monitoring of your car

A mobile application to control the operations of a car such as opening and closing doors of the car, detecting the car location and others.

The car has a special box containing an alarm system, with internet connectivity. The car can be controlled directly from the mobile phone, with real time information being sent to and from the cloud.

Cobra Connect project
  • Car engine status
  • Trip reports
  • Open and close doors of the car
  • Detecting car location

FixitJoe

On-demand repair services for households and businesses

Quick and easy ordering of on-demand repairmen. Real-time monitoring and location tracking of the repairman’s route to their destination. In-app payments.

FixitJoe project
  • Order top-level professionals with a rating based on a discrete algorithm developed by Eastern Peak.
  • Invite a repairman into your home without any concerns regarding their professionalism, reliability and skills.
  • Track the repairman’s route and location in real time, and pay via the mobile app.

Gett

A global taxi service, #1 for on-demand corporate transportation globally driving half the Fortune 500

Cloud-based process management platform to manage and analyze multiple consumer data. A customized reporting dashboard with extensive data visualization and smart analytics.

#1 in Europe, Gett is available in 100 cities worldwide, including New York, London, and Tel Aviv. In London alone, more than half of all black cabs are running on Gett.

Gett project

Goldfarb Properties

The easiest way to view rental apartments

A mobile application that allows you to find an apartment you’re interested in and add the key to go view it on your schedule.

No additional coordination needed. With the phone as the key and all the apartment information in the palm of your hand you’ll have everything you need to make a good decision and save money in the process.

Goldfarb Properties project
  • Detailed apartment profile
  • Access to approved apartments with a generated key for a smart lock
  • Geofencing: check in if you are close to building
  • Push notifications for tenants if visitor has entered an apartment
  • Online doors monitoring

Wiliot

Battery-free Bluetooth technology – connecting assets in the physical world to the cloud

An application that detects which beacons are around you. Tag data can be accessed from the Wiliot cloud through a RESTful interface. The cloud ensures data remains secure, private and authentic, and generates actionable information about: temperature, movement and pressure/weight.

Wiliot project

Motshelo Mobile

A smart and secure application for personal short term saving and lending

A mobile application where users can save money, lend and borrow to/from fellow application users, find people to trade with, create groups and manage their motshelo accounts (deposit, withdraw and transfer).

Motshelo Mobile project
  • Get access to cash through VISA Card and all major retail shops
  • Generate summary reports on all transactions
  • Track individual savings, trades, group’s financial status

Our clients

Success Stories

Whether you are looking to modernize your legacy systems or to entirely transform your business by exploiting advances in technology, we are your one-stop shop in agile digital transformation.

Green coffee sourcing
company leverages cloud.

Learn more

Parcel delivery company
transforms customer experience.

Learn more

Big data boosts foodservice market intelligence.

Learn more

Team extension for
event success platform.

Learn more

European Commission brings green initiatives through AI.

Learn more

Dedicated team for a learning management system.

Learn more
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Mobile app development for your industry

Every industry brings its own integrations, regulations, and user habits. We have built mobile products across these domains, and each link leads to what we do in that field.

Banking & finance

Mobile banking, payments, wallets, and trading apps built with security and compliance first.

Fintech development

Automotive

Connected-car apps, telematics, and fleet solutions, including Cobra Connect above.

Automotive software

Marketplaces

Two-sided platforms with search, matching, payments, and reviews.

Marketplace development

On-demand economy

Uber-like apps for services, delivery, and logistics with real-time tracking.

On-demand apps

eLearning

Mobile LMS, course platforms, and learning apps for schools and businesses.

EdTech development

Food & restaurant

Ordering, delivery, loyalty, and restaurant management apps.

Restaurant software

Security and compliance practices

Mobile apps carry credentials, personal data, and often payment details on a device you do not control. We treat that as an architecture problem, not a checklist at the end.

  • EncryptionPlatform keystore at rest, TLS in transit, and certificate pinning where the threat model calls for it.
  • AuthenticationOAuth 2.0 and platform biometrics rather than home-grown schemes, with tokens in the Keychain or Android Keystore, never in shared preferences or plain files.
  • Dependency auditingThird-party libraries checked for known vulnerabilities and kept current, because most real-world mobile breaches arrive through a library rather than your own code.
  • Store review compliancePrivacy manifests, data-safety declarations, and permission justifications handled during development instead of discovered at submission.
  • GDPR by designData minimization, explicit consent, and deletion that actually deletes.
  • Industry requirementsWhere your industry adds requirements such as PCI DSS or HIPAA, we build to them and document what we did.

What our clients say

4.8 / 5★★★★★

Verified reviews on Clutch →

  • Quality4.7
  • Schedule4.8
  • Cost4.5
  • Willing to refer4.9

Every review on our Clutch profile comes from a client Clutch interviewed directly, and the scores below are theirs, not ours.

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REVIEWS

We wanted to enhance our shipping solutions by migrating our desktop-based platform and its users to a new web application. Good KPIs met our expectations, generating plans for future collaboration with Eastern Peak.

We had a development challenge, as well as a business one. We needed quality people quickly, so we decided to approach Eastern Peak. The results were excellent and we were able to exploit the full potential of the IoT.

Eastern Peak assumed responsibility for their results and never tried to deflect it. They stood behind their promises and were very pragmatic. We have received input on app development as well as on our general business model, which helped a lot.

We needed to find people who were experienced specifically with startup schedules. Most of the people I’ve worked with had experience of five or six startups, and they’re in their mid-20s. These guys have a good reputation, and I just got very lucky to work with them.

They gave me the knowledge, expertise, and experience I needed to launch everything from the beginning and to support it further. They’re like a partner in terms of thinking and creating new concepts, new features, and new ideas.

How we use AI in our development process

At Eastern Peak, we use AI to make mobile app development smarter, faster, and more adaptive to user needs. AI supports our engineers without replacing them, helping us optimize UX, improve app reliability, and accelerate time-to-market. In our mobile projects, AI helps us:

Personalize user experience

AI analyzes user behavior to fine-tune content, suggest next actions, and personalize the app interface, increasing engagement and retention.

Enhance push strategies

We use AI to time and target push notifications more intelligently, reducing user fatigue and increasing conversion rates.

Support cross-platform development

AI-driven tools help our team maintain consistency and performance across iOS and Android, reducing redundant work.

Predict crashes and anomalies

Integrated AI tools analyze app behavior in real time to flag unusual patterns and help us proactively fix issues before users notice.

With AI augmenting our development workflow, we deliver apps that are more resilient, better optimized, and tailored to user expectations, all without losing the human touch in product thinking and execution.

Your idea and your data are protected

NDA from day one

We sign a non-disclosure agreement before the first detailed call if you wish, and the option is right in the form below. Your concept, data, and business details stay confidential.

The code is yours

Full intellectual property transfer is our standard, not an extra line item. Source code, design files, and accounts are handed over as we go, so there is nothing to reclaim at the end.

Transparent delivery

A dedicated project manager, regular demos, and honest reporting when something slips, because you cannot plan around a status that is always green.

FAQs on mobile app development

1. What types of mobile apps do you develop?

We build native apps for iOS (Swift, SwiftUI) and Android (Kotlin, Jetpack Compose), cross-platform apps with React Native and Flutter, enterprise mobile solutions, IoT-connected apps, and modernization of existing applications. Most projects also include the backend, admin panel, and integrations behind the app, which we build in the same team.

2. How much does it cost to build a mobile app?

The cost of mobile application development varies greatly depending on the app’s complexity, features and functionality, and your chosen platform (iOS, Android, or both). Eastern Peak has extensive experience in developing apps for various industries, and we can provide you with clear estimates to help you align our mobile app development services with your business strategy.

3. How long does it take to build a mobile app?

A simple app or MVP takes 1.5 to 2 months, a mid-level product 3 to 5 months, and a large-scale app 6 to 12 months, measured from the start of the specification to a release in the stores. The main timeline drivers are feature scope, the number of platforms, and the amount of backend and integration work. App Store and Google Play review adds a few days at the end, which we plan for.

4. Should I build a native or a cross-platform app?

Native (Swift or Kotlin) is the right call when you need maximum performance, deep hardware access, or platform-specific UX, which is typical for IoT-connected and enterprise products. Cross-platform (React Native or Flutter) wins when speed to market and budget matter most and the app’s requirements are similar on both platforms. We build both, so our recommendation follows your product rather than our stack.

5. What does your mobile app development process look like?

Our mobile app development process includes 5 steps: functional specification, UX/UI design, app development, QA and bug fixing, and post-launch technical and marketing support. You get a dedicated project manager, regular demos, and sign-off at every stage.

6. Can you take over an app another team built?

Yes. We start with a code and architecture audit, report what we find, and agree a plan before touching anything. From there we can stabilize the current version, migrate it off a discontinued framework, or rebuild the parts that hold the product back, without losing your users or your data.

7. Do you support and maintain the app after launch?

Yes, and the same engineers who built the app do it. Maintenance covers iOS and Android OS updates, security and dependency patching, crash and performance monitoring, and a prioritized backlog of improvements based on real usage.

8. Do you sign an NDA, and who owns the code?

We sign a non-disclosure agreement before you share the details of your project, and the NDA option is right in the form on this page. All intellectual property, source code, and design files are transferred to you as standard, not as a paid extra.

Why us?

Domain expertise

Mobile products delivered since 2012 across finance, automotive, IoT, education, and on-demand services, for clients from startups to enterprises.

Top tech talent

We hire only 5% of the engineers we interview, and average team experience is 7.5 years.

Business focused

We build apps to hit business targets, not just to ship features. Conversion, retention, and operational savings are part of the spec from day one, with a 98% customer satisfaction rate to show for it.

Building products that matter

Two minutes on who we are, how we work, and what it is like to build a product with our team.

Watch on YouTube

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